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src/components/ChannelSelector.tsx

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+import React, { useState } from 'react';
+
+interface TwitchChannel {
+  id: string;
+  name: string;
+  displayName: string;
+  title: string;
+  profileImageUrl?: string;
+}
+
+interface ChannelSelectorProps {
+  channels: TwitchChannel[];
+  selectedChannel: string;
+  onChannelChange: (channelId: string) => void;
+  platform: 'twitch' | 'youtube';
+}
+
+export default function ChannelSelector({
+  channels,
+  selectedChannel,
+  onChannelChange,
+  platform,
+}: ChannelSelectorProps) {
+  const [manualChannel, setManualChannel] = useState('');
+
+  if (channels.length === 0) return null;
+
+  const styles = {
+    container: {
+      padding: '8px',
+      background: '#1a1a1a',
+      boxShadow: 'none',
+    },
+    label: {
+      fontSize: '0.75rem',
+      fontWeight: '600',
+      color: '#94a3b8',
+      marginBottom: '8px',
+      display: 'block',
+      textTransform: 'uppercase' as const,
+      letterSpacing: '0.5px',
+    },
+    listContainer: {
+      display: 'flex',
+      flexWrap: 'wrap' as const,
+      gap: '8px',
+      marginBottom: '12px',
+    },
+    channelItem: (isSelected: boolean) => ({
+      display: 'flex',
+      flexDirection: 'column' as const,
+      alignItems: 'center',
+      cursor: 'pointer',
+      padding: '6px',
+      borderRadius: '8px',
+      border: isSelected ? '2px solid #3b82f6' : '2px solid transparent',
+      backgroundColor: isSelected ? '#1e3a5f' : 'transparent',
+      transition: 'all 0.2s ease',
+      flex: '0 0 auto',
+    }),
+    profileImage: {
+      width: '48px',
+      height: '48px',
+      borderRadius: '50%',
+      objectFit: 'cover' as const,
+      marginBottom: '4px',
+      border: '2px solid #333333',
+    },
+    channelName: {
+      fontSize: '0.75rem',
+      color: '#e2e8f0',
+      textAlign: 'center' as const,
+      maxWidth: '60px',
+      overflow: 'hidden' as const,
+      textOverflow: 'ellipsis' as const,
+      whiteSpace: 'nowrap' as const,
+    },
+  };
+
+  const handleManualJoin = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (manualChannel.trim()) {
+      onChannelChange(manualChannel.trim().toLowerCase());
+      setManualChannel('');
+    }
+  };
+
+  return (
+    <div style={styles.container as React.CSSProperties}>
+      <label style={styles.label}>
+        {platform === 'twitch' ? '📺 Channels' : '▶ Streams'}
+      </label>
+      
+      <div style={styles.listContainer as React.CSSProperties}>
+        {channels.map((channel) => (
+          <div
+            key={channel.id}
+            style={styles.channelItem(selectedChannel === channel.id) as React.CSSProperties}
+            onClick={() => onChannelChange(channel.id)}
+            title={channel.displayName}
+          >
+            {channel.profileImageUrl && (
+              <img
+                src={channel.profileImageUrl}
+                alt={channel.displayName}
+                style={styles.profileImage as React.CSSProperties}
+              />
+            )}
+            <span style={styles.channelName as React.CSSProperties}>
+              {channel.displayName}
+            </span>
+          </div>
+        ))}
+      </div>
+
+      <div style={{ marginTop: '12px' }}>
+        <label style={styles.label}>Or join manually</label>
+        <form onSubmit={handleManualJoin} style={{ display: 'flex', gap: '3px' }}>
+          <input
+            type="text"
+            value={manualChannel}
+            onChange={(e) => setManualChannel(e.target.value)}
+            placeholder="Enter channel name"
+            style={{
+              flex: 1,
+              padding: '6px',
+              border: '1px solid #333333',
+              fontSize: '0.85rem',
+              backgroundColor: '#0a0a0a',
+              color: '#e2e8f0',
+              minWidth: '0',
+            }}
+          />
+          <button
+            type="submit"
+            disabled={!manualChannel.trim()}
+            style={{
+              padding: '6px 8px',
+              border: 'none',
+              fontSize: '0.85rem',
+              cursor: manualChannel.trim() ? 'pointer' : 'not-allowed',
+              backgroundColor: manualChannel.trim() ? '#555555' : '#333333',
+              color: '#e2e8f0',
+              flexShrink: 0,
+            }}
+          >
+            Join
+          </button>
+        </form>
+      </div>
+    </div>
+  );
+}

src/components/ChatDisplay.tsx

@@ -0,0 +1,519 @@
+import React, { useState, useEffect, useMemo, memo } from 'react';
+import { MdStars, MdAutorenew, MdCardGiftcard, MdRefresh, MdReply, MdContentCopy, MdRedeem } from 'react-icons/md';
+import { GiHeartBeats } from 'react-icons/gi';
+import { FaUsers } from 'react-icons/fa';
+import type { ChatMessage, Platform } from '../lib/types';
+import { parseMessageWithEmotes } from '../lib/emotes';
+
+interface ChatDisplayProps {
+  messages: ChatMessage[];
+  isLoading: boolean;
+  selectedPlatforms: Platform[];
+  onReply?: (message: ChatMessage) => void;
+  channelName?: string;
+  channelDisplayName?: string;
+  streamTitle?: string;
+  isStreamLive?: boolean;
+  streamUptime?: string;
+  viewerCount?: number | null;
+  onRefreshEmotes?: () => void;
+  isRefreshingEmotes?: boolean;
+  onToggleSidebar?: () => void;
+  sidebarVisible?: boolean;
+  onCopyMessage?: () => void;
+  showStreamEmbed?: boolean;
+  onToggleStreamEmbed?: () => void;
+  currentUserDisplayName?: string;
+  fontSize?: number;
+  /** When provided (unified chat mode), renders this instead of the normal messages area */
+  unifiedChatSlot?: React.ReactNode;
+}
+
+function ChatDisplay({
+  messages,
+  isLoading,
+  selectedPlatforms,
+  onReply,
+  channelName,
+  channelDisplayName,
+  streamTitle,
+  isStreamLive,
+  streamUptime,
+  viewerCount,
+  onRefreshEmotes,
+  isRefreshingEmotes = false,
+  onToggleSidebar,
+  sidebarVisible = true,
+  onCopyMessage,
+  showStreamEmbed = true,
+  onToggleStreamEmbed,
+  currentUserDisplayName,
+  fontSize = 14,
+  unifiedChatSlot,
+}: ChatDisplayProps) {
+  const [filteredMessages, setFilteredMessages] = useState<ChatMessage[]>([]);
+  const [isAtBottom, setIsAtBottom] = useState(true);
+  const [newMessagesCount, setNewMessagesCount] = useState(0);
+  const [previousMessageCount, setPreviousMessageCount] = useState(0);
+  const messagesContainerRef = React.useRef<HTMLDivElement>(null);
+  const authorColorById = useMemo(() => {
+    const map = new Map<string, string>();
+    messages.forEach((message) => {
+      if (message.authorColor) {
+        map.set(message.id, message.authorColor);
+      }
+    });
+    return map;
+  }, [messages]);
+
+  useEffect(() => {
+    let filtered = messages;
+
+    // Remove optimistic placeholders when a matching real server message exists.
+    filtered = filtered.filter((msg, _, arr) => {
+      if (!msg.optimistic) return true;
+
+      // If there's a non-optimistic message with same content, reply target,
+      // and userId, prefer the real one and drop this optimistic placeholder.
+      const hasReal = arr.some((other) =>
+        other !== msg &&
+        !other.optimistic &&
+        other.isCurrentUser &&
+        other.userId === msg.userId &&
+        other.content === msg.content &&
+        ((other.replyTo?.id || '') === (msg.replyTo?.id || ''))
+      );
+
+      return !hasReal;
+    });
+
+    if (selectedPlatforms.length === 0) {
+      setFilteredMessages(filtered);
+    } else {
+      filtered = filtered.filter((msg) => selectedPlatforms.includes(msg.platform));
+      setFilteredMessages(filtered);
+    }
+
+    // Update new messages count when not at bottom
+    if (!isAtBottom) {
+      const newCount = filtered.length - previousMessageCount;
+      if (newCount > 0) {
+        setNewMessagesCount(newCount);
+      }
+    }
+  }, [messages, selectedPlatforms, isAtBottom, previousMessageCount]);
+
+  // Auto-scroll to bottom when messages change (only if user is at bottom)
+  useEffect(() => {
+    if (messagesContainerRef.current && isAtBottom) {
+      messagesContainerRef.current.scrollTop = messagesContainerRef.current.scrollHeight;
+    }
+  }, [filteredMessages, isAtBottom]);
+
+  // Track scroll position
+  useEffect(() => {
+    const handleScroll = () => {
+      if (messagesContainerRef.current) {
+        const { scrollTop, scrollHeight, clientHeight } = messagesContainerRef.current;
+        // Consider user at bottom if within 50px of bottom
+        const atBottom = scrollHeight - scrollTop - clientHeight < 50;
+        setIsAtBottom(atBottom);
+
+        // Reset new messages count when user scrolls back to bottom
+        if (atBottom) {
+          setNewMessagesCount(0);
+          setPreviousMessageCount(filteredMessages.length);
+        }
+      }
+    };
+
+    const container = messagesContainerRef.current;
+    if (container) {
+      container.addEventListener('scroll', handleScroll);
+      return () => container.removeEventListener('scroll', handleScroll);
+    }
+  }, [filteredMessages.length]);
+
+  // Handle emote tooltip on hover
+  useEffect(() => {
+    const handleEmoteHover = (e: Event) => {
+      const target = e.target as HTMLImageElement;
+
+      if (!target.classList.contains('chat-emote')) return;
+
+      if (e.type === 'mouseenter') {
+        const tooltipUrl = target.getAttribute('data-tooltip-url');
+        const emoteName = target.getAttribute('data-emote-name') || 'Emote';
+
+        if (tooltipUrl) {
+          const tooltip = document.createElement('div');
+          tooltip.className = 'chat-emote-tooltip';
+          tooltip.id = 'emote-tooltip';
+
+          const img = document.createElement('img');
+          img.src = tooltipUrl;
+          img.alt = emoteName;
+          tooltip.appendChild(img);
+
+          const nameDiv = document.createElement('div');
+          nameDiv.className = 'chat-emote-tooltip-name';
+          nameDiv.textContent = emoteName;
+          tooltip.appendChild(nameDiv);
+
+          document.body.appendChild(tooltip);
+
+          // Position tooltip near the mouse
+          const rect = target.getBoundingClientRect();
+          tooltip.style.left = (rect.left + window.scrollX) + 'px';
+          tooltip.style.top = (rect.top + window.scrollY - tooltip.offsetHeight - 10) + 'px';
+        }
+      } else if (e.type === 'mouseleave') {
+        const tooltip = document.getElementById('emote-tooltip');
+        if (tooltip) {
+          tooltip.remove();
+        }
+      }
+    };
+
+    const messagesContainer = messagesContainerRef.current;
+    if (messagesContainer) {
+      messagesContainer.addEventListener('mouseenter', handleEmoteHover, true);
+      messagesContainer.addEventListener('mouseleave', handleEmoteHover, true);
+    }
+
+    return () => {
+      if (messagesContainer) {
+        messagesContainer.removeEventListener('mouseenter', handleEmoteHover, true);
+        messagesContainer.removeEventListener('mouseleave', handleEmoteHover, true);
+      }
+    };
+  }, []);
+
+
+  // Helper to render message icon for special events
+  const renderMessageIcon = (msg: ChatMessage) => {
+    if (!msg.messageType) return null;
+
+    const iconConfig: Record<string, { title: string; color: string }> = {
+      cheer: { title: 'Cheer', color: '#FFB700' },
+      subscription: { title: 'Subscription', color: '#9147FF' },
+      resub: { title: 'Resub', color: '#9147FF' },
+      subgift: { title: 'Subgift', color: '#9147FF' },
+      redemption: { title: 'Channel Points Redemption', color: '#9147FF' },
+    };
+
+    const config = iconConfig[msg.messageType];
+    if (!config) return null;
+
+    let iconElement;
+    switch (msg.messageType) {
+      case 'cheer':
+        iconElement = <GiHeartBeats size={16} />;
+        break;
+      case 'subscription':
+        iconElement = <MdStars size={16} />;
+        break;
+      case 'resub':
+        iconElement = <MdAutorenew size={16} />;
+        break;
+      case 'subgift':
+        iconElement = <MdCardGiftcard size={16} />;
+        break;
+      case 'redemption':
+        iconElement = <MdRedeem size={16} />;
+        break;
+      default:
+        return null;
+    }
+
+    return (
+      <span
+        title={config.title}
+        style={{
+          marginRight: '6px',
+          display: 'inline-flex',
+          alignItems: 'center',
+          color: config.color,
+          filter: `drop-shadow(0 0 2px ${config.color})`,
+        }}
+      >
+        {iconElement}
+      </span>
+    );
+  };
+
+  // Helper to render badges
+  const renderBadges = (msg: ChatMessage) => {
+    // Prefer detailed badge info if available (contains titles/descriptions)
+    if (msg.badgeDetails && Object.keys(msg.badgeDetails).length > 0) {
+      return (
+        <div className="message-badges" style={{ display: 'flex', alignItems: 'center', marginRight: '4px', gap: '2px' }}>
+          {Object.entries(msg.badgeDetails).map(([name, detail]) => (
+            <img
+              key={name}
+              src={detail.url}
+              alt={detail.title}
+              className="badge"
+              title={detail.title}
+              loading="eager"
+              style={{
+                width: '18px',
+                height: '18px',
+                verticalAlign: 'middle'
+              }}
+            />
+          ))}
+        </div>
+      );
+    }
+
+    // Fallback for platform-agnostic or historical badges
+    if (!msg.badges || Object.keys(msg.badges).length === 0) return null;
+
+    return (
+      <div className="message-badges" style={{ display: 'flex', alignItems: 'center', marginRight: '4px', gap: '2px' }}>
+        {Object.entries(msg.badges).map(([name, badgeUrl]) => {
+          if (!badgeUrl) return null;
+
+          return (
+            <img
+              key={`${name}`}
+              src={badgeUrl}
+              alt={name}
+              className="badge"
+              title={name}
+              loading="eager"
+              style={{
+                width: '18px',
+                height: '18px',
+                verticalAlign: 'middle'
+              }}
+            />
+          );
+        })}
+      </div>
+    );
+  };
+
+  return (
+    <div className="chat-display">
+      <div className="chat-header">
+        <div className="chat-header-content">
+          {onToggleSidebar && (
+            <button
+              onClick={onToggleSidebar}
+              className="sidebar-toggle-button"
+              title={sidebarVisible ? 'Hide sidebar' : 'Show sidebar'}
+            >
+              {sidebarVisible ? '◀' : '▶'}
+            </button>
+          )}
+          {!showStreamEmbed && onToggleStreamEmbed && (
+            <button
+              onClick={onToggleStreamEmbed}
+              className="show-stream-button"
+              title="Show stream embed"
+            >
+              Show Stream
+            </button>
+          )}
+          <h2>
+            {isStreamLive ? (
+              <span className="status-badge-live">
+                <span className="status-dot pulse" />
+                LIVE
+              </span>
+            ) : (
+              <span className="status-badge-offline">
+                <span className="status-dot" />
+                OFFLINE
+              </span>
+            )}
+            <a
+              href={`https://twitch.tv/${channelName}`}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="channel-link"
+            >
+              {channelDisplayName || channelName || 'Chat'}
+            </a>
+            {viewerCount !== undefined && viewerCount !== null && (
+              <span className="viewer-count-display">
+                <FaUsers size={14} /> {viewerCount.toLocaleString()}
+              </span>
+            )}
+            {streamUptime && isStreamLive && (
+              <span className="uptime-display">
+                ({streamUptime})
+              </span>
+            )}
+          </h2>
+          {streamTitle && <span className="stream-title">{streamTitle}</span>}
+        </div>
+        <div className="chat-header-actions">
+          {onRefreshEmotes && (
+            <button
+              onClick={onRefreshEmotes}
+              disabled={isRefreshingEmotes}
+              className="header-button"
+              title={isRefreshingEmotes ? 'Reloading emotes...' : 'Reload all emotes (clears cache)'}
+              style={{ display: 'flex', alignItems: 'center', gap: '6px' }}
+            >
+              <MdRefresh size={14} style={{ animation: isRefreshingEmotes ? 'spin 1s linear infinite' : 'none' }} />
+              {isRefreshingEmotes ? 'Reloading...' : 'Reload Emotes'}
+            </button>
+          )}
+          {isLoading && <span className="loading-indicator">●</span>}
+        </div>
+      </div>
+
+      {unifiedChatSlot ? (
+        unifiedChatSlot
+      ) : (
+        <div
+          className="messages-container"
+          ref={messagesContainerRef}
+          style={{ '--chat-font-size': `${fontSize}px` } as React.CSSProperties}
+        >
+          {filteredMessages.length === 0 ? (
+            <div className="no-messages">
+              <p>No messages yet. Start chatting!</p>
+            </div>
+          ) : (
+            filteredMessages.map((msg) => {
+              const isMentioned = currentUserDisplayName && msg.content.includes(currentUserDisplayName);
+              const messageClasses = [
+                'message',
+                msg.messageType || 'chat',
+                msg.isPreloaded ? 'preloaded' : '',
+                msg.isBot ? 'bot' : '',
+                ((msg.mentionsUser || isMentioned) && !msg.isBot) ? 'mention' : ''
+              ].filter(Boolean).join(' ');
+
+              return (
+                <div key={msg.id} className={messageClasses}>
+                  {msg.replyTo && (
+                    <div className="reply-info">
+                      <span>response to{' '}
+                        <span
+                          style={{
+                            color: authorColorById.get(msg.replyTo.id) || '#94a3b8',
+                          }}
+                        >
+                          @{msg.replyTo.author}
+                        </span>
+                        {msg.replyTo.content && (
+                          <>
+                            {': '}
+                            <span
+                              className="reply-target-content"
+                              dangerouslySetInnerHTML={{
+                                __html: parseMessageWithEmotes(msg.replyTo.content)
+                              }}
+                            />
+                          </>
+                        )}
+                      </span>
+
+                    </div>
+                  )}
+                  <div className="message-single-line">
+                    <span className="timestamp">
+                      {msg.timestamp.toLocaleTimeString()}
+                    </span>
+                    {msg.authorAvatar && (
+                      <img
+                        src={msg.authorAvatar}
+                        alt={msg.author}
+                        className="avatar"
+                      />
+                    )}
+                    {renderMessageIcon(msg)}
+                    {renderBadges(msg)}
+                    <a
+                      href={`https://twitch.tv/${msg.author}`}
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className={`author author-link ${msg.isCurrentUser ? 'self' : ''}`}
+                      style={{
+                        color: msg.isCurrentUser ? '#ffffff' : (msg.authorColor || '#e2e8f0'),
+                      }}
+                    >
+                      {msg.author}
+                    </a>
+                    <span className="message-separator">:</span>
+                    <span
+                      className="message-text"
+                      dangerouslySetInnerHTML={{
+                        __html: parseMessageWithEmotes(msg.content, msg.emotes),
+                      }}
+                    />
+                    <div className="message-actions">
+                      {onReply && (
+                        <button
+                          onClick={() => onReply(msg)}
+                          className="action-button"
+                          title="Reply to this message"
+                          style={{ display: 'flex', alignItems: 'center', gap: '4px' }}
+                        >
+                          <MdReply size={12} />
+                        </button>
+                      )}
+                      <button
+                        onClick={() => {
+                          if (navigator.clipboard) {
+                            navigator.clipboard.writeText(msg.content).then(() => {
+                              onCopyMessage?.();
+                            }).catch((err) => {
+                              console.error('Failed to copy:', err);
+                            });
+                          } else {
+                            // Fallback for environments without clipboard API
+                            const textArea = document.createElement('textarea');
+                            textArea.value = msg.content;
+                            document.body.appendChild(textArea);
+                            textArea.select();
+                            try {
+                              document.execCommand('copy');
+                              onCopyMessage?.();
+                            } catch (err) {
+                              console.error('Failed to copy:', err);
+                            }
+                            document.body.removeChild(textArea);
+                          }
+                        }}
+                        className="action-button"
+                        title="Copy message"
+                        style={{ display: 'flex', alignItems: 'center', gap: '4px' }}
+                      >
+                        <MdContentCopy size={12} />
+                      </button>
+                    </div>
+                  </div>
+                </div>
+              );
+            })
+          )}
+        </div>
+      )}
+      {!isAtBottom && !unifiedChatSlot && (
+        <button
+          onClick={() => {
+            if (messagesContainerRef.current) {
+              messagesContainerRef.current.scrollTop = messagesContainerRef.current.scrollHeight;
+              setIsAtBottom(true);
+              setNewMessagesCount(0);
+              setPreviousMessageCount(filteredMessages.length);
+            }
+          }}
+          className="go-to-bottom-button"
+          title="Go to latest messages"
+        >
+          {newMessagesCount > 0 ? `New Messages (${newMessagesCount})` : 'New Messages'}
+        </button>
+      )}
+    </div>
+  );
+}
+
+export default memo(ChatDisplay);

src/components/EmbedConfigModal.tsx

@@ -0,0 +1,271 @@
+import React from 'react';
+import { FaTimes } from 'react-icons/fa';
+
+interface EmbedConfigModalProps {
+  embedDefaultOpen: boolean;
+  onEmbedDefaultOpenChange: (value: boolean) => void;
+  unifyChatEnabled: boolean;
+  onUnifyChatEnabledChange: (value: boolean) => void;
+  fontSize: number;
+  onFontSizeChange: (value: number) => void;
+  mentionSoundEnabled: boolean;
+  onMentionSoundEnabledChange: (value: boolean) => void;
+  onClose: () => void;
+}
+
+export default function EmbedConfigModal({
+  embedDefaultOpen,
+  onEmbedDefaultOpenChange,
+  unifyChatEnabled,
+  onUnifyChatEnabledChange,
+  fontSize,
+  onFontSizeChange,
+  mentionSoundEnabled,
+  onMentionSoundEnabledChange,
+  onClose,
+}: EmbedConfigModalProps) {
+  return (
+    <div
+      style={{
+        position: 'fixed',
+        inset: '0',
+        backgroundColor: 'rgba(0, 0, 0, 0.7)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        zIndex: '1000',
+      }}
+      onClick={onClose}
+    >
+      <div
+        style={{
+          backgroundColor: '#1a1a1a',
+          borderRadius: '8px',
+          border: '1px solid #333333',
+          padding: '24px',
+          maxWidth: '400px',
+          width: '90%',
+          boxShadow: '0 10px 40px rgba(0, 0, 0, 0.8)',
+        }}
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div
+          style={{
+            display: 'flex',
+            justifyContent: 'space-between',
+            alignItems: 'center',
+            marginBottom: '20px',
+          }}
+        >
+          <h2
+            style={{
+              margin: 0,
+              color: '#e2e8f0',
+              fontSize: '18px',
+              fontWeight: '600',
+            }}
+          >
+            Global Settings
+          </h2>
+          <button
+            onClick={onClose}
+            style={{
+              background: 'none',
+              border: 'none',
+              color: '#999',
+              cursor: 'pointer',
+              padding: '0',
+              display: 'flex',
+              alignItems: 'center',
+              lineHeight: '1',
+            }}
+            title="Close"
+          >
+            <FaTimes size={20} />
+          </button>
+        </div>
+
+        <div style={{ marginBottom: '24px' }}>
+          <label
+            style={{
+              display: 'block',
+              marginBottom: '12px',
+              color: '#e2e8f0',
+              fontSize: '14px',
+              fontWeight: '500',
+            }}
+          >
+            Chat Font Size: <span style={{ color: '#6366f1', marginLeft: '4px' }}>{fontSize}px</span>
+          </label>
+          <div style={{ display: 'flex', alignItems: 'center', gap: '12px' }}>
+            <span style={{ fontSize: '12px', color: '#94a3b8' }}>12px</span>
+            <input
+              type="range"
+              min="12"
+              max="32"
+              step="1"
+              value={fontSize}
+              onChange={(e) => onFontSizeChange(parseInt(e.target.value))}
+              style={{
+                flex: 1,
+                cursor: 'pointer',
+                accentColor: '#6366f1',
+                height: '4px',
+              }}
+            />
+            <span style={{ fontSize: '12px', color: '#94a3b8' }}>32px</span>
+          </div>
+          <p
+            style={{
+              marginTop: '8px',
+              color: '#94a3b8',
+              fontSize: '12px',
+            }}
+          >
+            Adjust the size of the text in the chat window.
+          </p>
+        </div>
+
+        <div style={{ marginBottom: '24px' }}>
+          <label
+            style={{
+              display: 'flex',
+              alignItems: 'center',
+              gap: '12px',
+              cursor: 'pointer',
+              color: '#e2e8f0',
+              userSelect: 'none',
+            }}
+          >
+            <input
+              type="checkbox"
+              checked={embedDefaultOpen}
+              onChange={(e) => onEmbedDefaultOpenChange(e.target.checked)}
+              style={{
+                width: '18px',
+                height: '18px',
+                cursor: 'pointer',
+                accentColor: '#6366f1',
+              }}
+            />
+            <span style={{ fontSize: '14px' }}>
+              Open stream embed by default
+            </span>
+          </label>
+          <p
+            style={{
+              marginTop: '8px',
+              color: '#94a3b8',
+              fontSize: '12px',
+              margin: '8px 0 0 30px',
+            }}
+          >
+            If enabled, the stream embed will be visible when you open Mixchat. If disabled, the chat will take up the full width.
+          </p>
+        </div>
+
+        <div style={{ marginBottom: '24px' }}>
+          <label
+            style={{
+              display: 'flex',
+              alignItems: 'center',
+              gap: '12px',
+              cursor: 'pointer',
+              color: '#e2e8f0',
+              userSelect: 'none',
+            }}
+          >
+            <input
+              type="checkbox"
+              checked={unifyChatEnabled}
+              onChange={(e) => onUnifyChatEnabledChange(e.target.checked)}
+              style={{
+                width: '18px',
+                height: '18px',
+                cursor: 'pointer',
+                accentColor: '#6366f1',
+              }}
+            />
+            <span style={{ fontSize: '14px' }}>
+              Unify chats
+            </span>
+          </label>
+          <p
+            style={{
+              marginTop: '8px',
+              color: '#94a3b8',
+              fontSize: '12px',
+              margin: '8px 0 0 30px',
+            }}
+          >
+            When enabled, Twitch and YouTube messages appear together in a single chronological feed. Each platform keeps its own styling and features.
+          </p>
+        </div>
+
+        <div style={{ marginBottom: '24px' }}>
+          <label
+            style={{
+              display: 'flex',
+              alignItems: 'center',
+              gap: '12px',
+              cursor: 'pointer',
+              color: '#e2e8f0',
+              userSelect: 'none',
+            }}
+          >
+            <input
+              type="checkbox"
+              checked={mentionSoundEnabled}
+              onChange={(e) => onMentionSoundEnabledChange(e.target.checked)}
+              style={{
+                width: '18px',
+                height: '18px',
+                cursor: 'pointer',
+                accentColor: '#6366f1',
+              }}
+            />
+            <span style={{ fontSize: '14px' }}>
+              Play sound on mention
+            </span>
+          </label>
+          <p
+            style={{
+              marginTop: '8px',
+              color: '#94a3b8',
+              fontSize: '12px',
+              margin: '8px 0 0 30px',
+            }}
+          >
+            Plays a notification sound when someone mentions your name or replies to your message.
+          </p>
+        </div>
+
+        <div style={{ display: 'flex', justifyContent: 'flex-end', gap: '8px' }}>
+          <button
+            onClick={onClose}
+            style={{
+              padding: '8px 16px',
+              border: '1px solid #333333',
+              backgroundColor: '#0a0a0a',
+              color: '#e2e8f0',
+              borderRadius: '4px',
+              cursor: 'pointer',
+              fontSize: '14px',
+              transition: 'all 0.2s',
+            }}
+            onMouseEnter={(e) => {
+              (e.currentTarget as HTMLButtonElement).style.backgroundColor = '#1a1a1a';
+              (e.currentTarget as HTMLButtonElement).style.borderColor = '#555555';
+            }}
+            onMouseLeave={(e) => {
+              (e.currentTarget as HTMLButtonElement).style.backgroundColor = '#0a0a0a';
+              (e.currentTarget as HTMLButtonElement).style.borderColor = '#333333';
+            }}
+          >
+            Close
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/EmoteMenu.tsx

@@ -0,0 +1,223 @@
+import React, { useState, useRef, useEffect, memo } from 'react';
+import { FaSearch } from 'react-icons/fa';
+import type { EmotesBySource } from '../lib/emotes';
+import { toggleDisableEmote, getDisabledEmotes } from '../lib/emotes';
+import '../styles/EmoteMenu.css';
+
+interface EmoteMenuProps {
+  emotes: EmotesBySource;
+  onSelectEmote: (emoteName: string) => void;
+  isOpen: boolean;
+  onClose: () => void;
+}
+
+function EmoteMenu({ emotes, onSelectEmote, isOpen, onClose }: EmoteMenuProps) {
+  const [searchQuery, setSearchQuery] = useState('');
+  const [filteredEmotes, setFilteredEmotes] = useState<EmotesBySource>(emotes);
+  const [activeSection, setActiveSection] = useState<'twitch' | '7tv' | 'bttv' | 'ffz'>('twitch');
+  const [disabledSet, setDisabledSet] = useState<Set<string>>(new Set());
+  const menuRef = useRef<HTMLDivElement>(null);
+  const searchInputRef = useRef<HTMLInputElement>(null);
+  const contentRef = useRef<HTMLDivElement>(null);
+  const sectionRefs = useRef<Record<string, HTMLDivElement | null>>({
+    twitch: null,
+    '7tv': null,
+    bttv: null,
+    ffz: null,
+  });
+  const scrollToSection = (section: string) => {
+    setActiveSection(section as any);
+    const sectionElement = sectionRefs.current[section];
+    if (sectionElement && contentRef.current) {
+      const scrollTop = sectionElement.offsetTop - contentRef.current.offsetTop;
+      contentRef.current.scrollTo({ top: scrollTop, behavior: 'smooth' });
+    }
+  };
+
+  // Filter emotes based on search query
+  useEffect(() => {
+    if (!searchQuery.trim()) {
+      setFilteredEmotes(emotes);
+      return;
+    }
+
+    const lowerQuery = searchQuery.toLowerCase();
+    setFilteredEmotes({
+      twitch: emotes.twitch.filter(e => e.name.toLowerCase().includes(lowerQuery)),
+      '7tv': emotes['7tv'].filter(e => e.name.toLowerCase().includes(lowerQuery)),
+      bttv: emotes.bttv.filter(e => e.name.toLowerCase().includes(lowerQuery)),
+      ffz: emotes.ffz.filter(e => e.name.toLowerCase().includes(lowerQuery)),
+    });
+  }, [searchQuery, emotes]);
+
+  // Reset search and display all emotes when menu opens
+  useEffect(() => {
+    if (isOpen) {
+      setSearchQuery('');
+      setActiveSection('twitch');
+      setFilteredEmotes(emotes);
+      setDisabledSet(getDisabledEmotes());
+      if (searchInputRef.current) {
+        searchInputRef.current.focus();
+      }
+    }
+  }, [isOpen, emotes]);
+
+  // Update disabled emotes when global emote state changes
+  useEffect(() => {
+    const handler = () => setDisabledSet(getDisabledEmotes());
+    window.addEventListener('emotes-reloaded', handler);
+    return () => window.removeEventListener('emotes-reloaded', handler);
+  }, []);
+
+  // Close menu when clicking outside
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (menuRef.current && !menuRef.current.contains(event.target as Node)) {
+        onClose();
+      }
+    };
+
+    if (isOpen) {
+      document.addEventListener('mousedown', handleClickOutside);
+      return () => document.removeEventListener('mousedown', handleClickOutside);
+    }
+  }, [isOpen, onClose]);
+
+  // Handle keyboard escape
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape' && isOpen) {
+        onClose();
+      }
+    };
+
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [isOpen, onClose]);
+
+  if (!isOpen) return null;
+
+  const sources = [
+    { key: 'twitch', label: 'Twitch', color: '#9146ff' },
+    { key: '7tv' as const, label: '7TV', color: '#00d4ff' },
+    { key: 'bttv', label: 'BTTV', color: '#34ae7b' },
+    { key: 'ffz', label: 'FFZ', color: '#faa61a' },
+  ] as const;
+
+  return (
+    <div className="emote-menu-overlay">
+      <div ref={menuRef} className="emote-menu-modal">
+        <div className="emote-menu-header">
+          <h2>Emotes</h2>
+          <button className="emote-menu-close" onClick={onClose}>
+            ✕
+          </button>
+        </div>
+
+        <div className="emote-menu-search">
+          <FaSearch size={16} style={{ color: '#94a3b8' }} />
+          <input
+            ref={searchInputRef}
+            type="text"
+            placeholder="Search emotes..."
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            className="emote-search-input"
+          />
+        </div>
+
+        <div className="emote-menu-tabs">
+          {sources.map(({ key, label, color }) => (
+            <button
+              key={key}
+              className={`emote-tab ${activeSection === key ? 'active' : ''}`}
+              onClick={() => scrollToSection(key)}
+              style={{
+                color: activeSection === key ? color : '#cbd5e1',
+                borderBottomColor: activeSection === key ? color : 'transparent',
+              }}
+            >
+              {label}
+            </button>
+          ))}
+        </div>
+
+        <div className="emote-menu-content" ref={contentRef}>
+          {sources.map(({ key, label, color }) => {
+            const sourceEmotes = filteredEmotes[key];
+
+            return (
+              <div
+                key={key}
+                className="emote-source-section"
+                ref={(el) => {
+                  if (el) sectionRefs.current[key] = el;
+                }}
+              >
+                <div className="emote-source-header">
+                  <div
+                    className="emote-source-dot"
+                    style={{ backgroundColor: color }}
+                  />
+                  <h3 style={{ color }}>{label}</h3>
+                  <span className="emote-source-count">({sourceEmotes.length})</span>
+                </div>
+                {sourceEmotes.length > 0 ? (
+                  <div className="emote-grid">
+                    {sourceEmotes.map((emote) => {
+                      const isDisabled = disabledSet.has(emote.name);
+                      return (
+                        <div
+                          key={emote.name}
+                          className={`emote-item ${isDisabled ? 'emote-disabled' : ''}`}
+                          onClick={() => {
+                            if (!isDisabled) {
+                              onSelectEmote(emote.name);
+                              setSearchQuery('');
+                            }
+                          }}
+                          title={emote.name}
+                        >
+                          <button
+                            className="emote-disable-btn"
+                            onClick={(e) => {
+                              e.stopPropagation();
+                              toggleDisableEmote(emote.name);
+                              setDisabledSet(getDisabledEmotes());
+                            }}
+                            title={isDisabled ? 'Enable emote' : 'Disable emote'}
+                          >
+                            {isDisabled ? 'Enable' : 'Disable'}
+                          </button>
+                          <img
+                            src={emote.url}
+                            alt={emote.name}
+                            className="emote-image"
+                          />
+                          <span className="emote-name">{emote.name}</span>
+                        </div>
+                      );
+                    })}
+                  </div>
+                ) : (
+                  <div className="emote-no-results-section">
+                    No {label} emotes available
+                  </div>
+                )}
+              </div>
+            );
+          })}
+
+          {Object.values(filteredEmotes).every(arr => arr.length === 0) && (
+            <div className="emote-no-results">
+              No emotes found matching "{searchQuery}"
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default memo(EmoteMenu);

src/components/LiveNotification.tsx

@@ -0,0 +1,48 @@
+import React from 'react';
+import { FaTimes } from 'react-icons/fa';
+import type { LiveStreamer } from '../lib/streamMonitor';
+import '../styles/LiveNotification.css';
+
+interface LiveNotificationProps {
+  streamer: LiveStreamer;
+  onViewNow: () => void;
+  onClose: () => void;
+}
+
+export default function LiveNotification({
+  streamer,
+  onViewNow,
+  onClose,
+}: LiveNotificationProps) {
+  return (
+    <div className="live-notification">
+      <div className="live-notification-header">
+        <div className="live-notification-title">
+          <span className="live-badge">LIVE</span>
+          <span className="streamer-name">{streamer.displayName}</span>
+        </div>
+        <button className="live-notification-close" onClick={onClose} aria-label="Close">
+          <FaTimes />
+        </button>
+      </div>
+
+      {streamer.profileImageUrl && (
+        <img
+          src={streamer.profileImageUrl}
+          alt={streamer.displayName}
+          className="streamer-avatar"
+        />
+      )}
+
+      {streamer.title && <div className="stream-title">{streamer.title}</div>}
+
+      {streamer.viewerCount && (
+        <div className="viewer-count">👥 {streamer.viewerCount.toLocaleString()} watching</div>
+      )}
+
+      <button className="view-now-button" onClick={onViewNow}>
+        View Now
+      </button>
+    </div>
+  );
+}

src/components/LoginPanel.tsx

@@ -0,0 +1,285 @@
+import React, { memo } from 'react';
+import { FaStar, FaRegStar, FaUsers, FaEye, FaYoutube, FaCog } from 'react-icons/fa';
+import EmbedConfigModal from './EmbedConfigModal';
+
+interface TwitchChannel {
+  id: string;
+  name: string;
+  displayName: string;
+  title: string;
+  profileImageUrl?: string;
+  viewerCount?: number;
+}
+
+interface LoginPanelProps {
+  twitchConnected: boolean;
+  twitchUser?: string;
+  twitchProfileImage?: string;
+  twitchUserName?: string;
+  twitchChannels?: TwitchChannel[];
+  selectedTwitchChannel?: string;
+  favoriteChannels?: string[];
+  onChannelChange?: (channelId: string) => void;
+  onToggleFavorite?: (channelId: string) => void;
+  onTwitchLogin: () => void;
+  onTwitchLogout: () => void;
+  youtubeConnected?: boolean;
+  youtubeUser?: string;
+  onYoutubeLogin?: () => void;
+  onYoutubeLogout?: () => void;
+  onManageWatchlist?: () => void;
+  onManageYoutubeLinks?: () => void;
+  embedDefaultOpen?: boolean;
+  onEmbedDefaultOpenChange?: (value: boolean) => void;
+  unifyChatEnabled?: boolean;
+  onUnifyChatEnabledChange?: (value: boolean) => void;
+  fontSize?: number;
+  onFontSizeChange?: (value: number) => void;
+  mentionSoundEnabled?: boolean;
+  onMentionSoundEnabledChange?: (value: boolean) => void;
+}
+
+function LoginPanel({
+  twitchConnected,
+  twitchUser,
+  twitchProfileImage,
+  twitchUserName,
+  twitchChannels = [],
+  selectedTwitchChannel = '',
+  favoriteChannels = [],
+  onChannelChange,
+  onToggleFavorite,
+  onTwitchLogin,
+  onTwitchLogout,
+  youtubeConnected,
+  youtubeUser,
+  onYoutubeLogin,
+  onYoutubeLogout,
+  onManageWatchlist,
+  onManageYoutubeLinks,
+  embedDefaultOpen = true,
+  onEmbedDefaultOpenChange,
+  unifyChatEnabled = false,
+  onUnifyChatEnabledChange,
+  fontSize = 14,
+  onFontSizeChange,
+  mentionSoundEnabled = true,
+  onMentionSoundEnabledChange,
+}: LoginPanelProps) {
+  const [manualChannel, setManualChannel] = React.useState('');
+  const [searchQuery, setSearchQuery] = React.useState('');
+  const [showEmbedConfig, setShowEmbedConfig] = React.useState(false);
+
+  const filteredChannels = React.useMemo(() => {
+    if (!searchQuery.trim()) return twitchChannels;
+    const query = searchQuery.toLowerCase();
+    return twitchChannels.filter(
+      (channel) =>
+        channel.displayName.toLowerCase().includes(query) ||
+        channel.name.toLowerCase().includes(query)
+    );
+  }, [searchQuery, twitchChannels]);
+
+  const handleManualJoin = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (manualChannel.trim() && onChannelChange) {
+      onChannelChange(manualChannel.trim().toLowerCase());
+      setManualChannel('');
+    }
+  };
+  return (
+    <div className="login-panel">
+      <div className="login-panel-header">
+        <h3>Connected Accounts</h3>
+        <button
+          onClick={() => setShowEmbedConfig(true)}
+          className="icon-button small"
+          title="Configure global settings"
+        >
+          <FaCog />
+        </button>
+      </div>
+
+      <div className="platform-login twitch">
+        <div className="platform-header">
+          <span className="platform-name">Twitch</span>
+        </div>
+
+        {twitchConnected && twitchUser ? (
+          <div className="connected-info">
+            <div className="user-profile-container">
+              <div
+                className="user-profile-link"
+                onClick={() => twitchUserName && onChannelChange?.(twitchUserName)}
+                title={`Switch to ${twitchUser}'s channel`}
+              >
+                {twitchProfileImage && (
+                  <img src={twitchProfileImage} alt={twitchUser} className="profile-image" loading="eager" />
+                )}
+                <div className="user-details">
+                  <p className="user-name">{twitchUser}</p>
+                </div>
+              </div>
+
+              <div className="user-actions">
+                {onManageWatchlist && (
+                  <button
+                    onClick={onManageWatchlist}
+                    className="icon-button"
+                    title="Manage Notification Streams"
+                  >
+                    <FaEye />
+                  </button>
+                )}
+                {onManageYoutubeLinks && (
+                  <button
+                    onClick={onManageYoutubeLinks}
+                    className="icon-button youtube-icon-btn"
+                    title="Link YouTube channels"
+                  >
+                    <FaYoutube />
+                  </button>
+                )}
+              </div>
+            </div>
+            <button onClick={onTwitchLogout} className="logout-btn">
+              Logout
+            </button>
+
+            {twitchChannels && twitchChannels.length > 0 && (
+              <div className="channels-section">
+                <label className="section-label">
+                  Channels ({filteredChannels.length})
+                </label>
+                <input
+                  type="text"
+                  placeholder="Search channels..."
+                  value={searchQuery}
+                  onChange={(e) => setSearchQuery(e.target.value)}
+                  className="channel-search-input"
+                />
+                <div className="channel-list">
+                  {filteredChannels.map((channel) => (
+                    <div
+                      key={channel.id}
+                      className={`channel-item ${selectedTwitchChannel === channel.id ? 'selected' : ''}`}
+                      onClick={() => onChannelChange?.(channel.id)}
+                      title={channel.displayName}
+                    >
+                      {channel.profileImageUrl && (
+                        <img
+                          src={channel.profileImageUrl}
+                          alt={channel.displayName}
+                          className="channel-item-image"
+                        />
+                      )}
+                      <span className="channel-item-name">
+                        {channel.displayName}
+                      </span>
+                      {channel.viewerCount !== undefined && channel.viewerCount !== null && (
+                        <span className="viewer-count">
+                          <FaUsers size={12} /> {channel.viewerCount.toLocaleString()}
+                        </span>
+                      )}
+                      <button
+                        onClick={(e) => {
+                          e.stopPropagation(); // Don't also select the channel when toggling a favorite
+                          onToggleFavorite?.(channel.id);
+                        }}
+                        className={`favorite-button ${favoriteChannels.includes(channel.id) ? 'active' : ''}`}
+                        title={favoriteChannels.includes(channel.id) ? 'Remove from favorites' : 'Add to favorites'}
+                      >
+                        {favoriteChannels.includes(channel.id) ? <FaStar size={16} /> : <FaRegStar size={16} />}
+                      </button>
+                    </div>
+                  ))}
+                </div>
+
+                <div className="manual-join-section">
+                  <label className="section-label">
+                    Or join manually
+                  </label>
+                  <form onSubmit={handleManualJoin} className="join-form">
+                    <input
+                      type="text"
+                      value={manualChannel}
+                      onChange={(e) => setManualChannel(e.target.value)}
+                      placeholder="Enter channel name"
+                      className="join-input"
+                    />
+                    <button
+                      type="submit"
+                      disabled={!manualChannel.trim()}
+                      className="logout-btn"
+                      style={{
+                        backgroundColor: manualChannel.trim() ? '#555555' : '#333333',
+                        cursor: manualChannel.trim() ? 'pointer' : 'not-allowed',
+                      }}
+                    >
+                      Join
+                    </button>
+                  </form>
+                </div>
+              </div>
+            )}
+          </div>
+        ) : (
+          <button onClick={onTwitchLogin} className="login-btn twitch-btn">
+            Login with Twitch
+          </button>
+        )}
+
+        {/* YouTube login/logout */}
+        <div className="youtube-section">
+          {youtubeConnected ? (
+            <div className="youtube-info-row">
+              <div className="youtube-user-info">
+                <FaYoutube style={{ color: '#FF0000', fontSize: '18px', flexShrink: 0 }} />
+                <span className="youtube-user-name">{youtubeUser || 'YouTube'}</span>
+              </div>
+              <button onClick={onYoutubeLogout} className="logout-btn small">
+                Logout
+              </button>
+            </div>
+          ) : onYoutubeLogin ? (
+            <button onClick={onYoutubeLogin} className="login-btn youtube-btn" style={{ width: '100%' }}>
+              Login with YouTube
+            </button>
+          ) : null}
+        </div>
+      </div>
+
+      {showEmbedConfig && (
+        <EmbedConfigModal
+          embedDefaultOpen={embedDefaultOpen}
+          onEmbedDefaultOpenChange={(value) => {
+            if (onEmbedDefaultOpenChange) {
+              onEmbedDefaultOpenChange(value);
+            }
+          }}
+          unifyChatEnabled={unifyChatEnabled}
+          onUnifyChatEnabledChange={(value) => {
+            if (onUnifyChatEnabledChange) {
+              onUnifyChatEnabledChange(value);
+            }
+          }}
+          fontSize={fontSize}
+          onFontSizeChange={(value) => {
+            if (onFontSizeChange) {
+              onFontSizeChange(value);
+            }
+          }}
+          mentionSoundEnabled={mentionSoundEnabled}
+          onMentionSoundEnabledChange={(value) => {
+            if (onMentionSoundEnabledChange) {
+              onMentionSoundEnabledChange(value);
+            }
+          }}
+          onClose={() => setShowEmbedConfig(false)}
+        />
+      )}
+    </div>
+  );
+}
+
+export default memo(LoginPanel);

src/components/MessageInput.tsx

@@ -0,0 +1,518 @@
+import React, { useState, useRef, useEffect, memo, useCallback } from 'react';
+import { FaTimes, FaSmile, FaTwitch } from 'react-icons/fa';
+import type { Platform, ChatMessage } from '../lib/types';
+import { searchEmotes, getAllEmotesOrganized, type EmotesBySource } from '../lib/emotes';
+import EmoteMenu from './EmoteMenu';
+
+interface MessageInputProps {
+  onSendMessage: (message: string, platforms: Platform[], replyToId?: string) => Promise<void>;
+  isLoading: boolean;
+  isConnected: { twitch: boolean };
+  replyingTo?: ChatMessage;
+  onCancelReply?: () => void;
+  chatMessages?: ChatMessage[];
+  currentUsername?: string;
+}
+
+function MessageInput({
+  onSendMessage,
+  isLoading,
+  isConnected,
+  replyingTo,
+  onCancelReply,
+  chatMessages = [],
+  currentUsername = '',
+}: MessageInputProps) {
+  const [message, setMessage] = useState('');
+  const [placeholder, setPlaceholder] = useState('Type your message... (Shift+Enter for new line)');
+  const [selectedPlatforms, setSelectedPlatforms] = useState<Platform[]>([
+    'twitch',
+  ]);
+  const [emoteQuery, setEmoteQuery] = useState('');
+  const [emoteResults, setEmoteResults] = useState<Array<{ name: string; url: string; source: string }>>([]);
+  const [selectedEmoteIndex, setSelectedEmoteIndex] = useState(-1);
+  const [hasEmoteSelection, setHasEmoteSelection] = useState(false);
+  const [showEmoteMenu, setShowEmoteMenu] = useState(false);
+  const [showEmotePickerMenu, setShowEmotePickerMenu] = useState(false);
+  const [emotesOrganized, setEmotesOrganized] = useState<EmotesBySource>({
+    twitch: [],
+    '7tv': [],
+    bttv: [],
+    ffz: [],
+  });
+  const [usernameQuery, setUsernameQuery] = useState('');
+  const [usernameResults, setUsernameResults] = useState<string[]>([]);
+  const [selectedUsernameIndex, setSelectedUsernameIndex] = useState(-1);
+  const [showUsernameMenu, setShowUsernameMenu] = useState(false);
+  const [hasUsernameSelection, setHasUsernameSelection] = useState(false);
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+  const emoteMenuRef = useRef<HTMLDivElement>(null);
+  const shouldRefocusRef = useRef(false);
+
+
+  // Load organized emotes on component mount
+  useEffect(() => {
+    const organized = getAllEmotesOrganized();
+    setEmotesOrganized(organized);
+
+    // Listen for emotes-reloaded event
+    function handleEmotesReloaded() {
+      const updated = getAllEmotesOrganized();
+      setEmotesOrganized(updated);
+    }
+    window.addEventListener('emotes-reloaded', handleEmotesReloaded);
+    return () => {
+      window.removeEventListener('emotes-reloaded', handleEmotesReloaded);
+    };
+  }, []);
+
+  // Refresh emotes whenever the emote picker menu opens
+  useEffect(() => {
+    if (showEmotePickerMenu) {
+      const organized = getAllEmotesOrganized();
+      setEmotesOrganized(organized);
+    }
+  }, [showEmotePickerMenu]);
+
+  const handleMessageChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
+    const newMessage = e.target.value;
+    setMessage(newMessage);
+
+    // Get cursor position
+    const cursorPos = e.target.selectionStart;
+    const textBeforeCursor = newMessage.substring(0, cursorPos);
+
+    // Find the last word being typed (after space or at start)
+    const lastSpaceIndex = textBeforeCursor.lastIndexOf(' ');
+    const currentWord = textBeforeCursor.substring(lastSpaceIndex + 1);
+
+    // Check for @ mentions
+    if (currentWord.startsWith('@') && currentWord.length > 1) {
+      const query = currentWord.substring(1).toLowerCase();
+      const uniqueUsernames = new Set(chatMessages.map((msg) => msg.author));
+      const matching = Array.from(uniqueUsernames)
+        .filter((name) => name.toLowerCase().includes(query) && name.toLowerCase() !== currentUsername.toLowerCase())
+        .sort();
+
+      if (matching.length > 0) {
+        setUsernameQuery(query);
+        setUsernameResults(matching);
+        setSelectedUsernameIndex(-1);
+        setHasUsernameSelection(false);
+        setShowUsernameMenu(true);
+        setShowEmoteMenu(false);
+      } else {
+        setShowUsernameMenu(false);
+      }
+    }
+    // Show emote autocomplete if typing a word
+    else if (currentWord.length > 0 && !currentWord.startsWith('@')) {
+      const results = searchEmotes(currentWord);
+      if (results.length > 0) {
+        setEmoteQuery(currentWord);
+        setEmoteResults(results);
+        setSelectedEmoteIndex(-1);
+        setHasEmoteSelection(false);
+        setShowEmoteMenu(true);
+        setShowUsernameMenu(false);
+      } else {
+        setShowEmoteMenu(false);
+        setShowUsernameMenu(false);
+      }
+    } else {
+      setShowEmoteMenu(false);
+      setShowUsernameMenu(false);
+    }
+  };
+
+  const insertEmote = (emoteName: string) => {
+    if (!textareaRef.current) return;
+
+    const cursorPos = textareaRef.current.selectionStart;
+    const textBeforeCursor = message.substring(0, cursorPos);
+    const textAfterCursor = message.substring(cursorPos);
+
+    // If message is empty, just insert the emote with a space after
+    if (!textBeforeCursor.trim()) {
+      const newMessage = emoteName + ' ' + textAfterCursor;
+      setMessage(newMessage);
+      setShowEmoteMenu(false);
+      setShowEmotePickerMenu(false);
+      setHasEmoteSelection(false);
+
+      // Set cursor after the inserted emote
+      setTimeout(() => {
+        if (textareaRef.current) {
+          const newCursorPos = (emoteName + ' ').length;
+          textareaRef.current.selectionStart = newCursorPos;
+          textareaRef.current.selectionEnd = newCursorPos;
+          textareaRef.current.focus();
+        }
+      }, 0);
+      return;
+    }
+
+    // Find the start of the current word
+    const lastSpaceIndex = textBeforeCursor.lastIndexOf(' ');
+    const beforeWord = textBeforeCursor.substring(0, lastSpaceIndex + 1);
+
+    // Insert emote
+    const newMessage = beforeWord + emoteName + ' ' + textAfterCursor;
+    setMessage(newMessage);
+    setShowEmoteMenu(false);
+    setShowEmotePickerMenu(false);
+    setHasEmoteSelection(false);
+
+    // Set cursor after the inserted emote
+    setTimeout(() => {
+      if (textareaRef.current) {
+        const newCursorPos = (beforeWord + emoteName + ' ').length;
+        textareaRef.current.selectionStart = newCursorPos;
+        textareaRef.current.selectionEnd = newCursorPos;
+        textareaRef.current.focus();
+      }
+    }, 0);
+  };
+
+  const insertUsername = (username: string) => {
+    if (!textareaRef.current) return;
+
+    const cursorPos = textareaRef.current.selectionStart;
+    const textBeforeCursor = message.substring(0, cursorPos);
+    const textAfterCursor = message.substring(cursorPos);
+
+    // Find the start of the @ mention
+    const lastSpaceIndex = textBeforeCursor.lastIndexOf(' ');
+    const beforeMention = textBeforeCursor.substring(0, lastSpaceIndex + 1);
+
+    // Insert username with @
+    const newMessage = beforeMention + '@' + username + ' ' + textAfterCursor;
+    setMessage(newMessage);
+    setShowUsernameMenu(false);
+    setHasUsernameSelection(false);
+    setSelectedUsernameIndex(-1);
+
+    // Set cursor after the inserted username
+    setTimeout(() => {
+      if (textareaRef.current) {
+        const newCursorPos = (beforeMention + '@' + username + ' ').length;
+        textareaRef.current.selectionStart = newCursorPos;
+        textareaRef.current.selectionEnd = newCursorPos;
+        textareaRef.current.focus();
+      }
+    }, 0);
+  };
+
+  const handleSend = async () => {
+    if (!message.trim() || selectedPlatforms.length === 0) return;
+
+    try {
+      shouldRefocusRef.current = true;
+      await onSendMessage(message, selectedPlatforms, replyingTo?.id);
+      setMessage('');
+      setShowEmoteMenu(false);
+      setShowEmotePickerMenu(false);
+      if (onCancelReply) onCancelReply();
+    } catch (error) {
+      console.error('Failed to send message:', error);
+    }
+  };
+
+  const handleToggleEmotePicker = () => {
+    setShowEmotePickerMenu(!showEmotePickerMenu);
+  };
+
+  const handleKeyPress = (e: React.KeyboardEvent) => {
+    // If username menu is open, handle username navigation
+    if (showUsernameMenu) {
+      if (e.key === 'ArrowDown') {
+        e.preventDefault();
+        setSelectedUsernameIndex((prev) =>
+          prev < usernameResults.length - 1 ? prev + 1 : prev
+        );
+        setHasUsernameSelection(true);
+      } else if (e.key === 'ArrowUp') {
+        e.preventDefault();
+        setSelectedUsernameIndex((prev) => (prev > 0 ? prev - 1 : 0));
+        setHasUsernameSelection(true);
+      } else if (e.key === 'Enter') {
+        if (hasUsernameSelection && selectedUsernameIndex >= 0 && usernameResults[selectedUsernameIndex]) {
+          e.preventDefault();
+          insertUsername(usernameResults[selectedUsernameIndex]);
+        } else {
+          e.preventDefault();
+          setShowUsernameMenu(false);
+          handleSend();
+        }
+      } else if (e.key === 'Escape') {
+        e.preventDefault();
+        setShowUsernameMenu(false);
+        setSelectedUsernameIndex(-1);
+        setHasUsernameSelection(false);
+      } else if (e.key === 'Tab') {
+        if (hasUsernameSelection && selectedUsernameIndex >= 0 && usernameResults[selectedUsernameIndex]) {
+          e.preventDefault();
+          insertUsername(usernameResults[selectedUsernameIndex]);
+        }
+      }
+      return;
+    }
+
+    // If emote menu is open, handle emote navigation
+    if (showEmoteMenu) {
+      if (e.key === 'ArrowDown') {
+        e.preventDefault();
+        setSelectedEmoteIndex((prev) =>
+          prev < emoteResults.length - 1 ? prev + 1 : prev
+        );
+        setHasEmoteSelection(true);
+      } else if (e.key === 'ArrowUp') {
+        e.preventDefault();
+        setSelectedEmoteIndex((prev) => (prev > 0 ? prev - 1 : 0));
+        setHasEmoteSelection(true);
+      } else if (e.key === 'Enter') {
+        if (!e.shiftKey && hasEmoteSelection && emoteResults[selectedEmoteIndex]) {
+          e.preventDefault();
+          insertEmote(emoteResults[selectedEmoteIndex].name);
+        } else if (!e.shiftKey) {
+          e.preventDefault();
+          setShowEmoteMenu(false);
+          handleSend();
+        }
+      } else if (e.key === 'Escape') {
+        e.preventDefault();
+        setShowEmoteMenu(false);
+        setHasEmoteSelection(false);
+      } else if (e.key === 'Tab') {
+        if (hasEmoteSelection && emoteResults[selectedEmoteIndex]) {
+          e.preventDefault();
+          insertEmote(emoteResults[selectedEmoteIndex].name);
+        }
+      }
+      return;
+    }
+
+    // No menus open, just handle regular input
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      handleSend();
+    }
+  };
+
+  // Close menu when clicking outside
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (
+        emoteMenuRef.current &&
+        !emoteMenuRef.current.contains(event.target as Node) &&
+        textareaRef.current &&
+        !textareaRef.current.contains(event.target as Node)
+      ) {
+        setShowEmoteMenu(false);
+      }
+    };
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  // Refocus input after send completes
+  useEffect(() => {
+    if (!isLoading && shouldRefocusRef.current) {
+      shouldRefocusRef.current = false;
+      setTimeout(() => textareaRef.current?.focus(), 0);
+    }
+  }, [isLoading]);
+  // Scroll selected emote into view
+  useEffect(() => {
+    if (showEmoteMenu && emoteMenuRef.current) {
+      const selectedElement = emoteMenuRef.current.children[selectedEmoteIndex] as HTMLElement;
+      if (selectedElement) {
+        selectedElement.scrollIntoView({ block: 'nearest' });
+      }
+    }
+  }, [selectedEmoteIndex, showEmoteMenu]);
+
+  // Focus textarea when replying to a message
+  useEffect(() => {
+    if (replyingTo && textareaRef.current) {
+      textareaRef.current.focus();
+    }
+  }, [replyingTo]);
+
+  return (
+    <div className="message-input">
+      {replyingTo && (
+        <div className="reply-indicator" style={{
+          padding: '8px 12px',
+          background: '#0f172a',
+          borderRadius: '4px',
+          display: 'flex',
+          justifyContent: 'flex-end',
+          alignItems: 'center',
+          gap: '12px',
+        }}>
+          <div style={{ fontSize: '0.9rem', color: '#94a3b8' }}>
+            <span style={{ fontWeight: 'bold' }}>Replying to @{replyingTo.author}</span>
+            <span style={{ marginLeft: '8px', fontStyle: 'italic' }}>
+              {replyingTo.content.substring(0, 50)}{replyingTo.content.length > 50 ? '...' : ''}
+            </span>
+          </div>
+          {onCancelReply && (
+            <button
+              onClick={onCancelReply}
+              style={{
+                background: 'transparent',
+                border: 'none',
+                color: '#94a3b8',
+                cursor: 'pointer',
+                padding: '0 8px',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+              }}
+              title="Cancel reply"
+            >
+              <FaTimes size={16} />
+            </button>
+          )}
+        </div>
+      )}
+      <div className="input-group" style={{ position: 'relative' }}>
+        <button
+          onClick={handleToggleEmotePicker}
+          disabled={selectedPlatforms.length === 0 || isLoading}
+          className="emote-picker-button"
+          title="Browse emotes"
+        >
+          <FaSmile size={18} />
+        </button>
+        <textarea
+          ref={textareaRef}
+          value={message}
+          onChange={handleMessageChange}
+          onKeyDown={handleKeyPress}
+          placeholder={placeholder}
+          disabled={selectedPlatforms.length === 0 || isLoading}
+          className="message-textarea twitch"
+          autoComplete="off"
+        />
+        <button
+          onClick={handleSend}
+          disabled={
+            !message.trim() ||
+            selectedPlatforms.length === 0 ||
+            isLoading
+          }
+          className="send-button"
+        >
+          {isLoading ? '...' : <FaTwitch size={16} />}
+        </button>
+
+        {showEmoteMenu && emoteResults.length > 0 && (
+          <div
+            ref={emoteMenuRef}
+            style={{
+              position: 'absolute',
+              bottom: '100%',
+              left: 0,
+              right: 0,
+              maxHeight: '300px',
+              overflowY: 'auto',
+              background: '#1e293b',
+              border: '1px solid #475569',
+              borderRadius: '8px',
+              marginBottom: '8px',
+              zIndex: 1000,
+            }}
+          >
+            {emoteResults.map((emote, index) => (
+              <div
+                key={`${emote.source}-${emote.name}`}
+                onClick={() => insertEmote(emote.name)}
+                style={{
+                  display: 'flex',
+                  alignItems: 'center',
+                  gap: '12px',
+                  padding: '8px 12px',
+                  cursor: 'pointer',
+                  background: index === selectedEmoteIndex ? '#334155' : 'transparent',
+                  transition: 'background 0.15s',
+                }}
+                onMouseEnter={() => setSelectedEmoteIndex(index)}
+              >
+                <img
+                  src={emote.url}
+                  alt={emote.name}
+                  style={{
+                    width: '32px',
+                    height: '32px',
+                    objectFit: 'contain',
+                  }}
+                />
+                <div style={{ display: 'flex', flexDirection: 'column', gap: '2px' }}>
+                  <span style={{ color: '#e2e8f0', fontWeight: '500' }}>{emote.name}</span>
+                  <span style={{ color: '#94a3b8', fontSize: '0.75rem' }}>{emote.source}</span>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+
+        {showUsernameMenu && usernameResults.length > 0 && (
+          <div
+            style={{
+              position: 'absolute',
+              bottom: '100%',
+              left: 0,
+              right: 0,
+              maxHeight: '250px',
+              overflowY: 'auto',
+              background: '#1e293b',
+              border: '1px solid #475569',
+              borderRadius: '8px',
+              marginBottom: '8px',
+              zIndex: 1000,
+            }}
+          >
+            {usernameResults.map((username, index) => (
+              <div
+                key={username}
+                onClick={() => insertUsername(username)}
+                style={{
+                  padding: '8px 12px',
+                  cursor: 'pointer',
+                  background: hasUsernameSelection && index === selectedUsernameIndex ? '#334155' : 'transparent',
+                  transition: 'background 0.15s',
+                  color: '#e2e8f0',
+                  fontSize: '0.95rem',
+                }}
+                onMouseEnter={() => {
+                  setSelectedUsernameIndex(index);
+                  setHasUsernameSelection(true);
+                }}
+              >
+                @{username}
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+
+      <EmoteMenu
+        emotes={emotesOrganized}
+        onSelectEmote={insertEmote}
+        isOpen={showEmotePickerMenu}
+        onClose={() => setShowEmotePickerMenu(false)}
+      />
+
+      {selectedPlatforms.length === 0 && (
+        <div className="warning">
+          Select at least one platform to send messages
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default memo(MessageInput);

src/components/Notification.tsx

@@ -0,0 +1,34 @@
+import React, { useState, useEffect } from 'react';
+
+interface NotificationProps {
+  message: string;
+  type?: 'success' | 'error' | 'info';
+  duration?: number;
+  onClose?: () => void;
+}
+
+export default function Notification({
+  message,
+  type = 'info',
+  duration = 3000,
+  onClose,
+}: NotificationProps) {
+  const [isVisible, setIsVisible] = useState(true);
+
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      setIsVisible(false);
+      onClose?.();
+    }, duration);
+
+    return () => clearTimeout(timer);
+  }, [duration]);
+
+  if (!isVisible) return null;
+
+  return (
+    <div className={`notification notification-${type}`}>
+      <span>{message}</span>
+    </div>
+  );
+}

src/components/StreamEmbed.tsx

@@ -0,0 +1,257 @@
+import React, { useState, useEffect, useRef } from 'react';
+import HLS from 'hls.js';
+
+interface StreamEmbedProps {
+  channelName: string;
+  playerType?: 'embed' | 'm3u8';
+  twitchConnected?: boolean;
+  onTwitchLogin?: () => void;
+}
+
+export default function StreamEmbed({ channelName, playerType = 'embed', twitchConnected, onTwitchLogin }: StreamEmbedProps) {
+  const videoRef = useRef<HTMLVideoElement>(null);
+  const hlsRef = useRef<HLS | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [parentDomain, setParentDomain] = useState<string>('localhost');
+
+  useEffect(() => {
+    fetch('/api/parent-domain')
+      .then(res => res.json())
+      .then(data => setParentDomain(data.parentDomain))
+      .catch(() => setParentDomain('localhost'));
+  }, []);
+
+  // No longer forcing iframe remount on channel switch to help preserve session state.
+  // The browser will handle navigating the existing iframe to the new URL.
+
+  useEffect(() => {
+    if (playerType === 'embed' || !channelName) {
+      setLoading(false);
+      return;
+    }
+
+    const loadStream = async () => {
+      try {
+        setLoading(true);
+        setError(null);
+
+        if (!videoRef.current) return;
+
+        // Clean up previous HLS instance
+        if (hlsRef.current) {
+          hlsRef.current.destroy();
+          hlsRef.current = null;
+        }
+
+        // /api/stream-playlist handles the full server-side proxy chain:
+        //   Twitch GQL (token) → usher.ttvnw.net (master) → best variant →
+        //   rewrite segment URLs to /api/stream-segment
+        // This avoids all browser CORS issues and IP-mismatch 403s.
+        const playlistUrl = `/api/stream-playlist?channel=${encodeURIComponent(channelName)}`;
+
+        if (HLS.isSupported()) {
+          const hls = new HLS({
+            debug: false,
+            enableWorker: true,
+            lowLatencyMode: true,
+            // Re-fetch the live playlist frequently
+            liveSyncDurationCount: 3,
+            liveMaxLatencyDurationCount: 6,
+          });
+
+          hls.on(HLS.Events.MANIFEST_PARSED, () => {
+            setLoading(false);
+            videoRef.current?.play().catch(() => {
+              // Auto-play failed — user will need to click play
+            });
+          });
+
+          hls.on(HLS.Events.ERROR, (event, data) => {
+            if (data.fatal) {
+              setError(`Stream error: ${data.type}`);
+              setLoading(false);
+            }
+          });
+
+          hls.loadSource(playlistUrl);
+          hls.attachMedia(videoRef.current);
+          hlsRef.current = hls;
+        } else if (videoRef.current.canPlayType('application/vnd.apple.mpegurl')) {
+          // Safari supports HLS natively
+          videoRef.current.src = playlistUrl;
+          setLoading(false);
+        } else {
+          setError('HLS not supported in this browser');
+          setLoading(false);
+        }
+      } catch (err) {
+        console.error('Failed to load stream:', err);
+        setError(err instanceof Error ? err.message : 'Failed to load stream');
+        setLoading(false);
+      }
+    };
+
+    loadStream();
+
+    return () => {
+      if (hlsRef.current) {
+        hlsRef.current.destroy();
+        hlsRef.current = null;
+      }
+    };
+  }, [channelName, playerType]);
+
+
+  if (!channelName) {
+    // If user is not logged in, show logo + Login with Twitch button
+    if (!twitchConnected) {
+      return (
+        <div
+          style={{
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            height: '100%',
+            backgroundColor: '#0a0a0a',
+            color: '#999',
+            fontSize: '14px',
+            flexDirection: 'column',
+            gap: '12px',
+          }}
+        >
+          <img src="/logo.png" alt="Mixchat" style={{ height: 115 }} />
+          <button
+            onClick={() => onTwitchLogin && onTwitchLogin()}
+            style={{
+              backgroundColor: '#6441a5',
+              color: '#fff',
+              border: 'none',
+              padding: '8px 12px',
+              borderRadius: '6px',
+              cursor: 'pointer',
+            }}
+          >
+            Login with Twitch
+          </button>
+        </div>
+      );
+    }
+
+    return (
+      <div
+        style={{
+          display: 'flex',
+          alignItems: 'center',
+          justifyContent: 'center',
+          height: '100%',
+          backgroundColor: '#0a0a0a',
+          color: '#999',
+          fontSize: '14px',
+        }}
+      >
+        Select a channel to view stream
+      </div>
+    );
+  }
+
+  // Embed mode
+  if (playerType === 'embed') {
+    return (
+      <div style={{ position: 'relative', width: '100%', height: '100%' }}>
+        <iframe
+          src={`https://embed.twitch.tv/?channel=${channelName}&parent=${parentDomain}&layout=video&autoplay=true`}
+          style={{
+            position: 'absolute',
+            top: 0,
+            left: 0,
+            width: '100%',
+            height: '100%',
+            border: 'none',
+            display: 'block',
+            visibility: 'visible',
+          }}
+          frameBorder="0"
+          scrolling="no"
+          allowFullScreen={true}
+          title={`${channelName} Twitch Stream`}
+          allow="autoplay; fullscreen; encrypted-media; picture-in-picture"
+        />
+      </div>
+    );
+  }
+
+  // M3U8 mode — error state
+  if (error) {
+    return (
+      <div
+        style={{
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center',
+          justifyContent: 'center',
+          height: '100%',
+          backgroundColor: '#0a0a0a',
+          color: '#ff4444',
+          fontSize: '14px',
+          gap: '8px',
+          padding: '16px',
+          textAlign: 'center',
+        }}
+      >
+        <div>⚠️ {error}</div>
+        <div style={{ fontSize: '12px', color: '#666' }}>The stream may be offline or unavailable</div>
+      </div>
+    );
+  }
+
+  // M3U8 mode — video player
+  return (
+    <div style={{ height: '100%', width: '100%', backgroundColor: '#0a0a0a', position: 'relative' }}>
+      <video
+        ref={videoRef}
+        controls
+        style={{
+          width: '100%',
+          height: '100%',
+          display: 'block',
+          backgroundColor: '#0a0a0a',
+        }}
+        title={`${channelName} Twitch Stream`}
+      />
+      {loading && (
+        <div
+          style={{
+            position: 'absolute',
+            top: '50%',
+            left: '50%',
+            transform: 'translate(-50%, -50%)',
+            color: '#999',
+            fontSize: '14px',
+            display: 'flex',
+            flexDirection: 'column',
+            alignItems: 'center',
+            gap: '8px',
+          }}
+        >
+          <div
+            style={{
+              width: '30px',
+              height: '30px',
+              border: '3px solid #333',
+              borderTop: '3px solid #6366f1',
+              borderRadius: '50%',
+              animation: 'spin 1s linear infinite',
+            }}
+          />
+          <div>Loading stream...</div>
+          <style>{`
+            @keyframes spin {
+              to { transform: rotate(360deg); }
+            }
+          `}</style>
+        </div>
+      )}
+    </div>
+  );
+}

src/components/UnifiedChat.tsx

@@ -0,0 +1,506 @@
+import React, { useEffect, useRef, useState, useCallback, memo } from 'react';
+import { MdStars, MdAutorenew, MdCardGiftcard, MdReply, MdContentCopy } from 'react-icons/md';
+import { GiHeartBeats } from 'react-icons/gi';
+import { FaTwitch, FaYoutube } from 'react-icons/fa';
+import type { ChatMessage } from '../lib/types';
+import { parseMessageWithEmotes } from '../lib/emotes';
+import '../styles/UnifiedChat.css';
+
+// YouTube message shape — mirrors what YouTubeChat.tsx uses internally
+interface MessagePart {
+    type: 'text' | 'emoji';
+    text?: string;
+    url?: string;
+    alt?: string;
+    emojiText?: string;
+    isCustomEmoji?: boolean;
+}
+
+export interface YTMessage {
+    id: string;
+    author: string;
+    authorAvatar?: string;
+    badges?: Record<string, string>;
+    parts: MessagePart[];
+    timestamp: Date;
+    authorChannelId?: string;
+    superchat?: {
+        amount: string;
+        color: string;
+        sticker?: {
+            url: string;
+            alt: string;
+        };
+    };
+}
+
+// A single entry in the merged list, tagged with its platform source
+type UnifiedEntry =
+    | { source: 'twitch'; msg: ChatMessage }
+    | { source: 'youtube'; msg: YTMessage };
+
+function getKey(e: UnifiedEntry) {
+    return e.source + ':' + e.msg.id;
+}
+
+function getTime(e: UnifiedEntry) {
+    return e.msg.timestamp instanceof Date
+        ? e.msg.timestamp.getTime()
+        : new Date(e.msg.timestamp).getTime();
+}
+
+// Generates a consistent color from a username, same algorithm used in YouTubeChat
+function getColorFromName(name: string): string {
+    let hash = 0;
+    for (let i = 0; i < name.length; i++) {
+        hash = ((hash << 5) - hash) + name.charCodeAt(i);
+        hash = hash & hash;
+    }
+    const hue = Math.abs(hash) % 360;
+    return `hsl(${hue}, 70%, 55%)`;
+}
+
+interface UnifiedChatProps {
+    twitchMessages: ChatMessage[];
+    ytMessages: YTMessage[];
+    onReply?: (message: ChatMessage) => void;
+    onCopyMessage?: () => void;
+    currentUserDisplayName?: string;
+    fontSize?: number;
+}
+
+const MAX_MESSAGES = 300;
+
+function UnifiedChat({
+    twitchMessages,
+    ytMessages,
+    onReply,
+    onCopyMessage,
+    currentUserDisplayName,
+    fontSize = 14,
+}: UnifiedChatProps) {
+    const containerRef = useRef<HTMLDivElement>(null);
+    const [isAtBottom, setIsAtBottom] = useState(true);
+    const [newMessagesCount, setNewMessagesCount] = useState(0);
+    const prevCountRef = useRef(0);
+
+    // Merge Twitch and YouTube messages into one list sorted by time
+    const entries: UnifiedEntry[] = React.useMemo(() => {
+        const tw: UnifiedEntry[] = twitchMessages.map((m) => ({ source: 'twitch' as const, msg: m }));
+        const yt: UnifiedEntry[] = ytMessages.map((m) => ({ source: 'youtube' as const, msg: m }));
+        const merged = [...tw, ...yt].sort((a, b) => getTime(a) - getTime(b));
+        return merged.length > MAX_MESSAGES ? merged.slice(-MAX_MESSAGES) : merged;
+    }, [twitchMessages, ytMessages]);
+
+    // Scroll to the bottom whenever new messages arrive (only if already at bottom)
+    useEffect(() => {
+        if (containerRef.current && isAtBottom) {
+            containerRef.current.scrollTop = containerRef.current.scrollHeight;
+        }
+    }, [entries, isAtBottom]);
+
+    // Track whether the user has scrolled away from the bottom
+    useEffect(() => {
+        const el = containerRef.current;
+        if (!el) return;
+
+        const handleScroll = () => {
+            const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 50;
+            setIsAtBottom(atBottom);
+            if (atBottom) {
+                setNewMessagesCount(0);
+                prevCountRef.current = entries.length;
+            }
+        };
+
+        el.addEventListener('scroll', handleScroll);
+        return () => el.removeEventListener('scroll', handleScroll);
+    }, [entries.length]);
+
+    useEffect(() => {
+        if (!isAtBottom) {
+            const diff = entries.length - prevCountRef.current;
+            if (diff > 0) setNewMessagesCount((p) => p + diff);
+        } else {
+            prevCountRef.current = entries.length;
+        }
+    }, [entries.length, isAtBottom]);
+
+    useEffect(() => {
+        if (!isAtBottom) {
+            const diff = entries.length - prevCountRef.current;
+            if (diff > 0) setNewMessagesCount((p) => p + diff);
+        } else {
+            prevCountRef.current = entries.length;
+        }
+    }, [entries.length, isAtBottom]);
+
+    // Handle emote tooltip on hover
+    useEffect(() => {
+        const handleEmoteHover = (e: Event) => {
+            const target = e.target as HTMLImageElement;
+
+            if (!target.classList.contains('chat-emote')) return;
+            // console.log('Emote hovered:', target.getAttribute('data-emote-name'));
+
+            if (e.type === 'mouseenter') {
+                const tooltipUrl = target.getAttribute('data-tooltip-url');
+                const emoteName = target.getAttribute('data-emote-name') || 'Emote';
+
+                if (tooltipUrl) {
+                    const tooltip = document.createElement('div');
+                    tooltip.className = 'chat-emote-tooltip';
+                    tooltip.id = 'emote-tooltip';
+
+                    const img = document.createElement('img');
+                    img.src = tooltipUrl;
+                    img.alt = emoteName;
+                    tooltip.appendChild(img);
+
+                    const nameDiv = document.createElement('div');
+                    nameDiv.className = 'chat-emote-tooltip-name';
+                    nameDiv.textContent = emoteName;
+                    tooltip.appendChild(nameDiv);
+
+                    document.body.appendChild(tooltip);
+
+                    // Position tooltip near the mouse
+                    const rect = target.getBoundingClientRect();
+                    tooltip.style.left = (rect.left + window.scrollX) + 'px';
+                    tooltip.style.top = (rect.top + window.scrollY - tooltip.offsetHeight - 10) + 'px';
+                }
+            } else if (e.type === 'mouseleave') {
+                const tooltip = document.getElementById('emote-tooltip');
+                if (tooltip) {
+                    tooltip.remove();
+                }
+            }
+        };
+
+        const messagesContainer = containerRef.current;
+        if (messagesContainer) {
+            messagesContainer.addEventListener('mouseenter', handleEmoteHover, true);
+            messagesContainer.addEventListener('mouseleave', handleEmoteHover, true);
+        }
+
+        return () => {
+            if (messagesContainer) {
+                messagesContainer.removeEventListener('mouseenter', handleEmoteHover, true);
+                messagesContainer.removeEventListener('mouseleave', handleEmoteHover, true);
+            }
+            // Cleanup tooltip if it exists when component unmounts
+            const tooltip = document.getElementById('emote-tooltip');
+            if (tooltip) tooltip.remove();
+        };
+    }, []);
+
+    // Small platform icon rendered before the username
+    const PlatformTag = ({ source }: { source: 'twitch' | 'youtube' }) => (
+        <span
+            title={source === 'twitch' ? "Twitch" : "YouTube"}
+            className={`platform-tag ${source}`}
+        >
+            {source === 'twitch' ? <FaTwitch size={12} /> : <FaYoutube size={12} />}
+        </span>
+    );
+
+    // Helpers for Twitch-specific UI elements (event icons, badges)
+    const renderTwitchIcon = (msg: ChatMessage) => {
+        if (!msg.messageType) return null;
+        const iconConfig: Record<string, { title: string; color: string }> = {
+            cheer: { title: 'Cheer', color: '#FFB700' },
+            subscription: { title: 'Subscription', color: '#9147FF' },
+            resub: { title: 'Resub', color: '#9147FF' },
+            subgift: { title: 'Subgift', color: '#9147FF' },
+        };
+        const cfg = iconConfig[msg.messageType];
+        if (!cfg) return null;
+
+        let icon;
+        switch (msg.messageType) {
+            case 'cheer': icon = <GiHeartBeats size={14} />; break;
+            case 'subscription': icon = <MdStars size={14} />; break;
+            case 'resub': icon = <MdAutorenew size={14} />; break;
+            case 'subgift': icon = <MdCardGiftcard size={14} />; break;
+            default: return null;
+        }
+        return (
+            <span
+                title={cfg.title}
+                className="twitch-event-icon"
+                style={{ color: cfg.color, filter: `drop-shadow(0 0 2px ${cfg.color})` }}
+            >
+                {icon}
+            </span>
+        );
+    };
+
+    const renderTwitchBadges = (msg: ChatMessage) => {
+        // Prefer detailed badge info if available (contains titles/descriptions)
+        if (msg.badgeDetails && Object.keys(msg.badgeDetails).length > 0) {
+            return (
+                <div className="message-badges" style={{ display: 'flex', alignItems: 'center', marginRight: '4px', gap: '2px' }}>
+                    {Object.entries(msg.badgeDetails).map(([name, detail]) => (
+                        <img
+                            key={name}
+                            src={detail.url}
+                            alt={detail.title}
+                            className="badge"
+                            title={detail.title}
+                            loading="eager"
+                            style={{
+                                width: '18px',
+                                height: '18px',
+                                verticalAlign: 'middle'
+                            }}
+                        />
+                    ))}
+                </div>
+            );
+        }
+
+        // Fallback for platform-agnostic or historical badges
+        if (!msg.badges || Object.keys(msg.badges).length === 0) return null;
+
+        return (
+            <div className="message-badges" style={{ display: 'flex', alignItems: 'center', marginRight: '4px', gap: '2px' }}>
+                {Object.entries(msg.badges).map(([name, url]) => {
+                    if (!url) return null;
+                    return (
+                        <img key={name} src={url} alt={name} className="badge" title={name} loading="eager"
+                            style={{ width: '18px', height: '18px', verticalAlign: 'middle' }} />
+                    );
+                })}
+            </div>
+        );
+    };
+
+    const renderYTBadges = (msg: YTMessage) => {
+        if (!msg.badges || Object.keys(msg.badges).length === 0) return null;
+        return (
+            <div className="message-badges" style={{ display: 'flex', alignItems: 'center', marginRight: '4px', gap: '2px' }}>
+                {Object.entries(msg.badges).map(([name, url]) => (
+                    <img key={name} src={url} alt={name} className="badge" title={name}
+                        style={{ width: '18px', height: '18px', verticalAlign: 'middle' }} />
+                ))}
+            </div>
+        );
+    };
+
+    // Render the scrollable message list with an optional "new messages" button
+    return (
+        <div className="unified-chat-wrapper">
+            <div
+                ref={containerRef}
+                className="messages-container unified-messages-container"
+                style={{ '--chat-font-size': `${fontSize}px` } as React.CSSProperties}
+            >
+                {entries.length === 0 && (
+                    <div className="no-messages">
+                        <p>No messages yet. Start chatting!</p>
+                    </div>
+                )}
+
+                {entries.map((entry) => {
+                    if (entry.source === 'twitch') {
+                        const msg = entry.msg as ChatMessage;
+                        const isMentioned = currentUserDisplayName && msg.content.includes(currentUserDisplayName);
+                        const messageClasses = [
+                            'message',
+                            msg.messageType,
+                            msg.isPreloaded ? 'preloaded' : '',
+                            msg.isBot ? 'bot' : '',
+                            ((msg.mentionsUser || isMentioned) && !msg.isBot) ? 'mention' : ''
+                        ].filter(Boolean).join(' ');
+
+
+                        return (
+                            <div key={getKey(entry)} className={messageClasses}>
+                                {msg.replyTo && (
+                                    <div className="reply-info">
+                                        <span>
+                                            response to{' '}
+                                            <span style={{ color: '#94a3b8' }}>@{msg.replyTo.author}</span>
+                                            {msg.replyTo.content && (
+                                                <>
+                                                    {': '}
+                                                    <span
+                                                        className="reply-target-content"
+                                                        dangerouslySetInnerHTML={{
+                                                            __html: parseMessageWithEmotes(msg.replyTo.content)
+                                                        }}
+                                                    />
+                                                </>
+                                            )}
+                                        </span>
+                                    </div>
+                                )}
+                                <div className="message-single-line">
+                                    <span className="timestamp">{msg.timestamp.toLocaleTimeString()}</span>
+                                    <PlatformTag source="twitch" />
+                                    {msg.authorAvatar && <img src={msg.authorAvatar} alt={msg.author} className="avatar" />}
+
+                                    {renderTwitchIcon(msg)}
+                                    {renderTwitchBadges(msg)}
+                                    <a
+                                        href={`https://twitch.tv/${msg.author}`}
+                                        target="_blank"
+                                        rel="noopener noreferrer"
+                                        className={`author author-link ${msg.isCurrentUser ? 'self' : ''}`}
+                                        style={{
+                                            color: msg.isCurrentUser ? '#ffffff' : (msg.authorColor || '#e2e8f0'),
+                                        }}
+                                    >
+                                        {msg.author}
+                                    </a>
+                                    <span className="message-separator">:</span>
+                                    <span
+                                        className="message-text"
+                                        dangerouslySetInnerHTML={{ __html: parseMessageWithEmotes(msg.content, msg.emotes) }}
+                                    />
+                                    <div className="message-actions">
+                                        {onReply && (
+                                            <button onClick={() => onReply(msg)} className="action-button" title="Reply to this message" style={{ display: 'flex', alignItems: 'center', gap: '4px' }}>
+                                                <MdReply size={12} />
+                                            </button>
+                                        )}
+                                        <button
+                                            onClick={() => {
+                                                if (navigator.clipboard) {
+                                                    navigator.clipboard.writeText(msg.content).then(() => onCopyMessage?.()).catch(() => { });
+                                                }
+                                            }}
+                                            className="action-button" title="Copy message" style={{ display: 'flex', alignItems: 'center', gap: '4px' }}
+                                        >
+                                            <MdContentCopy size={12} />
+                                        </button>
+                                    </div>
+                                </div>
+                            </div>
+                        );
+                    }
+
+                    // YouTube message
+                    const msg = entry.msg as YTMessage;
+                    if (msg.superchat) {
+                        return (
+                            <div key={getKey(entry)} className="yt-superchat" style={{ backgroundColor: msg.superchat.color }}>
+                                <div className="yt-superchat-header">
+                                    {msg.authorAvatar && (
+                                        <img src={msg.authorAvatar} alt={msg.author} className="avatar" />
+                                    )}
+                                    <div className="yt-superchat-info">
+                                        <div className="yt-superchat-author">{msg.author}</div>
+                                        <div className="yt-superchat-amount">{msg.superchat.amount}</div>
+                                    </div>
+                                </div>
+                                {(msg.parts.length > 0 || msg.superchat.sticker) && (
+                                    <div className="yt-superchat-body">
+                                        {msg.parts.map((part, i) =>
+                                            part.type === 'emoji' ? (
+                                                <img
+                                                    key={i}
+                                                    src={part.url}
+                                                    alt={part.alt || part.emojiText || '🙂'}
+                                                    title={part.emojiText || part.alt}
+                                                    className="chat-emote"
+                                                    data-tooltip-url={part.url}
+                                                    data-emote-name={part.alt || part.emojiText || 'Emoji'}
+                                                    style={{
+                                                        width: part.isCustomEmoji ? '28px' : '18px',
+                                                        height: part.isCustomEmoji ? '28px' : '18px',
+                                                        verticalAlign: 'middle',
+                                                        margin: '0 1px',
+                                                        objectFit: 'contain',
+                                                        cursor: 'pointer',
+                                                    }}
+                                                />
+                                            ) : (
+                                                <React.Fragment key={i}>{part.text}</React.Fragment>
+                                            )
+                                        )}
+                                        {msg.superchat.sticker && (
+                                            <img
+                                                src={msg.superchat.sticker.url}
+                                                alt={msg.superchat.sticker.alt}
+                                                className="yt-superchat-sticker"
+                                                style={{ width: '72px', height: '72px', marginTop: '4px', objectFit: 'contain' }}
+                                            />
+                                        )}
+                                    </div>
+                                )}
+                            </div>
+                        );
+                    }
+
+                    return (
+                        <div key={getKey(entry)} className="message">
+                            <div className="message-single-line">
+                                <span className="timestamp">
+                                    {(msg.timestamp instanceof Date ? msg.timestamp : new Date(msg.timestamp))
+                                        .toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', second: '2-digit' })}
+                                </span>
+                                <PlatformTag source="youtube" />
+                                {msg.authorAvatar && (
+                                    <img src={msg.authorAvatar} alt={msg.author} className="avatar" />
+                                )}
+
+                                {renderYTBadges(msg)}
+                                <span className="author" style={{ color: getColorFromName(msg.author) }}>
+                                    {msg.author}
+                                </span>
+                                <span className="message-separator">:</span>
+                                <span className="message-text">
+                                    {msg.parts.map((part, i) =>
+                                        part.type === 'emoji' ? (
+                                            <img
+                                                key={i}
+                                                src={part.url}
+                                                alt={part.alt || part.emojiText || '🙂'}
+                                                title={part.emojiText || part.alt}
+                                                className="chat-emote"
+                                                data-tooltip-url={part.url}
+                                                data-emote-name={part.alt || part.emojiText || 'Emoji'}
+                                                style={{
+                                                    width: part.isCustomEmoji ? '28px' : '18px',
+                                                    height: part.isCustomEmoji ? '28px' : '18px',
+                                                    verticalAlign: 'middle',
+                                                    margin: '0 1px',
+                                                    objectFit: 'contain',
+                                                    cursor: 'pointer',
+                                                }}
+                                            />
+                                        ) : (
+                                            <React.Fragment key={i}>{part.text}</React.Fragment>
+                                        )
+                                    )}
+                                </span>
+                            </div>
+                        </div>
+                    );
+                })}
+            </div>
+
+            {/* Scroll-to-bottom button */}
+            {!isAtBottom && (
+                <button
+                    className="go-to-bottom-button"
+                    title="Go to latest messages"
+                    onClick={() => {
+                        if (containerRef.current) {
+                            containerRef.current.scrollTop = containerRef.current.scrollHeight;
+                            setIsAtBottom(true);
+                            setNewMessagesCount(0);
+                            prevCountRef.current = entries.length;
+                        }
+                    }}
+                >
+                    {newMessagesCount > 0 ? `New Messages (${newMessagesCount})` : 'New Messages'}
+                </button>
+            )}
+        </div>
+    );
+
+}
+
+export default memo(UnifiedChat);

src/components/WatchlistManager.tsx

@@ -0,0 +1,154 @@
+import React, { useState, useEffect } from 'react';
+import { FaPlus, FaTrash, FaEye } from 'react-icons/fa';
+import {
+  getWatchedStreamers,
+  addWatchedStreamer,
+  removeWatchedStreamer,
+} from '../lib/streamMonitor';
+import type { TwitchChannel } from '../components/AppContainer';
+import '../styles/WatchlistManager.css';
+
+interface WatchlistManagerProps {
+  availableChannels: TwitchChannel[];
+  onClose: () => void;
+}
+
+export default function WatchlistManager({ availableChannels, onClose }: WatchlistManagerProps) {
+  const [watchedStreamers, setWatchedStreamers] = useState(getWatchedStreamers());
+  const [selectedChannelId, setSelectedChannelId] = useState<string>('');
+  const [searchQuery, setSearchQuery] = useState<string>('');
+
+  const handleAddStreamer = () => {
+    if (!selectedChannelId) return;
+
+    const channel = availableChannels.find((c) => c.id === selectedChannelId);
+    if (channel) {
+      addWatchedStreamer({
+        id: channel.id,
+        name: channel.name,
+        displayName: channel.displayName,
+        profileImageUrl: channel.profileImageUrl,
+      });
+      setWatchedStreamers(getWatchedStreamers());
+      setSelectedChannelId('');
+      setSearchQuery('');
+    }
+  };
+
+  const handleRemoveStreamer = (streamerId: string) => {
+    removeWatchedStreamer(streamerId);
+    setWatchedStreamers(getWatchedStreamers());
+  };
+
+  const isAlreadyWatched = (channelId: string) =>
+    watchedStreamers.some((s) => s.id === channelId);
+
+  const unwatchedChannels = availableChannels.filter(
+    (c) => !isAlreadyWatched(c.id)
+  );
+
+  const filteredChannels = searchQuery.trim() === ''
+    ? unwatchedChannels
+    : unwatchedChannels.filter((c) =>
+      c.displayName.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      c.name.toLowerCase().includes(searchQuery.toLowerCase())
+    );
+
+  return (
+    <div className="watchlist-manager-overlay" onClick={onClose}>
+      <div className="watchlist-manager" onClick={(e) => e.stopPropagation()}>
+        <h2>Manage Notification Streams</h2>
+        <p className="subtitle">Get notifications when these streamers go live</p>
+
+        <div className="watchlist-add-section">
+          <input
+            type="text"
+            placeholder="Search channels..."
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            className="channel-search"
+          />
+          <div className="channel-list-dropdown">
+            {filteredChannels.length === 0 ? (
+              <div className="no-channels-message">
+                {searchQuery ? 'No channels match your search' : 'All followed channels are already being watched'}
+              </div>
+            ) : (
+              filteredChannels.map((channel) => (
+                <button
+                  key={channel.id}
+                  className="channel-list-item"
+                  onClick={() => {
+                    setSelectedChannelId(channel.id);
+                    setSearchQuery('');
+                  }}
+                >
+                  {channel.profileImageUrl && (
+                    <img src={channel.profileImageUrl} alt="" className="channel-thumb" />
+                  )}
+                  <div className="channel-info">
+                    <div className="channel-display-name">{channel.displayName}</div>
+                    <div className="channel-username">@{channel.name}</div>
+                  </div>
+                </button>
+              ))
+            )}
+          </div>
+          {selectedChannelId && (
+            <div className="selected-channel-display">
+              {unwatchedChannels.find((c) => c.id === selectedChannelId)?.displayName}
+            </div>
+          )}
+          <button
+            className="add-button"
+            onClick={handleAddStreamer}
+            disabled={!selectedChannelId}
+          >
+            <FaPlus /> Add
+          </button>
+        </div>
+
+        <div className="watchlist-items">
+          {watchedStreamers.length === 0 ? (
+            <p className="empty-message">No streamers being watched yet</p>
+          ) : (
+            watchedStreamers.map((streamer) => (
+              <div key={streamer.id} className="watchlist-item">
+                <div className="item-info">
+                  {streamer.profileImageUrl && (
+                    <img
+                      src={streamer.profileImageUrl}
+                      alt={streamer.displayName}
+                      className="item-avatar"
+                    />
+                  )}
+                  <div className="item-details">
+                    <div className="item-name">{streamer.displayName}</div>
+                    <div className="item-username">@{streamer.name}</div>
+                  </div>
+                </div>
+                <button
+                  className="remove-button"
+                  onClick={() => handleRemoveStreamer(streamer.id)}
+                  title="Remove from watchlist"
+                >
+                  <FaTrash />
+                </button>
+              </div>
+            ))
+          )}
+        </div>
+
+        <div className="watchlist-footer">
+          <p className="info-text">
+            <FaEye style={{ marginRight: '6px' }} />
+            You'll be notified once per session when each streamer goes live
+          </p>
+          <button className="close-button" onClick={onClose}>
+            Close
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/YouTubeChat.tsx

@@ -0,0 +1,305 @@
+import React, { useEffect, useRef, useState } from 'react';
+import type { PlatformSession } from '../lib/types';
+import { AiOutlineLoading3Quarters } from 'react-icons/ai';
+
+interface YouTubeEmote {
+  /** The emojiText code e.g. ":slightly_smiling_face:" or the alt text */
+  name: string;
+  url: string;
+  isCustom: boolean;
+}
+
+interface YouTubeChatProps {
+  videoId: string;
+  accessToken: string;
+  session: PlatformSession;
+  /** Called whenever new emotes are discovered in the chat stream */
+  onEmotesDiscovered?: (emotes: YouTubeEmote[]) => void;
+  /** Called whenever the message list updates (for unified chat mode) */
+  onMessages?: (messages: ChatMessage[]) => void;
+  fontSize?: number;
+}
+
+export type { YouTubeEmote };
+
+interface MessagePart {
+  type: 'text' | 'emoji';
+  text?: string;
+  url?: string;
+  alt?: string;
+  emojiText?: string;
+  isCustomEmoji?: boolean;
+}
+
+interface ChatMessage {
+  id: string;
+  author: string;
+  authorAvatar?: string;
+  badges?: Record<string, string>;
+  parts: MessagePart[];
+  timestamp: Date;
+  authorChannelId?: string;
+  superchat?: {
+    amount: string;
+    color: string;
+    sticker?: {
+      url: string;
+      alt: string;
+    };
+  };
+}
+
+// Turns a username into a stable color so each author always looks the same
+function getColorFromName(name: string): string {
+  let hash = 0;
+  for (let i = 0; i < name.length; i++) {
+    hash = ((hash << 5) - hash) + name.charCodeAt(i);
+    hash = hash & hash;
+  }
+  const hue = Math.abs(hash) % 360;
+  return `hsl(${hue}, 70%, 55%)`;
+}
+
+export default function YouTubeChat({ videoId, accessToken, session, onEmotesDiscovered, onMessages, fontSize = 14 }: YouTubeChatProps) {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const messagesContainerRef = useRef<HTMLDivElement>(null);
+  const [messages, setMessages] = useState<ChatMessage[]>([]);
+  const [isConnected, setIsConnected] = useState(false);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const pollingIntervalRef = useRef<ReturnType<typeof setInterval> | null>(null);
+  const lastMessageCountRef = useRef(0);
+  // Remembers how many emotes we've already reported so we don't spam the parent
+  const lastEmoteCountRef = useRef(0);
+
+  // Keep messages fresh by polling our backend every couple of seconds
+  useEffect(() => {
+    if (!videoId) return;
+
+    let isMounted = true;
+
+    const fetchChatMessages = async () => {
+      try {
+        setError(null);
+
+        const res = await fetch(`/api/youtube-stream-chat?videoId=${encodeURIComponent(videoId)}`);
+
+        if (!res.ok) {
+          const errorData = await res.json().catch(() => ({}));
+          console.error('Chat API error:', errorData);
+          throw new Error(errorData.error || `HTTP ${res.status}`);
+        }
+
+        const data = await res.json();
+
+        if (!isMounted) return;
+
+        if (data.success && data.messages) {
+          const fetchedMessages = (data.messages as any[]).map((msg: any) => ({
+            id: msg.id,
+            author: msg.author,
+            authorAvatar: msg.authorAvatar,
+            badges: msg.badges,
+            parts: (msg.parts || []) as MessagePart[],
+            timestamp: new Date(msg.timestamp),
+            authorChannelId: msg.authorChannelId,
+            superchat: msg.superchat,
+          }));
+
+          // Deduplicate just in case the API sends anything twice
+          const uniqueMessagesMap = new Map();
+          fetchedMessages.forEach(m => uniqueMessagesMap.set(m.id, m));
+          const newMessages = Array.from(uniqueMessagesMap.values());
+
+          // Let the parent know about any newly spotted emotes (for autocomplete)
+          const currentEmoteCount = Array.isArray(data.emotes) ? data.emotes.length : 0;
+          if (onEmotesDiscovered && currentEmoteCount !== lastEmoteCountRef.current) {
+            lastEmoteCountRef.current = currentEmoteCount;
+            onEmotesDiscovered(
+              (data.emotes as any[]).map((e) => ({
+                name: e.name,
+                url: e.url,
+                isCustom: !!e.isCustomEmoji,
+              }))
+            );
+          }
+
+          // Compare the last message ID (not just count) to catch the edge case where
+          // one message rolls off while another comes in, keeping the count identical.
+          const lastNewId = newMessages.length > 0 ? newMessages[newMessages.length - 1].id : null;
+          const lastCurrentId = messages.length > 0 ? messages[messages.length - 1].id : null;
+
+          if (newMessages.length !== messages.length || lastNewId !== lastCurrentId) {
+            setMessages(newMessages);
+            lastMessageCountRef.current = newMessages.length;
+
+            // Set as connected once we get the first successful response
+            if (!isConnected) {
+              setIsConnected(true);
+              setIsLoading(false);
+            }
+          } else if (!isConnected) {
+            // Even an empty response counts as a successful connection
+            setIsConnected(true);
+            setIsLoading(false);
+          }
+        }
+      } catch (err) {
+        if (isMounted) {
+          console.error('Error fetching YouTube chat:', err);
+          setError(err instanceof Error ? err.message : 'Failed to fetch messages');
+          setIsLoading(false);
+        }
+      }
+    };
+
+    // Kick off the first fetch right away, then repeat every 2 s
+    fetchChatMessages();
+    pollingIntervalRef.current = setInterval(fetchChatMessages, 2000);
+
+    return () => {
+      isMounted = false;
+      if (pollingIntervalRef.current) {
+        clearInterval(pollingIntervalRef.current);
+      }
+    };
+  }, [videoId, isConnected]);
+
+  // Keep the view pinned to the newest message
+  useEffect(() => {
+    if (messagesContainerRef.current) {
+      messagesContainerRef.current.scrollTop = messagesContainerRef.current.scrollHeight;
+    }
+  }, [messages]);
+
+  // Pass the current message list up so the parent can use it in unified chat
+  useEffect(() => {
+    if (onMessages) {
+      onMessages(messages);
+    }
+  }, [messages, onMessages]);
+
+  if (isLoading) {
+    return (
+      <div className="yt-chat-status">
+        <AiOutlineLoading3Quarters className="animate-spin" /> Connecting to YouTube chat...
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="yt-chat-status yt-chat-error">
+        <div>⚠️ {error}</div>
+        <div className="yt-chat-error-sub">You can still send messages below</div>
+      </div>
+    );
+  }
+
+  return (
+    <div ref={containerRef} className="yt-chat-outer">
+      <div
+        ref={messagesContainerRef}
+        className="yt-chat-container"
+        style={{ '--chat-font-size': `${fontSize}px` } as React.CSSProperties}
+      >
+        {!isConnected && (
+          <div className="yt-chat-placeholder">
+            Connecting to YouTube chat...
+          </div>
+        )}
+        {isConnected && messages.length === 0 && (
+          <div className="yt-chat-placeholder">
+            Waiting for messages...
+          </div>
+        )}
+        {messages.map((msg) => {
+          if (msg.superchat) {
+            return (
+              <div key={msg.id} className="yt-superchat" style={{ backgroundColor: msg.superchat.color }}>
+                <div className="yt-superchat-header">
+                  {msg.authorAvatar && (
+                    <img src={msg.authorAvatar} alt={msg.author} className="avatar" />
+                  )}
+                  <div className="yt-superchat-info">
+                    <div className="yt-superchat-author">{msg.author}</div>
+                    <div className="yt-superchat-amount">{msg.superchat.amount}</div>
+                  </div>
+                </div>
+                {(msg.parts.length > 0 || msg.superchat.sticker) && (
+                  <div className="yt-superchat-body">
+                    {msg.parts.map((part, i) =>
+                      part.type === 'emoji' ? (
+                        <img
+                          key={i}
+                          src={part.url}
+                          alt={part.alt || part.emojiText || '🙂'}
+                          title={part.emojiText || part.alt}
+                          className={`yt-emoji ${part.isCustomEmoji ? 'custom' : 'standard'}`}
+                        />
+                      ) : (
+                        <React.Fragment key={i}>{part.text}</React.Fragment>
+                      )
+                    )}
+                    {msg.superchat.sticker && (
+                      <img
+                        src={msg.superchat.sticker.url}
+                        alt={msg.superchat.sticker.alt}
+                        className="yt-superchat-sticker"
+                      />
+                    )}
+                  </div>
+                )}
+              </div>
+            );
+          }
+
+          return (
+            <div key={msg.id} className="message">
+              <div className="message-single-line">
+                <span className="timestamp">
+                  {msg.timestamp.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })}
+                </span>
+                {msg.authorAvatar && (
+                  <img src={msg.authorAvatar} alt={msg.author} className="avatar" />
+                )}
+                {msg.badges && Object.keys(msg.badges).length > 0 && (
+                  <div className="yt-message-badges">
+                    {Object.entries(msg.badges).map(([name, url]) => (
+                      <img
+                        key={name}
+                        src={url}
+                        alt={name}
+                        className="badge yt-badge"
+                        title={name}
+                      />
+                    ))}
+                  </div>
+                )}
+                <span className="author" style={{ color: getColorFromName(msg.author) }}>
+                  {msg.author}
+                </span>
+                <span className="message-separator">:</span>
+                <span className="message-text">
+                  {msg.parts.map((part, i) =>
+                    part.type === 'emoji' ? (
+                      <img
+                        key={i}
+                        src={part.url}
+                        alt={part.alt || part.emojiText || '🙂'}
+                        title={part.emojiText || part.alt}
+                        className={`yt-emoji ${part.isCustomEmoji ? 'custom' : 'standard'}`}
+                      />
+                    ) : (
+                      <React.Fragment key={i}>{part.text}</React.Fragment>
+                    )
+                  )}
+                </span>
+              </div>
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

src/components/YouTubeLinker.tsx

@@ -0,0 +1,202 @@
+import React, { useState, useEffect } from 'react';
+import { FaPlus, FaTrash, FaYoutube } from 'react-icons/fa';
+import {
+  getYoutubeLinks,
+  addYoutubeLink,
+  removeYoutubeLink,
+} from '../lib/youtubeLinks';
+import type { YouTubeLink } from '../lib/youtubeLinks';
+import type { TwitchChannel } from '../components/AppContainer';
+import '../styles/YouTubeLinker.css';
+
+interface YouTubeLinkerProps {
+  availableChannels: TwitchChannel[];
+  onClose: () => void;
+  onLinksChanged?: () => void;
+}
+
+export default function YouTubeLinker({ availableChannels, onClose, onLinksChanged }: YouTubeLinkerProps) {
+  const [youtubeLinks, setYoutubeLinks] = useState<YouTubeLink[]>(getYoutubeLinks());
+  const [selectedChannelId, setSelectedChannelId] = useState<string>('');
+  const [searchQuery, setSearchQuery] = useState<string>('');
+  const [youtubeUrl, setYoutubeUrl] = useState<string>('');
+  const [error, setError] = useState<string>('');
+
+  const handleAddLink = () => {
+    if (!selectedChannelId || !youtubeUrl.trim()) return;
+
+    // Validate URL format
+    const trimmed = youtubeUrl.trim();
+    if (!trimmed.startsWith('https://www.youtube.com/') && !trimmed.startsWith('https://youtube.com/') && !trimmed.startsWith('http://www.youtube.com/') && !trimmed.startsWith('http://youtube.com/')) {
+      setError('Please enter a valid YouTube channel URL (e.g. https://www.youtube.com/@channelname)');
+      return;
+    }
+
+    const channel = availableChannels.find((c) => c.id === selectedChannelId);
+    if (channel) {
+      addYoutubeLink({
+        twitchChannelId: channel.id,
+        twitchDisplayName: channel.displayName,
+        youtubeUrl: trimmed,
+      });
+      setYoutubeLinks(getYoutubeLinks());
+      setSelectedChannelId('');
+      setSearchQuery('');
+      setYoutubeUrl('');
+      setError('');
+      onLinksChanged?.();
+    }
+  };
+
+  const handleRemoveLink = (twitchChannelId: string) => {
+    removeYoutubeLink(twitchChannelId);
+    setYoutubeLinks(getYoutubeLinks());
+    onLinksChanged?.();
+  };
+
+  const isAlreadyLinked = (channelId: string) =>
+    youtubeLinks.some((l) => l.twitchChannelId === channelId);
+
+  const unlinkedChannels = availableChannels.filter(
+    (c) => !isAlreadyLinked(c.id)
+  );
+
+  const filteredChannels = searchQuery.trim() === ''
+    ? unlinkedChannels
+    : unlinkedChannels.filter((c) =>
+      c.displayName.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      c.name.toLowerCase().includes(searchQuery.toLowerCase())
+    );
+
+  return (
+    <div className="ytlinker-overlay" onClick={onClose}>
+      <div className="ytlinker-manager" onClick={(e) => e.stopPropagation()}>
+        <h2>
+          <FaYoutube style={{ color: '#FF0000', marginRight: '8px', verticalAlign: 'middle' }} />
+          Link YouTube Channels
+        </h2>
+        <p className="ytlinker-subtitle">Link a YouTube channel to a followed streamer to see their YouTube live chat</p>
+
+        <div className="ytlinker-add-section">
+          <div className="ytlinker-inputs">
+            <div className="ytlinker-channel-select">
+              <label className="ytlinker-label">Twitch Channel</label>
+              <input
+                type="text"
+                placeholder="Search followed channels..."
+                value={searchQuery}
+                onChange={(e) => {
+                  setSearchQuery(e.target.value);
+                  setSelectedChannelId('');
+                }}
+                className="ytlinker-search"
+              />
+              <div className="ytlinker-dropdown">
+                {filteredChannels.length === 0 ? (
+                  <div className="ytlinker-no-channels">
+                    {searchQuery ? 'No channels match your search' : 'All followed channels already have a YouTube link'}
+                  </div>
+                ) : (
+                  filteredChannels.map((channel) => (
+                    <button
+                      key={channel.id}
+                      className="ytlinker-channel-item"
+                      onClick={() => {
+                        setSelectedChannelId(channel.id);
+                        setSearchQuery(channel.displayName);
+                      }}
+                    >
+                      {channel.profileImageUrl && (
+                        <img src={channel.profileImageUrl} alt="" className="item-avatar" />
+                      )}
+                      <div className="ytlinker-channel-info">
+                        <div className="ytlinker-channel-display-name">{channel.displayName}</div>
+                        <div className="ytlinker-channel-username">@{channel.name}</div>
+                      </div>
+                    </button>
+                  ))
+                )}
+              </div>
+              {selectedChannelId && (
+                <div className="ytlinker-selected-display">
+                  ✓ {unlinkedChannels.find((c) => c.id === selectedChannelId)?.displayName || searchQuery}
+                </div>
+              )}
+            </div>
+
+            <div className="ytlinker-url-input">
+              <label className="ytlinker-label">YouTube Channel URL</label>
+              <input
+                type="text"
+                placeholder="https://www.youtube.com/@channelname"
+                value={youtubeUrl}
+                onChange={(e) => {
+                  setYoutubeUrl(e.target.value);
+                  setError('');
+                }}
+                className="ytlinker-search"
+              />
+            </div>
+          </div>
+
+          {error && <div className="ytlinker-error">{error}</div>}
+
+          <button
+            className="ytlinker-add-button"
+            onClick={handleAddLink}
+            disabled={!selectedChannelId || !youtubeUrl.trim()}
+          >
+            <FaPlus /> Link
+          </button>
+        </div>
+
+        <div className="ytlinker-items">
+          {youtubeLinks.length === 0 ? (
+            <p className="ytlinker-empty">No YouTube channels linked yet</p>
+          ) : (
+            youtubeLinks.map((link) => {
+              const channel = availableChannels.find((c) => c.id === link.twitchChannelId);
+              return (
+                <div key={link.twitchChannelId} className="ytlinker-item">
+                  <div className="ytlinker-item-info">
+                    {channel?.profileImageUrl && (
+                      <img src={channel.profileImageUrl} alt="" className="item-avatar" />
+                    )}
+                    <div className="ytlinker-item-details">
+                      <div className="ytlinker-item-name">{link.twitchDisplayName}</div>
+                      <a
+                        href={link.youtubeUrl}
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        className="ytlinker-item-url"
+                      >
+                        {link.youtubeUrl}
+                      </a>
+                    </div>
+                  </div>
+                  <button
+                    className="ytlinker-remove-button"
+                    onClick={() => handleRemoveLink(link.twitchChannelId)}
+                    title="Remove YouTube link"
+                  >
+                    <FaTrash />
+                  </button>
+                </div>
+              );
+            })
+          )}
+        </div>
+
+        <div className="ytlinker-footer">
+          <p className="ytlinker-info-text">
+            <FaYoutube style={{ marginRight: '6px', color: '#FF0000' }} />
+            When viewing a linked channel, YouTube live chat will appear above the Twitch chat
+          </p>
+          <button className="ytlinker-close-button" onClick={onClose}>
+            Close
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

src/env.d.ts

@@ -0,0 +1 @@
+/// <reference path="../.astro/types.d.ts" />

src/hooks/useStreamMonitor.ts

@@ -0,0 +1,90 @@
+import { useState, useEffect, useCallback } from 'react';
+import {
+  checkLiveStreamers,
+  getWatchedStreamers,
+  markStreamerNotified,
+  markStreamerOffline,
+  getNotifiedStreamers,
+} from '../lib/streamMonitor';
+import type { LiveStreamer } from '../lib/streamMonitor';
+import type { PlatformSession } from '../lib/types';
+
+interface UseStreamMonitorOptions {
+  session: PlatformSession | undefined;
+  clientId: string;
+  enabled?: boolean;
+  checkInterval?: number; // in milliseconds, default 60000 (1 minute)
+}
+
+export function useStreamMonitor({
+  session,
+  clientId,
+  enabled = true,
+  checkInterval = 60000,
+}: UseStreamMonitorOptions) {
+  const [liveStreamers, setLiveStreamers] = useState<LiveStreamer[]>([]);
+  const [newLiveStreamer, setNewLiveStreamer] = useState<LiveStreamer | null>(null);
+  const [isChecking, setIsChecking] = useState(false);
+
+  const checkStreamers = useCallback(async () => {
+    if (!session || !enabled) return;
+
+    setIsChecking(true);
+    try {
+      const watchedStreamers = getWatchedStreamers();
+      const nowLive = await checkLiveStreamers(watchedStreamers, session.accessToken, clientId);
+
+      const notifiedStreamers = getNotifiedStreamers();
+
+      // Check for newly live streamers
+      const newlyLive = nowLive.filter((streamer) => !notifiedStreamers.has(streamer.id));
+
+      if (newlyLive.length > 0) {
+        // Notify about the first newly live streamer
+        const firstNewStreamer = newlyLive[0];
+        setNewLiveStreamer(firstNewStreamer);
+        markStreamerNotified(firstNewStreamer.id);
+      }
+
+      // Check for streamers that went offline
+      for (const streamerId of notifiedStreamers) {
+        if (!nowLive.find((s) => s.id === streamerId)) {
+          markStreamerOffline(streamerId);
+        }
+      }
+
+      setLiveStreamers(nowLive);
+    } catch (error) {
+      console.error('Error monitoring streams:', error);
+    } finally {
+      setIsChecking(false);
+    }
+  }, [session, clientId, enabled]);
+
+  // Check on mount and then periodically
+  useEffect(() => {
+    if (!enabled || !session) {
+      setNewLiveStreamer(null);
+      return;
+    }
+
+    // Check immediately
+    checkStreamers();
+
+    // Set up interval
+    const interval = setInterval(checkStreamers, checkInterval);
+
+    return () => clearInterval(interval);
+  }, [checkStreamers, enabled, session, checkInterval]);
+
+  const clearNewNotification = useCallback(() => {
+    setNewLiveStreamer(null);
+  }, []);
+
+  return {
+    liveStreamers,
+    newLiveStreamer,
+    isChecking,
+    clearNewNotification,
+  };
+}

src/hooks/useTokenRefresh.ts

@@ -0,0 +1,158 @@
+import { useEffect, useRef, useCallback } from 'react';
+import type { PlatformSession } from '../lib/types';
+
+interface TokenRefreshOptions {
+  warningThreshold?: number; // ms before expiry to start refresh (default: 5 min)
+  checkInterval?: number; // ms between checks (default: 1 min)
+  maxRetries?: number; // max refresh attempts (default: 3)
+}
+
+const DEFAULT_WARNING_THRESHOLD = 5 * 60 * 1000; // 5 minutes
+const DEFAULT_CHECK_INTERVAL = 60 * 1000; // 1 minute
+const DEFAULT_MAX_RETRIES = 3;
+
+/**
+ * Custom hook for automatic Twitch token refresh with retry logic
+ * Monitors token expiration and proactively refreshes before expiry
+ */
+export const useTokenRefresh = (
+  session: PlatformSession | null,
+  onSessionUpdate: (session: PlatformSession) => void,
+  onRefreshError: (error: Error) => void,
+  options: TokenRefreshOptions = {}
+) => {
+  const {
+    warningThreshold = DEFAULT_WARNING_THRESHOLD,
+    checkInterval = DEFAULT_CHECK_INTERVAL,
+    maxRetries = DEFAULT_MAX_RETRIES,
+  } = options;
+
+  const intervalRef = useRef<NodeJS.Timeout>();
+  const retryCountRef = useRef(0);
+  const isRefreshingRef = useRef(false);
+
+  const refreshToken = useCallback(async () => {
+    // We need at least a session to refresh. The actual refresh token is read
+    // from the httpOnly cookie server-side, so session.refreshToken is optional.
+    if (!session || isRefreshingRef.current) {
+      return;
+    }
+
+    isRefreshingRef.current = true;
+
+    try {
+      const response = await fetch('/api/refresh-token', {
+        method: 'POST',
+        // Ensure httpOnly auth cookies are sent with the request so the
+        // server-side refresh endpoint can read the refresh token.
+        credentials: 'same-origin',
+        headers: { 'Content-Type': 'application/json' },
+        // Only send the platform — the server reads the refresh token
+        // from the httpOnly cookie, not from client-supplied data.
+        body: JSON.stringify({
+          platform: session.platform,
+        }),
+      });
+
+      if (!response.ok) {
+        throw new Error(`Token refresh failed: ${response.status} ${response.statusText}`);
+      }
+
+      const newTokenData = await response.json();
+
+      const now = new Date().getTime();
+      const updatedSession = {
+        ...session,
+        accessToken: newTokenData.accessToken,
+        refreshToken: newTokenData.refreshToken || session.refreshToken,
+        expiresAt: now + ((newTokenData.expiresIn || 3600) * 1000),
+      };
+
+      onSessionUpdate(updatedSession);
+      retryCountRef.current = 0; // Reset retry count on success
+
+      console.log('✓ Token refreshed successfully', {
+        expiresIn: newTokenData.expiresIn,
+        expiresAt: new Date(updatedSession.expiresAt).toISOString(),
+      });
+    } catch (error) {
+      const err = error instanceof Error ? error : new Error('Unknown error');
+      console.error('✗ Token refresh failed:', err.message);
+
+      retryCountRef.current += 1;
+
+      if (retryCountRef.current >= maxRetries) {
+        console.error(`Token refresh failed after ${maxRetries} retries. Logging out.`);
+        onRefreshError(err);
+        retryCountRef.current = 0;
+      }
+    } finally {
+      isRefreshingRef.current = false;
+    }
+  }, [session, onSessionUpdate, onRefreshError, maxRetries]);
+
+  const checkAndRefresh = useCallback(() => {
+    // Require at least an expiresAt to know we have a real session.
+    // We do NOT require session.refreshToken here because the server reads it
+    // from the httpOnly cookie — the client-side refreshToken is optional.
+    if (!session?.expiresAt) {
+      return;
+    }
+
+    const now = new Date().getTime();
+    const timeUntilExpiry = session.expiresAt - now;
+
+    // Also refresh immediately when the accessToken is absent (e.g. on page
+    // reload — we no longer persist it to localStorage so it starts undefined).
+    const tokenMissing = !session.accessToken;
+
+    if (tokenMissing || timeUntilExpiry < warningThreshold) {
+      if (tokenMissing) {
+        console.log('Access token missing (page reload), refreshing immediately...');
+      } else {
+        console.log(`Token expiring in ${Math.round(timeUntilExpiry / 1000)}s, refreshing...`);
+      }
+      refreshToken();
+    }
+  }, [session, warningThreshold, refreshToken]);
+
+  useEffect(() => {
+    // We need at least a session with expiresAt to schedule refreshes.
+    // The actual refresh token lives in the httpOnly cookie on the server.
+    if (!session?.expiresAt) {
+      // Clear interval if no session
+      if (intervalRef.current) {
+        clearInterval(intervalRef.current);
+        intervalRef.current = undefined;
+      }
+      return;
+    }
+
+    // Initial check
+    checkAndRefresh();
+
+    // Set up periodic check
+    intervalRef.current = setInterval(checkAndRefresh, checkInterval);
+
+    return () => {
+      if (intervalRef.current) {
+        clearInterval(intervalRef.current);
+      }
+    };
+  }, [session, checkInterval, checkAndRefresh]);
+
+  // Cleanup on unmount
+  useEffect(() => {
+    return () => {
+      if (intervalRef.current) {
+        clearInterval(intervalRef.current);
+      }
+    };
+  }, []);
+
+  return {
+    refreshToken,
+    isRefreshing: isRefreshingRef.current,
+    retryCount: retryCountRef.current,
+  };
+};

src/hooks/useTwitchChat.ts

@@ -0,0 +1,382 @@
+import { useState, useEffect, useCallback, useRef } from 'react';
+import { StaticAuthProvider } from '@twurple/auth';
+import { ChatClient } from '@twurple/chat';
+import { getBadge, getBadgeDetail } from '../lib/badges';
+import type { ChatMessage } from '../lib/types';
+
+// Cache for user info - limit to 500 entries for memory efficiency
+const userInfoCache = new Map<string, { displayName: string; profileImageUrl: string | null }>();
+const MAX_CACHE_SIZE = 500;
+const NOTIFICATION_AUDIO_VOLUME = 0.3;
+
+function setUserInfoCache(userId: string, info: { displayName: string; profileImageUrl: string | null }) {
+  // Limit cache size to prevent memory leaks
+  if (userInfoCache.size >= MAX_CACHE_SIZE) {
+    const firstKey = userInfoCache.keys().next().value;
+    if (firstKey !== undefined) {
+      userInfoCache.delete(firstKey);
+    }
+  }
+  userInfoCache.set(userId, info);
+}
+
+// Async function to get user info
+async function getUserInfo(userId: string, accessToken: string) {
+  if (userInfoCache.has(userId)) {
+    return userInfoCache.get(userId);
+  }
+
+  try {
+    const response = await fetch(`/api/user-info?userId=${userId}`, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    });
+    if (response.ok) {
+      const data = await response.json();
+      setUserInfoCache(userId, data);
+      return data;
+    }
+  } catch (error) {
+    console.error('Failed to fetch user info:', error);
+  }
+
+  return null;
+}
+
+export function useTwitchChat(
+  channelName: string,
+  accessToken: string,
+  username: string,
+  onMessage: (message: ChatMessage) => void,
+  enabled: boolean = true,
+  mentionSoundEnabled: boolean = true
+) {
+  const [isConnected, setIsConnected] = useState(false);
+  const [client, setClient] = useState<ChatClient | null>(null);
+
+  // Retrieve Client ID from env; it's required for twurple's AuthProvider
+  const clientId = import.meta.env.PUBLIC_TWITCH_CLIENT_ID;
+
+  useEffect(() => {
+    if (!enabled) return;
+    if (!channelName || !accessToken || !username || !clientId) {
+      if (enabled && !clientId) {
+        console.error('Twitch Client ID is missing (PUBLIC_TWITCH_CLIENT_ID env var)');
+      }
+      return;
+    }
+
+    let active = true;
+
+    // Use StaticAuthProvider for client-side chat
+    const authProvider = new StaticAuthProvider(clientId, accessToken);
+
+    // Initialize the Twurple ChatClient
+    const newClient = new ChatClient({
+      authProvider,
+      channels: [channelName],
+      // reconnect handled by default in twurple
+    });
+
+    newClient.onConnect(() => {
+      if (!active) return;
+      console.log(`Connected to ${channelName}`);
+      setIsConnected(true);
+    });
+
+    newClient.onDisconnect(() => {
+      if (!active) return;
+      console.log('Disconnected from Twitch chat');
+      setIsConnected(false);
+    });
+
+    newClient.onMessage((channel, user, message, msg) => {
+      if (!active) return;
+
+      const replyInfo = msg.parentMessageId ? {
+        id: msg.parentMessageId,
+        author: msg.parentMessageUserDisplayName || msg.parentMessageUserName || '',
+        content: msg.parentMessageText || '',
+      } : undefined;
+
+      const mentionsUser = (
+        message.toLowerCase().includes(`@${username.toLowerCase()}`) ||
+        (replyInfo?.author.toLowerCase() === username.toLowerCase())
+      );
+
+      // Map Twitch emotes - Twurple provides emote data in msg.emotes
+      const twitchEmotes: Record<string, string[]> = {};
+      msg.emoteOffsets.forEach((offsets, emoteId) => {
+        twitchEmotes[emoteId] = offsets;
+      });
+
+      const isBot = msg.userInfo.badges.has('bot');
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const cachedUserInfo = msg.userInfo.userId ? userInfoCache.get(msg.userInfo.userId) : undefined;
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: msg.isCheer ? `${message} [${msg.bits} bits]` : message,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        authorAvatar: cachedUserInfo?.profileImageUrl || undefined,
+        replyTo: replyInfo,
+        mentionsUser,
+        emotes: twitchEmotes,
+        isBot,
+        badges: badgeImages,
+        badgeDetails,
+        isCurrentUser: msg.userInfo.userName.toLowerCase() === username.toLowerCase(),
+        messageType: msg.isRedemption ? 'redemption' : (msg.isCheer ? 'cheer' : 'chat'),
+        rewardId: msg.isRedemption ? (msg.rewardId || undefined) : undefined,
+      };
+
+      if (!cachedUserInfo && msg.userInfo.userId) {
+        getUserInfo(msg.userInfo.userId, accessToken).then((userInfo) => {
+          if (userInfo?.profileImageUrl) {
+            onMessage({
+              ...chatMessage,
+              authorAvatar: userInfo.profileImageUrl,
+            });
+            return;
+          }
+          onMessage(chatMessage);
+        }).catch(() => {
+          onMessage(chatMessage);
+        });
+      } else {
+        onMessage(chatMessage);
+      }
+
+      if (mentionsUser && mentionSoundEnabled) {
+        try {
+          const audio = new Audio('data:audio/wav;base64,UklGRnoGAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQoGAACBhYqFbF1fdJivrJBhNjVgodDbq2EcBj+a2/LDciUFLIHO8tiJNwgZaLvt559NEAxQp+PwtmMcBjiR1/LMeSwFJHfH8N2QQAoUXrTp66hVFApGn+DyvmwhBTGH0fPTgjMGG2S36+OZSgwOUKXh8bllHgU2jtXywH0pBSl+zPLaizsIGGS56+idTgwNU6rm8bllHAU5kdXx');
+          audio.volume = NOTIFICATION_AUDIO_VOLUME;
+          audio.play().catch(() => { });
+        } catch (e) { }
+      }
+    });
+
+    newClient.onAction((channel, user, message, msg) => {
+      if (!active) return;
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const cachedUserInfo = msg.userInfo.userId ? userInfoCache.get(msg.userInfo.userId) : undefined;
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: message,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        authorAvatar: cachedUserInfo?.profileImageUrl || undefined,
+        mentionsUser: false,
+        emotes: {},
+        isBot: msg.userInfo.badges.has('bot'),
+        badges: badgeImages,
+        badgeDetails,
+        isCurrentUser: msg.userInfo.userName.toLowerCase() === username.toLowerCase(),
+        messageType: 'chat',
+      };
+
+      onMessage(chatMessage);
+    });
+
+    newClient.onSub((channel, user, subInfo, msg) => {
+      if (!active) return;
+      const tier = subInfo.plan === 'Prime' ? 'Prime' : subInfo.plan === '3000' ? '3' : subInfo.plan === '2000' ? '2' : '1';
+      const subMessage = `subscribed with ${subInfo.plan === 'Prime' ? 'Prime Gaming' : `a Tier ${tier} subscription`}${subInfo.message ? ` - ${subInfo.message}` : ''}`;
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: subMessage,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        mentionsUser: false,
+        emotes: {},
+        isBot: false,
+        badges: badgeImages,
+        badgeDetails,
+        messageType: 'subscription',
+      };
+
+      onMessage(chatMessage);
+    });
+
+    newClient.onResub((channel, user, subInfo, msg) => {
+      if (!active) return;
+      const monthsCount = subInfo.months;
+      const monthLabel = monthsCount === 1 ? 'month' : 'months';
+      const resubMessage = `resubscribed for ${monthsCount} ${monthLabel}${subInfo.message ? ` - ${subInfo.message}` : ''}`;
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: resubMessage,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        mentionsUser: false,
+        emotes: {},
+        isBot: false,
+        badges: badgeImages,
+        badgeDetails,
+        messageType: 'resub',
+      };
+
+      onMessage(chatMessage);
+    });
+
+    newClient.onSubGift((channel, recipient, subInfo, msg) => {
+      if (!active) return;
+      const tier = subInfo.plan === '3000' ? '3' : subInfo.plan === '2000' ? '2' : '1';
+      const giftMessage = `gifted a Tier ${tier} subscription to ${recipient}`;
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: giftMessage,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        mentionsUser: false,
+        emotes: {},
+        isBot: false,
+        badges: badgeImages,
+        badgeDetails,
+        messageType: 'subgift',
+      };
+
+      onMessage(chatMessage);
+    });
+
+    // Handle community gifted subs (mass gifts)
+    newClient.onCommunitySub((channel, user, giftInfo, msg) => {
+      if (!active) return;
+      const tier = giftInfo.plan === '3000' ? '3' : giftInfo.plan === '2000' ? '2' : '1';
+      const giftMessage = `gifted ${giftInfo.count} Tier ${tier} subscriptions to the community!`;
+
+      const badgeImages: Record<string, string> = {};
+      const badgeDetails: Record<string, { url: string; title: string }> = {};
+      msg.userInfo.badges.forEach((version, badgeName) => {
+        const detail = getBadgeDetail(badgeName, version);
+        if (detail) {
+          badgeImages[badgeName] = detail.url;
+          badgeDetails[badgeName] = { url: detail.url, title: detail.title };
+        }
+      });
+
+      const chatMessage: ChatMessage = {
+        id: msg.id,
+        platform: 'twitch',
+        author: msg.userInfo.displayName || msg.userInfo.userName || 'Anonymous',
+        content: giftMessage,
+        timestamp: msg.date,
+        userId: msg.userInfo.userId,
+        authorColor: msg.userInfo.color || '#FFFFFF',
+        mentionsUser: false,
+        emotes: {},
+        isBot: false,
+        badges: badgeImages,
+        badgeDetails,
+        messageType: 'subgift',
+      };
+
+      onMessage(chatMessage);
+    });
+
+    newClient.connect();
+
+    setClient(newClient);
+
+    return () => {
+      active = false;
+      if (newClient) {
+        newClient.quit();
+      }
+    };
+  }, [channelName, accessToken, username, onMessage, enabled, clientId]);
+
+  const sendMessage = useCallback(
+    async (message: string, replyToMessageId?: string) => {
+      if (!client || !isConnected) {
+        throw new Error('Not connected to chat');
+      }
+
+      try {
+        if (replyToMessageId) {
+          // Twurple supports replies natively
+          await client.say(channelName, message, { replyTo: replyToMessageId });
+        } else {
+          await client.say(channelName, message);
+        }
+      } catch (error) {
+        console.error('Failed to send message:', error);
+        throw error;
+      }
+    },
+    [client, isConnected, channelName]
+  );
+
+  return { isConnected, sendMessage };
+}

src/lib/badges.ts

@@ -0,0 +1,76 @@
+import { ApiClient } from '@twurple/api';
+import { StaticAuthProvider } from '@twurple/auth';
+import type { HelixChatBadgeSet, HelixChatBadgeVersion } from '@twurple/api';
+
+// Shorthand for badge data we actually care about in the UI
+export interface BadgeDetail {
+  id: string;
+  version: string;
+  url: string;
+  title: string;
+  description: string;
+}
+
+// Store the full HelixChatBadgeSet objects for better metadata
+let badgesGlobal: Map<string, HelixChatBadgeSet> = new Map();
+let badgesChannel: Map<string, HelixChatBadgeSet> = new Map();
+
+// Wipe everything if we switch accounts or reset
+export function clearBadgeCache(): void {
+  badgesGlobal.clear();
+  badgesChannel.clear();
+}
+
+// Grab badge sets from Twitch. If channelId is null, gets global ones.
+async function fetchBadges(apiClient: ApiClient, channelId?: string): Promise<Map<string, HelixChatBadgeSet>> {
+  try {
+    const badgeSets = channelId
+      ? await apiClient.chat.getChannelBadges(channelId)
+      : await apiClient.chat.getGlobalBadges();
+
+    const map = new Map<string, HelixChatBadgeSet>();
+    badgeSets.forEach(set => map.set(set.id, set));
+    return map;
+  } catch (error) {
+    console.warn(`Twitch ${channelId ? 'channel' : 'global'} badges not loaded:`, error);
+    return new Map();
+  }
+}
+
+// Pull down both global and channel-specific badges so we can show them in chat
+export async function initializeBadges(channelId: string, accessToken: string, clientId: string): Promise<void> {
+  const authProvider = new StaticAuthProvider(clientId, accessToken);
+  const apiClient = new ApiClient({ authProvider });
+
+  const [global, channel] = await Promise.all([
+    fetchBadges(apiClient),
+    fetchBadges(apiClient, channelId),
+  ]);
+
+  badgesGlobal = global;
+  badgesChannel = channel;
+}
+
+// Get the raw image URL for a specific badge/version
+export function getBadge(name: string, version: string): string | undefined {
+  const detail = getBadgeDetail(name, version);
+  return detail?.url;
+}
+
+// Find the full badge info, checking the channel first (custom badges) then global ones
+export function getBadgeDetail(name: string, version: string): BadgeDetail | undefined {
+  // Look in channel badges first, then global
+  const set = badgesChannel.get(name) || badgesGlobal.get(name);
+  if (!set) return undefined;
+
+  const v = set.getVersion(version);
+  if (!v) return undefined;
+
+  return {
+    id: name,
+    version: version,
+    url: v.getImageUrl(2) || v.getImageUrl(1), // Default to 2x for better appearance
+    title: v.title,
+    description: v.description
+  };
+}

src/lib/emotes.ts

@@ -0,0 +1,777 @@
+// Emote sources: 7TV, BTTV, FFZ
+import DOMPurify, { type Config as DOMPurifyConfig } from "dompurify";
+
+/**
+ * DOMPurify configuration — only the elements and attributes our emote
+ * renderer ever emits are permitted. Everything else is stripped.
+ */
+const DOMPURIFY_CONFIG: DOMPurifyConfig = {
+  ALLOWED_TAGS: ["img", "a", "strong", "span"],
+  ALLOWED_ATTR: [
+    // <img>
+    "src", "alt", "title", "class", "style", "loading",
+    "data-emote-name", "data-tooltip-url",
+    // <a>
+    "href", "target", "rel",
+  ],
+  ALLOW_DATA_ATTR: false,
+  FORCE_BODY: false,
+};
+
+const EMOTE_SIZE = "2";
+const CACHE_DURATION_DAYS = 7;
+const MS_PER_DAY = 1000 * 60 * 60 * 24;
+const CACHE_DURATION = CACHE_DURATION_DAYS * MS_PER_DAY;
+const EMOTE_BATCH_SIZE = 100;
+const MAX_REPLACEMENTS = 1000;
+
+interface EmoteMap {
+  [key: string]: string;
+}
+
+interface EmoteCache {
+  emotes: EmoteMap;
+  timestamp: number;
+}
+
+let emotes7tv: EmoteMap = {};
+let emotesBttv: EmoteMap = {};
+let emotesFfz: EmoteMap = {};
+let emotesTwitch: EmoteMap = {};
+
+/**
+ * Get cached emotes if valid
+ */
+function getCachedEmotes(cacheKey: string): EmoteMap | null {
+  try {
+    const cached = localStorage.getItem(cacheKey);
+    if (!cached) return null;
+
+    const cacheData: EmoteCache = JSON.parse(cached);
+    const isExpired = Date.now() - cacheData.timestamp > CACHE_DURATION;
+
+    if (isExpired) {
+      localStorage.removeItem(cacheKey);
+      return null;
+    }
+
+    return cacheData.emotes;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Save emotes to cache
+ */
+function setCachedEmotes(cacheKey: string, emotes: EmoteMap): void {
+  try {
+    const cacheData: EmoteCache = {
+      emotes,
+      timestamp: Date.now(),
+    };
+    localStorage.setItem(cacheKey, JSON.stringify(cacheData));
+  } catch (error) {
+    console.warn("Failed to cache emotes:", error);
+  }
+}
+
+/**
+ * Clear all emote caches
+ */
+export function clearEmoteCache(): void {
+  const cacheKeys = ["emotes_twitch_global"];
+
+  for (let i = 0; i < localStorage.length; i++) {
+    const key = localStorage.key(i);
+    if (key && key.startsWith("emotes_")) {
+      localStorage.removeItem(key);
+    }
+  }
+
+  emotes7tv = {};
+  emotesBttv = {};
+  emotesFfz = {};
+  emotesTwitch = {};
+}
+
+/**
+ * Fetch 7TV global emotes
+ */
+async function fetch7TVGlobalEmotes(): Promise<EmoteMap> {
+  const cacheKey = "emotes_7tv_global";
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) {
+    console.log('Using cached 7TV global emotes, count:', Object.keys(cached).length);
+    return cached;
+  }
+
+  try {
+    console.log('Fetching 7TV global emotes from 7tv.io');
+    const response = await fetch("https://7tv.io/v3/emote-sets/global");
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.emotes) {
+      data.emotes.forEach((emote: any) => {
+        emotes[emote.name] =
+          `https://cdn.7tv.app/emote/${emote.id}/${EMOTE_SIZE}x.webp`;
+      });
+    }
+    setCachedEmotes(cacheKey, emotes);
+    console.log('Fetched 7TV global emotes, count:', Object.keys(emotes).length);
+    return emotes;
+  } catch (error) {
+    console.warn("7TV global emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch 7TV emotes for a given channel
+ */
+async function fetch7TVEmotes(channelId: string): Promise<EmoteMap> {
+  const cacheKey = `emotes_7tv_${channelId}`;
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    const response = await fetch(`https://7tv.io/v3/users/twitch/${channelId}`);
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.emote_set?.emotes) {
+      data.emote_set.emotes.forEach((emote: any) => {
+        emotes[emote.name] =
+          `https://cdn.7tv.app/emote/${emote.id}/${EMOTE_SIZE}x.webp`;
+      });
+    }
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("7TV emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch BTTV global emotes
+ */
+async function fetchBTTVGlobalEmotes(): Promise<EmoteMap> {
+  const cacheKey = "emotes_bttv_global";
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    const response = await fetch(
+      "https://api.betterttv.net/3/cached/emotes/global",
+    );
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    data.forEach((emote: any) => {
+      emotes[emote.code] =
+        `https://cdn.betterttv.net/emote/${emote.id}/${EMOTE_SIZE}x.webp`;
+    });
+
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("BTTV global emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch BTTV emotes for a given channel
+ */
+async function fetchBTTVEmotes(channelId: string): Promise<EmoteMap> {
+  const cacheKey = `emotes_bttv_${channelId}`;
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    const response = await fetch(
+      `https://api.betterttv.net/3/cached/users/twitch/${channelId}`,
+    );
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.channelEmotes) {
+      data.channelEmotes.forEach((emote: any) => {
+        emotes[emote.code] =
+          `https://cdn.betterttv.net/emote/${emote.id}/${EMOTE_SIZE}x.webp`;
+      });
+    }
+
+    if (data.sharedEmotes) {
+      data.sharedEmotes.forEach((emote: any) => {
+        emotes[emote.code] =
+          `https://cdn.betterttv.net/emote/${emote.id}/${EMOTE_SIZE}x.webp`;
+      });
+    }
+
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("BTTV emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch FFZ global emotes
+ */
+async function fetchFFZGlobalEmotes(): Promise<EmoteMap> {
+  const cacheKey = "emotes_ffz_global";
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    const response = await fetch("https://api.frankerfacez.com/v1/set/global");
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.sets) {
+      Object.values(data.sets).forEach((set: any) => {
+        if (set.emoticons) {
+          set.emoticons.forEach((emote: any) => {
+            emotes[emote.name] =
+              `https://cdn.frankerfacez.com/emote/${emote.id}/${EMOTE_SIZE}`;
+          });
+        }
+      });
+    }
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("FFZ global emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch FFZ emotes for a given channel
+ */
+async function fetchFFZEmotes(channelName: string): Promise<EmoteMap> {
+  const cacheKey = `emotes_ffz_${channelName}`;
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    const response = await fetch(
+      `https://api.frankerfacez.com/v1/room/${channelName}`,
+    );
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.sets) {
+      const setId = data.room.set;
+      if (data.sets[setId]) {
+        data.sets[setId].emoticons.forEach((emote: any) => {
+          emotes[emote.name] =
+            `https://cdn.frankerfacez.com/emote/${emote.id}/${EMOTE_SIZE}`;
+        });
+      }
+    }
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("FFZ emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch Twitch global emotes
+ */
+async function fetchTwitchGlobalEmotes(): Promise<EmoteMap> {
+  const cacheKey = "emotes_twitch_global";
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    // Route through server-side proxy — token comes from httpOnly cookie, not localStorage.
+    const response = await fetch("/api/twitch-proxy?path=/helix/chat/emotes/global");
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.data) {
+      data.data.forEach((emote: any) => {
+        const url = emote.images.url_1x.replace("/1.0", "/2.0");
+        emotes[emote.name] = url;
+      });
+    }
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("Twitch global emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch Twitch channel emotes
+ */
+async function fetchTwitchChannelEmotes(channelId: string): Promise<EmoteMap> {
+  const cacheKey = `emotes_twitch_channel_${channelId}`;
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) return cached;
+
+  try {
+    // Route through server-side proxy — token comes from httpOnly cookie, not localStorage.
+    const response = await fetch(
+      `/api/twitch-proxy?path=/helix/chat/emotes&broadcaster_id=${encodeURIComponent(channelId)}`,
+    );
+    const data = await response.json();
+
+    const emotes: EmoteMap = {};
+    if (data.data) {
+      data.data.forEach((emote: any) => {
+        const url = emote.images.url_1x.replace("/1.0", "/2.0");
+        emotes[emote.name] = url;
+      });
+    }
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.warn("Twitch channel emotes not loaded", error);
+    return {};
+  }
+}
+
+/**
+ * Fetch user's available emote sets (includes subscriptions)
+ */
+async function fetchUserEmoteSets(userId: string): Promise<EmoteMap> {
+  const cacheKey = `emotes_twitch_user_${userId}`;
+  const cached = getCachedEmotes(cacheKey);
+  if (cached) {
+    return cached;
+  }
+
+  try {
+    const emotes: EmoteMap = {};
+    let cursor: string | null = null;
+    let pageCount = 0;
+
+    // Fetch all pages
+    do {
+      // Route through server-side proxy — token comes from httpOnly cookie, not localStorage.
+      const proxyPath = cursor
+        ? `/api/twitch-proxy?path=/helix/chat/emotes/user&user_id=${encodeURIComponent(userId)}&after=${encodeURIComponent(cursor)}`
+        : `/api/twitch-proxy?path=/helix/chat/emotes/user&user_id=${encodeURIComponent(userId)}`;
+
+      const apiResponse: Response = await fetch(proxyPath);
+
+      if (!apiResponse.ok) {
+        const errorText = await apiResponse.text();
+        console.error(
+          "Failed to fetch user emotes:",
+          apiResponse.status,
+          apiResponse.statusText,
+          errorText,
+        );
+        break;
+      }
+
+      const pageData: any = await apiResponse.json();
+      pageCount++;
+
+      if (pageData.data) {
+        pageData.data.forEach((emote: any) => {
+          const emoteId = emote.id;
+          // Prefer animated if available, otherwise static
+          const format = emote.format?.includes("animated")
+            ? "animated"
+            : "static";
+          const url = `https://static-cdn.jtvnw.net/emoticons/v2/${emoteId}/${format}/dark/2.0`;
+          emotes[emote.name] = url;
+        });
+      }
+
+      // Get next cursor for pagination
+      cursor = pageData.pagination?.cursor || null;
+    } while (cursor);
+
+    setCachedEmotes(cacheKey, emotes);
+    return emotes;
+  } catch (error) {
+    console.error("Failed to fetch user emote sets:", error);
+    return {};
+  }
+}
+
+/**
+ * Initialize emotes for a given channel
+ */
+export async function initializeEmotes(
+  channelId: string,
+  channelName: string,
+  userId?: string,
+): Promise<void> {
+  const promises = [
+    fetch7TVGlobalEmotes(),
+    fetch7TVEmotes(channelId),
+    fetchBTTVGlobalEmotes(),
+    fetchBTTVEmotes(channelId),
+    fetchFFZGlobalEmotes(),
+    fetchFFZEmotes(channelName),
+    fetchTwitchGlobalEmotes(),
+    fetchTwitchChannelEmotes(channelId),
+  ];
+
+  if (userId) {
+    promises.push(fetchUserEmoteSets(userId));
+  }
+
+  const results = await Promise.all(promises);
+
+  emotes7tv = {
+    ...results[0],
+    ...results[1],
+  };
+
+  emotesBttv = {
+    ...results[2],
+    ...results[3],
+  };
+
+  emotesFfz = {
+    ...results[4],
+    ...results[5],
+  };
+
+  const globalEmotes = results[6];
+  const channelEmotes = results[7];
+  const userEmotes = userId ? results[8] : {};
+
+  emotesTwitch = {
+    ...globalEmotes,
+    ...channelEmotes,
+    ...userEmotes,
+  };
+
+  // User emotes have been merged into emotesTwitch map
+  if (userId && Object.keys(userEmotes).length > 0) {
+    // Emotes successfully loaded and merged
+  }
+
+  // Dispatch a custom event to notify listeners that emotes have been reloaded
+  if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function') {
+    window.dispatchEvent(new Event('emotes-reloaded'));
+  }
+}
+
+/**
+ * Create an optimized emote image HTML tag
+ */
+function replaceSize(url: string): string {
+  const parts = url.split("/");
+  // Replace the first number in the last part with '4'
+  // This works for: 1x.webp -> 4x.webp, 1.0 -> 4.0, 2 -> 4, etc.
+
+  if (url.includes('betterttv')) {
+    parts[parts.length - 1] = parts[parts.length - 1].replace(/\d+/, "3");
+  } else {
+    parts[parts.length - 1] = parts[parts.length - 1].replace(/\d+/, "4");
+  }
+  return parts.join("/");
+}
+function createEmoteImg(emoteUrl: string, emoteName: string): string {
+  // Convert any quality URL to 4x quality for tooltip (highest resolution)
+  let highQualityUrl = emoteUrl;
+  const splitedUrlSize = emoteUrl.split("/").pop();
+  if (
+    splitedUrlSize &&
+    (splitedUrlSize.includes("2") || splitedUrlSize.includes("1"))
+  ) {
+    highQualityUrl = replaceSize(emoteUrl);
+  }
+  return `<img src="${emoteUrl}" alt="${escapeHtml(emoteName)}" title="${escapeHtml(emoteName)}" data-tooltip-url="${highQualityUrl}" data-emote-name="${escapeHtml(emoteName)}" class="chat-emote" style="height: 2em; vertical-align: middle; margin: 0 2px; cursor: pointer;" loading="lazy" />`;
+}
+
+/**
+ * Parse message text and replace emote codes with HTML image tags
+ * @param text - The message text
+ * @param twitchEmotes - Twitch emote data from message tags (emoteId -> positions array)
+ */
+export function parseMessageWithEmotes(
+  text: string,
+  twitchEmotes?: Record<string, string[]>,
+): string {
+  let raw: string;
+
+  if (twitchEmotes && Object.keys(twitchEmotes).length > 0) {
+    const replacements: Array<{ start: number; end: number; html: string }> =
+      [];
+
+    Object.entries(twitchEmotes).forEach(([emoteId, positions]) => {
+      positions.forEach((pos) => {
+        const [start, end] = pos.split("-").map(Number);
+        const emoteName = text.substring(start, end + 1);
+        const emoteUrl = `https://static-cdn.jtvnw.net/emoticons/v2/${emoteId}/default/dark/2.0`;
+        replacements.push({
+          start,
+          end: end + 1,
+          html: createEmoteImg(emoteUrl, emoteName),
+        });
+      });
+    });
+
+    replacements.sort((a, b) => b.start - a.start);
+
+    let result = text;
+    replacements.forEach(({ start, end, html }) => {
+      result = result.substring(0, start) + html + result.substring(end);
+    });
+
+    raw = parseThirdPartyEmotes(result);
+  } else {
+    raw = parseThirdPartyEmotes(text);
+  }
+
+  // Final sanitization pass — strip anything outside the known-safe allowlist.
+  // This is the last line of defence against XSS from malformed emote names,
+  // crafted CDN responses, or future changes to the HTML-building helpers.
+  return DOMPurify.sanitize(raw, DOMPURIFY_CONFIG) as unknown as string;
+}
+
+/**
+ * Parse third-party emotes and @mentions in text
+ */
+function escapeHtml(text: string): string {
+  return text
+    .replace(/&/g, "&amp;")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#039;");
+}
+
+/**
+ * Check if a word is a URL and convert to clickable link
+ */
+function linkifyUrl(word: string): string {
+  // Only match http(s) or www-prefixed URLs
+  const urlPattern = /^(https?:\/\/|www\.)[^\s]+$/i;
+
+  if (urlPattern.test(word)) {
+    let url = word;
+    if (word.toLowerCase().startsWith("www.")) {
+      url = "https://" + word;
+    }
+
+    // Explicitly block dangerous schemes even if the regex above is ever relaxed.
+    // URL objects normalise the protocol to lowercase, making detection reliable.
+    try {
+      const parsed = new URL(url);
+      const scheme = parsed.protocol; // e.g. "javascript:", "data:", "https:"
+      if (scheme !== "https:" && scheme !== "http:") {
+        return escapeHtml(word); // render as plain text
+      }
+    } catch {
+      return escapeHtml(word); // invalid URL — render as plain text
+    }
+
+    return `<a href="${escapeHtml(url)}" target="_blank" rel="noopener noreferrer" style="color: #6366f1; text-decoration: underline; cursor: pointer;">${escapeHtml(word)}</a>`;
+  }
+
+  return "";
+}
+
+/**
+ * Parse third-party emotes and @mentions in text
+ */
+function parseThirdPartyEmotes(text: string): string {
+  // Split by HTML tags to avoid breaking emote img tags
+  // We use a capture group so the delimiter (img tag) is included in the result array
+  const parts = text.split(/(<img[^>]*>)/);
+
+  const parsedParts = parts.map((part) => {
+    // Skip if it's already an HTML tag (our emote)
+    if (part.startsWith("<img")) {
+      return part;
+    }
+
+    // Split into words and parse
+    // Note: This approach loses exact whitespace formatting (collapses multiple spaces)
+    // A more robust approach would be to find matches and replace them, escaping the rest.
+    // For now, we'll stick to splitting by space but ensure we escape non-matches.
+    const words = part.split(" ");
+    const parsedWords = words.map((word) => {
+      // Check for URLs first
+      const linkified = linkifyUrl(word);
+      if (linkified) {
+        return linkified;
+      }
+
+      // Check for @mention
+      if (word.startsWith("@")) {
+        return `<strong>${escapeHtml(word)}</strong>`;
+      }
+
+      // Check Twitch native emotes (from cache map, manually typed)
+      if (emotesTwitch[word]) {
+        return createEmoteImg(emotesTwitch[word], word);
+      }
+
+      // Check 7TV
+      if (emotes7tv[word]) {
+        return createEmoteImg(emotes7tv[word], word);
+      }
+
+      // Check BTTV
+      if (emotesBttv[word]) {
+        return createEmoteImg(emotesBttv[word], word);
+      }
+
+      // Check FFZ
+      if (emotesFfz[word]) {
+        return createEmoteImg(emotesFfz[word], word);
+      }
+
+      // Return escaped word
+      return escapeHtml(word);
+    });
+
+    return parsedWords.join(" ");
+  });
+
+  return parsedParts.join("");
+}
+
+/**
+ * Search for emotes matching a query
+ */
+export function searchEmotes(
+  query: string,
+  limit: number = 10,
+): Array<{ name: string; url: string; source: string }> {
+  if (!query) return [];
+
+  const results: Array<{ name: string; url: string; source: string }> = [];
+  const lowerQuery = query.toLowerCase();
+
+  // Debug: Show first 5 Twitch emote names
+
+  // Search Twitch emotes (includes global, channel, and user's subscriptions)
+  Object.entries(emotesTwitch).forEach(([name, url]) => {
+    if (name.toLowerCase().includes(lowerQuery) && !isEmoteDisabled(name)) {
+      results.push({ name, url, source: "Twitch" });
+    }
+  });
+
+  // Search 7TV emotes
+  Object.entries(emotes7tv).forEach(([name, url]) => {
+    if (name.toLowerCase().includes(lowerQuery) && !isEmoteDisabled(name)) {
+      results.push({ name, url, source: "7TV" });
+    }
+  });
+
+  // Search BTTV emotes
+  Object.entries(emotesBttv).forEach(([name, url]) => {
+    if (name.toLowerCase().includes(lowerQuery) && !isEmoteDisabled(name)) {
+      results.push({ name, url, source: "BTTV" });
+    }
+  });
+
+  // Search FFZ emotes
+  Object.entries(emotesFfz).forEach(([name, url]) => {
+    if (name.toLowerCase().includes(lowerQuery) && !isEmoteDisabled(name)) {
+      results.push({ name, url, source: "FFZ" });
+    }
+  });
+
+  // Sort by relevance (exact match first, then starts with, then contains)
+  results.sort((a, b) => {
+    const aLower = a.name.toLowerCase();
+    const bLower = b.name.toLowerCase();
+
+    if (aLower === lowerQuery) return -1;
+    if (bLower === lowerQuery) return 1;
+    if (aLower.startsWith(lowerQuery) && !bLower.startsWith(lowerQuery))
+      return -1;
+    if (bLower.startsWith(lowerQuery) && !aLower.startsWith(lowerQuery))
+      return 1;
+
+    return a.name.localeCompare(b.name);
+  });
+
+  const finalResults = results.slice(0, limit);
+
+  return finalResults;
+}
+
+/**
+ * Disabled emotes management (stored in localStorage as array of names)
+ */
+const DISABLED_EMOTES_KEY = 'disabled_emotes_v1';
+
+export function getDisabledEmotes(): Set<string> {
+  try {
+    const raw = localStorage.getItem(DISABLED_EMOTES_KEY);
+    if (!raw) return new Set();
+    const arr = JSON.parse(raw) as string[];
+    return new Set(arr);
+  } catch {
+    return new Set();
+  }
+}
+
+export function isEmoteDisabled(name: string): boolean {
+  return getDisabledEmotes().has(name);
+}
+
+export function toggleDisableEmote(name: string): void {
+  try {
+    const set = getDisabledEmotes();
+    if (set.has(name)) set.delete(name);
+    else set.add(name);
+    localStorage.setItem(DISABLED_EMOTES_KEY, JSON.stringify(Array.from(set)));
+
+    // Notify listeners (reuse emotes-reloaded so UI refreshes emote lists and autocomplete)
+    if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function') {
+      window.dispatchEvent(new Event('emotes-reloaded'));
+    }
+  } catch (e) {
+    console.warn('Failed to toggle emote disabled state', e);
+  }
+}
+
+/**
+ * Get all emotes organized by source
+ */
+export interface EmotesBySource {
+  twitch: Array<{ name: string; url: string }>;
+  "7tv": Array<{ name: string; url: string }>;
+  bttv: Array<{ name: string; url: string }>;
+  ffz: Array<{ name: string; url: string }>;
+}
+
+export function getAllEmotesOrganized(): EmotesBySource {
+  const organized = {
+    twitch: Object.entries(emotesTwitch)
+      .map(([name, url]) => ({ name, url }))
+      .sort((a, b) => a.name.localeCompare(b.name)),
+    "7tv": Object.entries(emotes7tv)
+      .map(([name, url]) => ({ name, url }))
+      .sort((a, b) => a.name.localeCompare(b.name)),
+    bttv: Object.entries(emotesBttv)
+      .map(([name, url]) => ({ name, url }))
+      .sort((a, b) => a.name.localeCompare(b.name)),
+    ffz: Object.entries(emotesFfz)
+      .map(([name, url]) => ({ name, url }))
+      .sort((a, b) => a.name.localeCompare(b.name)),
+  };
+
+  // Debug log to verify emotes are loaded
+  console.log("Emotes organized:", {
+    twitch: organized.twitch.length,
+    "7tv": organized["7tv"].length,
+    bttv: organized.bttv.length,
+    ffz: organized.ffz.length,
+  });
+
+  return organized;
+}

src/lib/streamMonitor.ts

@@ -0,0 +1,129 @@
+import { getStreamStatuses } from "./twitch";
+import type { PlatformSession } from "./types";
+
+export interface StreamerToWatch {
+  id: string;
+  name: string;
+  displayName: string;
+  profileImageUrl?: string;
+}
+
+export interface LiveStreamer extends StreamerToWatch {
+  isLive: true;
+  title?: string;
+  viewerCount?: number;
+}
+
+/**
+ * Check which streamers from a list are currently live
+ * Uses batch API endpoint to check all streamers in a single request
+ */
+export async function checkLiveStreamers(
+  streamersToWatch: StreamerToWatch[],
+  accessToken: string,
+  clientId: string,
+): Promise<LiveStreamer[]> {
+  if (!streamersToWatch.length) return [];
+
+  try {
+    const streamerIds = streamersToWatch.map((s) => s.id);
+
+    // Use batch endpoint to check all streamers in one API call
+    const statuses = await getStreamStatuses(
+      accessToken,
+      clientId,
+      streamerIds,
+    );
+
+    const liveStreamers: LiveStreamer[] = streamersToWatch
+      .filter((streamer) => statuses[streamer.id]?.isLive)
+      .map((streamer) => ({
+        ...streamer,
+        isLive: true as const,
+        title: statuses[streamer.id]?.title,
+        viewerCount: statuses[streamer.id]?.viewerCount,
+      }));
+
+    return liveStreamers;
+  } catch (error) {
+    console.error("Error checking live streamers:", error);
+    throw error;
+  }
+}
+
+/**
+ * Get watched streamers from localStorage
+ */
+export function getWatchedStreamers(): StreamerToWatch[] {
+  const saved = localStorage.getItem("mixchat_watched_streamers");
+  if (!saved) return [];
+  try {
+    return JSON.parse(saved);
+  } catch (error) {
+    console.error("Failed to parse watched streamers:", error);
+    return [];
+  }
+}
+
+/**
+ * Save watched streamers to localStorage
+ */
+export function saveWatchedStreamers(streamers: StreamerToWatch[]): void {
+  localStorage.setItem("mixchat_watched_streamers", JSON.stringify(streamers));
+}
+
+/**
+ * Add a streamer to watch list
+ */
+export function addWatchedStreamer(streamer: StreamerToWatch): void {
+  const current = getWatchedStreamers();
+  if (!current.find((s) => s.id === streamer.id)) {
+    saveWatchedStreamers([...current, streamer]);
+  }
+}
+
+/**
+ * Remove a streamer from watch list
+ */
+export function removeWatchedStreamer(streamerId: string): void {
+  const current = getWatchedStreamers();
+  saveWatchedStreamers(current.filter((s) => s.id !== streamerId));
+}
+
+/**
+ * Check which streamers have already been notified for
+ */
+export function getNotifiedStreamers(): Set<string> {
+  const saved = localStorage.getItem("mixchat_notified_streamers");
+  if (!saved) return new Set();
+  try {
+    return new Set(JSON.parse(saved));
+  } catch (error) {
+    console.error("Failed to parse notified streamers:", error);
+    return new Set();
+  }
+}
+
+/**
+ * Mark a streamer as notified
+ */
+export function markStreamerNotified(streamerId: string): void {
+  const notified = getNotifiedStreamers();
+  notified.add(streamerId);
+  localStorage.setItem(
+    "mixchat_notified_streamers",
+    JSON.stringify(Array.from(notified)),
+  );
+}
+
+/**
+ * Mark a streamer as not notified (when they go offline)
+ */
+export function markStreamerOffline(streamerId: string): void {
+  const notified = getNotifiedStreamers();
+  notified.delete(streamerId);
+  localStorage.setItem(
+    "mixchat_notified_streamers",
+    JSON.stringify(Array.from(notified)),
+  );
+}

src/lib/twitch.ts

@@ -0,0 +1,629 @@
+import type { PlatformSession, ChatMessage } from "./types.js";
+import { getBadge, getBadgeDetail } from "./badges.js";
+
+const TWITCH_API_BASE = "https://api.twitch.tv/helix";
+const TWITCH_AUTH_BASE = "https://id.twitch.tv/oauth2";
+const BATCH_SIZE = 100;
+
+export const getTwitchAccessToken = async (
+  code: string,
+  clientId: string,
+  clientSecret: string,
+  redirectUri: string,
+) => {
+  try {
+    const response = await fetch(`${TWITCH_AUTH_BASE}/token`, {
+      method: "POST",
+      headers: { "Content-Type": "application/x-www-form-urlencoded" },
+      body: new URLSearchParams({
+        client_id: clientId,
+        client_secret: clientSecret,
+        code,
+        grant_type: "authorization_code",
+        redirect_uri: redirectUri,
+      }),
+    });
+
+    const data = await response.json();
+    return {
+      accessToken: data.access_token,
+      refreshToken: data.refresh_token,
+      expiresIn: data.expires_in,
+    };
+  } catch (error) {
+    console.error("Twitch token exchange failed:", error);
+    throw error;
+  }
+};
+
+export const refreshTwitchAccessToken = async (
+  refreshToken: string,
+  clientId: string,
+  clientSecret: string,
+) => {
+  try {
+    const response = await fetch(`${TWITCH_AUTH_BASE}/token`, {
+      method: "POST",
+      headers: { "Content-Type": "application/x-www-form-urlencoded" },
+      body: new URLSearchParams({
+        client_id: clientId,
+        client_secret: clientSecret,
+        refresh_token: refreshToken,
+        grant_type: "refresh_token",
+      }),
+    });
+
+    if (!response.ok) {
+      throw new Error(`Failed to refresh token: ${response.status}`);
+    }
+
+    const data = await response.json();
+    return {
+      accessToken: data.access_token,
+      refreshToken: data.refresh_token || refreshToken,
+      expiresIn: data.expires_in,
+    };
+  } catch (error) {
+    console.error("Twitch token refresh failed:", error);
+    throw error;
+  }
+};
+
+export const getTwitchUser = async (accessToken: string, clientId: string) => {
+  try {
+    const response = await fetch(`${TWITCH_API_BASE}/users`, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+        "Client-ID": clientId,
+      },
+    });
+
+    if (!response.ok) {
+      throw new Error(
+        `Twitch API error: ${response.status} ${response.statusText}`,
+      );
+    }
+
+    const data = await response.json();
+
+    if (!data.data || !data.data[0]) {
+      throw new Error("No user data returned from Twitch API");
+    }
+
+    const user = data.data[0];
+    return {
+      userId: user.id,
+      displayName: user.display_name,
+      login: user.login,
+      profileImageUrl: user.profile_image_url,
+    };
+  } catch (error) {
+    console.error("Failed to get Twitch user:", error);
+    throw error;
+  }
+};
+
+export const getTwitchUserById = async (
+  accessToken: string,
+  clientId: string,
+  userId: string,
+) => {
+  try {
+    const response = await fetch(`${TWITCH_API_BASE}/users?id=${userId}`, {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+        "Client-ID": clientId,
+      },
+    });
+
+    if (!response.ok) {
+      throw new Error(
+        `Twitch API error: ${response.status} ${response.statusText}`,
+      );
+    }
+
+    const data = await response.json();
+
+    if (!data.data || !data.data[0]) {
+      return null;
+    }
+
+    const user = data.data[0];
+    return {
+      userId: user.id,
+      displayName: user.display_name,
+      login: user.login,
+      profileImageUrl: user.profile_image_url,
+    };
+  } catch (error) {
+    console.error("Failed to get Twitch user by ID:", error);
+    return null;
+  }
+};
+
+
+export const getFollowedChannels = async (
+  accessToken: string,
+  clientId: string,
+  userId: string,
+) => {
+  try {
+    let followedChannels: any[] = [];
+    let cursor: string | undefined = undefined;
+
+    while (true) {
+      const url = new URL(`${TWITCH_API_BASE}/channels/followed`);
+      url.searchParams.set("user_id", userId);
+      url.searchParams.set("first", "100");
+      if (cursor) {
+        url.searchParams.set("after", cursor);
+      }
+
+      const response = await fetch(url.toString(), {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      });
+
+      if (!response.ok) {
+        if (response.status === 401) {
+          throw new Error(
+            `Twitch API error: 401 - Unauthorized. Token may be expired or invalid.`,
+          );
+        }
+        throw new Error(`Twitch API error: ${response.status}`);
+      }
+
+      const data = await response.json();
+      const pageChannels = (data.data || []).map((channel: any) => ({
+        id: channel.broadcaster_id,
+        name: channel.broadcaster_login,
+        displayName:
+          channel.broadcaster_name ||
+          channel.display_name ||
+          channel.broadcaster_login,
+        title: channel.game_name || "",
+        thumbnail: channel.thumbnail_url,
+      }));
+
+      followedChannels = followedChannels.concat(pageChannels);
+
+      if (data.pagination?.cursor) {
+        cursor = data.pagination.cursor;
+      } else {
+        break;
+      }
+    }
+
+    const batchSize = BATCH_SIZE;
+    for (let i = 0; i < followedChannels.length; i += batchSize) {
+      const batch = followedChannels.slice(i, i + batchSize);
+      const userIds = batch.map((ch: any) => `id=${ch.id}`).join("&");
+
+      const usersResponse = await fetch(`${TWITCH_API_BASE}/users?${userIds}`, {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      });
+
+      if (usersResponse.ok) {
+        const usersData = await usersResponse.json();
+        const userProfiles = new Map(
+          (usersData.data || []).map((user: any) => [
+            user.id,
+            user.profile_image_url,
+          ]),
+        );
+        batch.forEach((ch: any) => {
+          ch.profileImageUrl = userProfiles.get(ch.id);
+        });
+      }
+    }
+
+    const streamDataMap = new Map<string, any>();
+
+    for (let i = 0; i < followedChannels.length; i += batchSize) {
+      const batch = followedChannels.slice(i, i + batchSize);
+      const userIdParams = batch.map((ch: any) => `user_id=${ch.id}`).join("&");
+
+      const streamsResponse = await fetch(
+        `${TWITCH_API_BASE}/streams?${userIdParams}&first=100`,
+        {
+          headers: {
+            Authorization: `Bearer ${accessToken}`,
+            "Client-ID": clientId,
+          },
+        },
+      );
+
+      if (streamsResponse.ok) {
+        const streamsData = await streamsResponse.json();
+        (streamsData.data || []).forEach((s: any) => {
+          streamDataMap.set(s.user_id, s);
+        });
+      }
+    }
+
+    followedChannels.forEach((ch: any) => {
+      if (streamDataMap.has(ch.id)) {
+        ch.viewerCount = streamDataMap.get(ch.id).viewer_count;
+      } else {
+        ch.viewerCount = 0;
+      }
+    });
+
+    // Only return online channels for the sidebar
+    const onlineChannels = followedChannels.filter((ch: any) =>
+      streamDataMap.has(ch.id),
+    );
+
+    const sorted = onlineChannels.sort((a, b) => {
+      const nameA = (a?.displayName || a?.name || "").toLowerCase();
+      const nameB = (b?.displayName || b?.name || "").toLowerCase();
+      return nameA.localeCompare(nameB);
+    });
+
+    return sorted;
+  } catch (error) {
+    console.error("Failed to get followed channels:", error);
+    throw error;
+  }
+};
+
+export const getAllFollowedChannels = async (
+  accessToken: string,
+  clientId: string,
+  userId: string,
+) => {
+  try {
+    let followedChannels: any[] = [];
+    let cursor: string | undefined = undefined;
+
+    while (true) {
+      const url = new URL(`${TWITCH_API_BASE}/channels/followed`);
+      url.searchParams.set("user_id", userId);
+      url.searchParams.set("first", "100");
+      if (cursor) {
+        url.searchParams.set("after", cursor);
+      }
+
+      const response = await fetch(url.toString(), {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      });
+
+      if (!response.ok) {
+        if (response.status === 401) {
+          throw new Error(
+            `Twitch API error: 401 - Unauthorized. Token may be expired or invalid.`,
+          );
+        }
+        throw new Error(`Twitch API error: ${response.status}`);
+      }
+
+      const data = await response.json();
+      const pageChannels = (data.data || []).map((channel: any) => ({
+        id: channel.broadcaster_id,
+        name: channel.broadcaster_login,
+        displayName:
+          channel.broadcaster_name ||
+          channel.display_name ||
+          channel.broadcaster_login,
+        title: channel.game_name || "",
+        thumbnail: channel.thumbnail_url,
+      }));
+
+      followedChannels = followedChannels.concat(pageChannels);
+
+      if (data.pagination?.cursor) {
+        cursor = data.pagination.cursor;
+      } else {
+        break;
+      }
+    }
+
+    const batchSize = BATCH_SIZE;
+    for (let i = 0; i < followedChannels.length; i += batchSize) {
+      const batch = followedChannels.slice(i, i + batchSize);
+      const userIds = batch.map((ch: any) => `id=${ch.id}`).join("&");
+
+      const usersResponse = await fetch(`${TWITCH_API_BASE}/users?${userIds}`, {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      });
+
+      if (usersResponse.ok) {
+        const usersData = await usersResponse.json();
+        const userProfiles = new Map(
+          (usersData.data || []).map((user: any) => [
+            user.id,
+            user.profile_image_url,
+          ]),
+        );
+        batch.forEach((ch: any) => {
+          ch.profileImageUrl = userProfiles.get(ch.id);
+        });
+      }
+    }
+
+    // Fetch stream data to mark which channels are online
+    const streamDataMap = new Map<string, any>();
+
+    for (let i = 0; i < followedChannels.length; i += batchSize) {
+      const batch = followedChannels.slice(i, i + batchSize);
+      const userIdParams = batch.map((ch: any) => `user_id=${ch.id}`).join("&");
+
+      const streamsResponse = await fetch(
+        `${TWITCH_API_BASE}/streams?${userIdParams}&first=100`,
+        {
+          headers: {
+            Authorization: `Bearer ${accessToken}`,
+            "Client-ID": clientId,
+          },
+        },
+      );
+
+      if (streamsResponse.ok) {
+        const streamsData = await streamsResponse.json();
+        (streamsData.data || []).forEach((s: any) => {
+          streamDataMap.set(s.user_id, s);
+        });
+      }
+    }
+
+    followedChannels.forEach((ch: any) => {
+      if (streamDataMap.has(ch.id)) {
+        ch.viewerCount = streamDataMap.get(ch.id).viewer_count;
+      } else {
+        ch.viewerCount = 0;
+      }
+    });
+
+    // Return all followed channels, sorted with online first
+    const sorted = followedChannels.sort((a, b) => {
+      const aIsOnline = streamDataMap.has(a.id) ? 1 : 0;
+      const bIsOnline = streamDataMap.has(b.id) ? 1 : 0;
+
+      if (aIsOnline !== bIsOnline) {
+        return bIsOnline - aIsOnline; // Online channels first
+      }
+
+      const nameA = (a?.displayName || a?.name || "").toLowerCase();
+      const nameB = (b?.displayName || b?.name || "").toLowerCase();
+      return nameA.localeCompare(nameB);
+    });
+
+    return sorted;
+  } catch (error) {
+    console.error("Failed to get all followed channels:", error);
+    throw error;
+  }
+};
+
+export const getStreamStatus = async (
+  accessToken: string,
+  clientId: string,
+  userId: string,
+): Promise<{
+  isLive: boolean;
+  title?: string;
+  viewerCount?: number;
+  startedAt?: Date;
+} | null> => {
+  try {
+    const response = await fetch(
+      `${TWITCH_API_BASE}/streams?user_id=${userId}`,
+      {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      },
+    );
+
+    if (!response.ok) {
+      throw new Error(`Twitch API error: ${response.status}`);
+    }
+
+    const data = await response.json();
+    const stream = data.data?.[0];
+
+    if (!stream) {
+      return { isLive: false };
+    }
+
+    return {
+      isLive: true,
+      title: stream.title,
+      viewerCount: stream.viewer_count,
+      startedAt: new Date(stream.started_at),
+    };
+  } catch (error) {
+    console.error("Failed to get stream status:", error);
+    return null;
+  }
+};
+
+/**
+ * Batch query stream status for multiple users (optimized for rate limiting)
+ * Instead of making N individual requests, makes 1 request with multiple user_ids
+ * Reduces API calls by ~90% when checking multiple streamers
+ */
+export const getStreamStatuses = async (
+  accessToken: string,
+  clientId: string,
+  userIds: string[],
+): Promise<
+  Record<
+    string,
+    { isLive: boolean; title?: string; viewerCount?: number; startedAt?: Date }
+  >
+> => {
+  try {
+    if (!userIds.length) {
+      return {};
+    }
+
+    // Build query with all user IDs
+    const params = userIds.map((id) => `user_id=${id}`).join("&");
+    const response = await fetch(
+      `${TWITCH_API_BASE}/streams?${params}&first=100`,
+      {
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Client-ID": clientId,
+        },
+      },
+    );
+
+    if (!response.ok) {
+      throw new Error(`Twitch API error: ${response.status}`);
+    }
+
+    const data = await response.json();
+    const result: Record<
+      string,
+      {
+        isLive: boolean;
+        title?: string;
+        viewerCount?: number;
+        startedAt?: Date;
+      }
+    > = {};
+
+    // Initialize all user IDs as offline
+    userIds.forEach((id) => {
+      result[id] = { isLive: false };
+    });
+
+    // Update with actual live streams
+    data.data?.forEach((stream: any) => {
+      result[stream.user_id] = {
+        isLive: true,
+        title: stream.title,
+        viewerCount: stream.viewer_count,
+        startedAt: new Date(stream.started_at),
+      };
+    });
+
+    console.log(
+      `Batch stream check: ${userIds.length} streamers checked in 1 request`,
+    );
+    return result;
+  } catch (error) {
+    console.error("Failed to get batch stream status:", error);
+    throw error;
+  }
+};
+
+export const getRecentMessages = async (
+  channelName: string,
+): Promise<ChatMessage[]> => {
+  try {
+    const response = await fetch(
+      `https://recent-messages.robotty.de/api/v2/recent-messages/${channelName}`,
+    );
+
+    if (!response.ok) {
+      console.warn(
+        `Failed to fetch recent messages for ${channelName}:`,
+        response.status,
+      );
+      return [];
+    }
+
+    const data = await response.json();
+
+    const messages: ChatMessage[] = (data.messages || [])
+      .map((rawMsg: string) => {
+        try {
+          const tagsMatch = rawMsg.match(/^@(.+?)\s+:/);
+          const userMatch = rawMsg.match(/\s:([^!]+)!/);
+          const contentMatch = rawMsg.match(/PRIVMSG #[^\s]+ :(.+)$/);
+
+          if (!userMatch || !contentMatch) {
+            console.warn("Failed to parse message:", rawMsg.substring(0, 100));
+            return null;
+          }
+
+          const author = userMatch[1];
+          const content = contentMatch[1];
+
+          // Parse tags
+          let tags: Record<string, string> = {};
+          if (tagsMatch && tagsMatch[1]) {
+            const tagPairs = tagsMatch[1].split(";");
+            tags = Object.fromEntries(
+              tagPairs.map((pair) => {
+                const [key, value] = pair.split("=");
+                return [key, value || ""];
+              }),
+            );
+          }
+
+          let badges: Record<string, string> = {};
+          let badgeDetails: Record<string, { url: string; title: string }> = {};
+          if (tags["badges"]) {
+            tags["badges"].split(",").forEach((badge: string) => {
+              const [name, version] = badge.split("/");
+              const detail = getBadgeDetail(name, version);
+              if (detail) {
+                badges[name] = detail.url;
+                badgeDetails[name] = { url: detail.url, title: detail.title };
+              }
+            });
+          }
+
+          let emotes: Record<string, string[]> = {};
+          if (tags["emotes"] && tags["emotes"] !== "") {
+            emotes = Object.fromEntries(
+              tags["emotes"].split("/").map((emote: string) => {
+                const [id, positions] = emote.split(":");
+                return [id, positions.split(",")];
+              }),
+            );
+          }
+
+          // Use the actual Twitch message ID if available, otherwise fall back to a composite ID
+          const messageId = tags["id"] || `${tags["user-id"] || "unknown"}_${tags["tmi-sent-ts"] || Date.now()}`;
+
+          const message: ChatMessage = {
+            id: messageId,
+            platform: "twitch",
+            author,
+            content,
+            timestamp: new Date(parseInt(tags["tmi-sent-ts"]) || Date.now()),
+            userId: tags["user-id"] || "",
+            authorColor: tags["color"] || "#FFFFFF",
+            badges,
+            badgeDetails,
+            emotes,
+            isBot: tags["bot"] === "1",
+            mentionsUser: false,
+            isPreloaded: true, // Mark as preloaded historical message
+          };
+
+          return message;
+        } catch (error) {
+          console.error(
+            "Error parsing message:",
+            rawMsg.substring(0, 100),
+            error,
+          );
+          return null;
+        }
+      })
+      .filter((msg: ChatMessage | null): msg is ChatMessage => msg !== null);
+
+    return messages;
+  } catch (error) {
+    console.error("Failed to fetch recent messages:", error);
+    return [];
+  }
+};

src/lib/types.ts

@@ -0,0 +1,51 @@
+export const PLATFORMS = ["twitch", "youtube"] as const;
+export type Platform = (typeof PLATFORMS)[number];
+
+export const MESSAGE_TYPES = [
+  "chat",
+  "cheer",
+  "subscription",
+  "resub",
+  "subgift",
+  "redemption",
+] as const;
+export type MessageType = (typeof MESSAGE_TYPES)[number];
+
+export interface ChatMessage {
+  id: string;
+  platform: Platform;
+  author: string;
+  content: string;
+  timestamp: Date;
+  authorAvatar?: string;
+  authorColor?: string;
+  userId?: string;
+  mentionsUser?: boolean;
+  emotes?: Record<string, string[]>; // Twitch emote data: emoteId -> positions
+  replyTo?: {
+    id: string;
+    author: string;
+    content: string;
+  };
+  isBot?: boolean;
+  badges?: Record<string, string>; // badgeName -> imageUrl
+  badgeDetails?: Record<string, { url: string; title: string }>; // detailed badge info
+  isCurrentUser?: boolean; // True if message is from the logged-in user
+  optimistic?: boolean; // True if this message is a local optimistic placeholder
+  isPreloaded?: boolean; // True if message is from historical data (not live chat)
+  messageType?: MessageType; // Type of message (chat, cheer, subscription, etc.)
+  rewardId?: string; // ID of the redeemed reward
+}
+
+export interface PlatformSession {
+  platform: Platform;
+  accessToken: string;
+  refreshToken?: string;
+  expiresAt?: number;
+  userId: string;
+  displayName: string;
+  username?: string;
+  profileImageUrl?: string;
+  badges?: Record<string, string>; // badgeName -> imageUrl
+  badgeDetails?: Record<string, { url: string; title: string }>; // detailed badge info
+}

src/lib/version.ts

@@ -0,0 +1,6 @@
+/**
+ * App version constant
+ * Update here to reflect current release version
+ */
+export const APP_VERSION = "0.5.0-beta";
+export const DISPLAY_VERSION = "Beta 0.5";

src/lib/youtube.ts

@@ -0,0 +1,114 @@
+/**
+ * YouTube OAuth and API Client
+ */
+
+export interface YouTubeTokenResponse {
+  access_token: string;
+  refresh_token?: string;
+  expires_in: number;
+  token_type: string;
+}
+
+export interface YouTubeUser {
+  userId: string;
+  displayName: string;
+  profileImageUrl: string;
+}
+
+/**
+ * Exchange authorization code for access token
+ */
+export async function getYoutubeAccessToken(
+  code: string,
+  clientId: string,
+  clientSecret: string,
+  redirectUri: string,
+): Promise<YouTubeTokenResponse> {
+  const params = new URLSearchParams({
+    code,
+    client_id: clientId,
+    client_secret: clientSecret,
+    redirect_uri: redirectUri,
+    grant_type: "authorization_code",
+  });
+
+  const response = await fetch("https://oauth2.googleapis.com/token", {
+    method: "POST",
+    body: params,
+    headers: {
+      "Content-Type": "application/x-www-form-urlencoded",
+    },
+  });
+
+  if (!response.ok) {
+    throw new Error(
+      `Failed to get YouTube access token: ${response.statusText}`,
+    );
+  }
+
+  return response.json();
+}
+
+/**
+ * Get YouTube user information
+ */
+export async function getYoutubeUser(
+  accessToken: string,
+): Promise<YouTubeUser> {
+  const response = await fetch(
+    "https://www.googleapis.com/youtube/v3/channels?part=snippet&mine=true",
+    {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    },
+  );
+
+  if (!response.ok) {
+    throw new Error(`Failed to get YouTube user: ${response.statusText}`);
+  }
+
+  const data = await response.json();
+
+  if (!data.items || data.items.length === 0) {
+    throw new Error("No YouTube channel found");
+  }
+
+  const channel = data.items[0];
+
+  return {
+    userId: channel.id,
+    displayName: channel.snippet.title,
+    profileImageUrl: channel.snippet.thumbnails?.default?.url || "",
+  };
+}
+
+/**
+ * Refresh YouTube access token
+ */
+export async function refreshYoutubeToken(
+  refreshToken: string,
+  clientId: string,
+  clientSecret: string,
+): Promise<YouTubeTokenResponse> {
+  const params = new URLSearchParams({
+    refresh_token: refreshToken,
+    client_id: clientId,
+    client_secret: clientSecret,
+    grant_type: "refresh_token",
+  });
+
+  const response = await fetch("https://oauth2.googleapis.com/token", {
+    method: "POST",
+    body: params,
+    headers: {
+      "Content-Type": "application/x-www-form-urlencoded",
+    },
+  });
+
+  if (!response.ok) {
+    throw new Error(`Failed to refresh YouTube token: ${response.statusText}`);
+  }
+
+  return response.json();
+}

src/lib/youtubeLinks.ts

@@ -0,0 +1,50 @@
+/**
+ * YouTube channel linking helpers.
+ * Stores a mapping of Twitch channel ID -> YouTube channel URL in localStorage.
+ */
+
+const STORAGE_KEY = "mixchat_youtube_links";
+
+export interface YouTubeLink {
+  twitchChannelId: string;
+  twitchDisplayName: string;
+  youtubeUrl: string;
+}
+
+export function getYoutubeLinks(): YouTubeLink[] {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY);
+    return raw ? JSON.parse(raw) : [];
+  } catch {
+    return [];
+  }
+}
+
+export function addYoutubeLink(link: YouTubeLink): void {
+  const links = getYoutubeLinks();
+  // Replace if already exists for this twitch channel
+  const idx = links.findIndex(
+    (l) => l.twitchChannelId === link.twitchChannelId,
+  );
+  if (idx >= 0) {
+    links[idx] = link;
+  } else {
+    links.push(link);
+  }
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(links));
+}
+
+export function removeYoutubeLink(twitchChannelId: string): void {
+  const links = getYoutubeLinks().filter(
+    (l) => l.twitchChannelId !== twitchChannelId,
+  );
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(links));
+}
+
+export function getYoutubeLinkForChannel(
+  twitchChannelId: string,
+): string | null {
+  const links = getYoutubeLinks();
+  const found = links.find((l) => l.twitchChannelId === twitchChannelId);
+  return found?.youtubeUrl ?? null;
+}

src/pages/api/parent-domain.ts

@@ -0,0 +1,13 @@
+import type { APIRoute } from "astro";
+
+export const GET: APIRoute = async ({ request }) => {
+  const hostHeader = request.headers.get("host") || "";
+  const host = hostHeader.split(":")[0];
+  const isIpAddress = /^(\d{1,3}\.){3}\d{1,3}$/.test(host);
+  const parentDomain = isIpAddress ? "mixchat.local" : host;
+
+  return new Response(JSON.stringify({ parentDomain }), {
+    status: 200,
+    headers: { "Content-Type": "application/json" },
+  });
+};

src/pages/api/refresh-token.ts

@@ -0,0 +1,190 @@
+import type { APIRoute } from "astro";
+import { refreshTwitchAccessToken } from "../../lib/twitch";
+import { refreshYoutubeToken } from "../../lib/youtube";
+
+export const POST: APIRoute = async ({ request, cookies }) => {
+  if (request.method !== "POST") {
+    return new Response("Method not allowed", { status: 405 });
+  }
+
+  try {
+    const isDev = import.meta.env.MODE === 'development';
+    const isSecure = !isDev;
+
+    const body = await request.json().catch(() => ({}));
+    const { platform } = body as { platform?: string };
+
+    if (!platform) {
+      return new Response(JSON.stringify({ error: "Platform required" }), {
+        status: 400,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    let accessToken: string | undefined;
+    let refreshTokenOut: string | undefined;
+    let expiresIn: number | undefined;
+
+    if (platform === "twitch") {
+      // Read the refresh token from the secure httpOnly cookie.
+      const refreshToken = cookies.get("twitch_refresh_token")?.value;
+      if (!refreshToken) {
+        return new Response(
+          JSON.stringify({ error: "No refresh token available" }),
+          { status: 401, headers: { "Content-Type": "application/json" } },
+        );
+      }
+
+      const clientId = import.meta.env.PUBLIC_TWITCH_CLIENT_ID;
+      const clientSecret = import.meta.env.TWITCH_CLIENT_SECRET;
+
+      if (!clientId || !clientSecret) {
+        console.error("Missing Twitch credentials in environment");
+        return new Response(
+          JSON.stringify({ error: "Server configuration error" }),
+          {
+            status: 500,
+            headers: { "Content-Type": "application/json" },
+          },
+        );
+      }
+
+      const tokenData = await refreshTwitchAccessToken(
+        refreshToken,
+        clientId,
+        clientSecret,
+      );
+      accessToken = tokenData.accessToken;
+      refreshTokenOut = tokenData.refreshToken;
+      expiresIn = tokenData.expiresIn;
+
+      if (accessToken) {
+        cookies.set("twitch_token", accessToken, {
+          httpOnly: true,
+          secure: isSecure,
+          sameSite: "lax",
+          maxAge: expiresIn || 3600,
+          path: "/",
+        });
+      }
+
+      if (refreshTokenOut) {
+        cookies.set("twitch_refresh_token", refreshTokenOut, {
+          httpOnly: true,
+          secure: isSecure,
+          sameSite: "lax",
+          maxAge: 365 * 24 * 60 * 60,
+          path: "/",
+        });
+      }
+    } else if (platform === "youtube") {
+      // Read the refresh token from the secure httpOnly cookie.
+      const refreshToken = cookies.get("youtube_refresh_token")?.value;
+      if (!refreshToken) {
+        // 401 is expected when user hasn't logged in with YouTube yet
+        return new Response(
+          JSON.stringify({ error: "No refresh token available" }),
+          { status: 401, headers: { "Content-Type": "application/json" } },
+        );
+      }
+
+      const clientId = import.meta.env.PUBLIC_YOUTUBE_CLIENT_ID;
+      const clientSecret = import.meta.env.YOUTUBE_CLIENT_SECRET;
+
+      if (!clientId || !clientSecret) {
+        console.error("Missing YouTube credentials in environment");
+        return new Response(
+          JSON.stringify({ error: "Server configuration error" }),
+          {
+            status: 500,
+            headers: { "Content-Type": "application/json" },
+          },
+        );
+      }
+
+      const tokenData = await refreshYoutubeToken(
+        refreshToken,
+        clientId,
+        clientSecret,
+      );
+      accessToken = tokenData.access_token;
+      refreshTokenOut = tokenData.refresh_token;
+      expiresIn = tokenData.expires_in;
+
+      if (accessToken) {
+        cookies.set("youtube_token", accessToken, {
+          httpOnly: true,
+          secure: isSecure,
+          sameSite: "lax",
+          maxAge: expiresIn || 3600,
+          path: "/",
+        });
+      }
+
+      if (refreshTokenOut) {
+        cookies.set("youtube_refresh_token", refreshTokenOut, {
+          httpOnly: true,
+          secure: isSecure,
+          sameSite: "lax",
+          maxAge: 365 * 24 * 60 * 60,
+          path: "/",
+        });
+      }
+    } else {
+      return new Response(JSON.stringify({ error: "Unsupported platform" }), {
+        status: 400,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    console.log("Token refreshed successfully", {
+      platform,
+      expiresIn,
+      timestamp: new Date().toISOString(),
+    });
+
+    return new Response(
+      JSON.stringify({
+        accessToken,
+        refreshToken: refreshTokenOut,
+        expiresIn,
+      }),
+      {
+        status: 200,
+        headers: { "Content-Type": "application/json" },
+      },
+    );
+  } catch (error) {
+    const errorMessage =
+      error instanceof Error ? error.message : "Unknown error";
+    let statusCode = 500;
+    if (
+      errorMessage.includes("401") ||
+      errorMessage.includes("Invalid refresh token")
+    ) {
+      statusCode = 401;
+    } else if (errorMessage.includes("400")) {
+      statusCode = 400;
+    }
+
+    // Log full details server-side; return only a generic message to the client.
+    console.error("Token refresh failed:", {
+      error: errorMessage,
+      timestamp: new Date().toISOString(),
+      status: statusCode,
+    });
+
+    return new Response(
+      JSON.stringify({
+        error:
+          statusCode === 401
+            ? "Session expired. Please log in again."
+            : "Token refresh failed. Please try again.",
+      }),
+      {
+        status: statusCode,
+        headers: { "Content-Type": "application/json" },
+      },
+    );
+  }
+};

src/pages/api/stream-playlist.ts

@@ -0,0 +1,142 @@
+import type { APIRoute } from "astro";
+
+const GQL_CLIENT_ID = "kimne78kx3ncx6brgo4mv6wki5h1ko";
+
+export const GET: APIRoute = async ({ url }) => {
+  try {
+    const channel = url.searchParams.get("channel");
+    if (!channel) {
+      return new Response(
+        JSON.stringify({ error: "Channel parameter required" }),
+        { status: 400, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Grab a playback access token from Twitch on the server side.
+    // The token is tied to the server's IP, so everything that follows
+    // must also go through the server to avoid 403 errors from the CDN.
+    const gqlRes = await fetch("https://gql.twitch.tv/gql", {
+      method: "POST",
+      headers: {
+        "Client-ID": GQL_CLIENT_ID,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        operationName: "PlaybackAccessToken",
+        extensions: {
+          persistedQuery: {
+            version: 1,
+            sha256Hash:
+              "0828119ded1c13477966434e15800ff57ddacf13ba1911c129dc2200705b0712",
+          },
+        },
+        variables: {
+          isLive: true,
+          login: channel,
+          isVod: false,
+          vodID: "",
+          playerType: "embed",
+        },
+      }),
+    });
+
+    if (!gqlRes.ok) {
+      throw new Error(`Twitch GQL error: ${gqlRes.status}`);
+    }
+
+    const gqlData = await gqlRes.json();
+    const tokenData = gqlData?.data?.streamPlaybackAccessToken;
+
+    if (!tokenData?.value || !tokenData?.signature) {
+      return new Response(
+        JSON.stringify({ error: "Stream not available or channel is offline" }),
+        { status: 404, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Fetch the master playlist from Twitch's CDN using the token we just got.
+    const usherParams = new URLSearchParams({
+      client_id: GQL_CLIENT_ID,
+      token: tokenData.value,
+      sig: tokenData.signature,
+      allow_source: "true",
+      allow_audio_only: "true",
+      allow_spectre: "false",
+      fast_bread: "true",
+      p: String(Math.floor(Math.random() * 999999)),
+    });
+
+    const usherUrl = `https://usher.ttvnw.net/api/channel/hls/${encodeURIComponent(channel)}.m3u8?${usherParams}`;
+    const masterRes = await fetch(usherUrl);
+
+    if (!masterRes.ok) {
+      if (masterRes.status === 404) {
+        return new Response(
+          JSON.stringify({ error: "Channel is offline or does not exist" }),
+          { status: 404, headers: { "Content-Type": "application/json" } },
+        );
+      }
+      throw new Error(`Usher fetch failed: ${masterRes.status}`);
+    }
+
+    const masterText = await masterRes.text();
+
+    // The master playlist lists qualities from best to worst, so the first URL is source quality.
+    const masterLines = masterText.split("\n");
+    let bestVariantUrl = "";
+    for (const line of masterLines) {
+      const trimmed = line.trim();
+      if (trimmed.startsWith("http")) {
+        bestVariantUrl = trimmed;
+        break;
+      }
+    }
+
+    if (!bestVariantUrl) {
+      return new Response(
+        JSON.stringify({ error: "Could not parse master playlist" }),
+        { status: 500, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Fetch the quality-specific sub-playlist. This one contains the actual .ts segment URLs.
+    const variantRes = await fetch(bestVariantUrl);
+    if (!variantRes.ok) {
+      throw new Error(`Variant playlist fetch failed: ${variantRes.status}`);
+    }
+
+    const variantText = await variantRes.text();
+
+    // Rewrite every segment URL to go through our proxy so the browser
+    // doesn't run into CORS issues when HLS.js fetches the video chunks.
+    const rewrittenVariant = variantText
+      .split("\n")
+      .map((line) => {
+        const trimmed = line.trim();
+        if (trimmed.startsWith("http")) {
+          return `/api/stream-segment?url=${encodeURIComponent(trimmed)}`;
+        }
+        return line;
+      })
+      .join("\n");
+
+    return new Response(rewrittenVariant, {
+      status: 200,
+      headers: {
+        "Content-Type": "application/vnd.apple.mpegurl",
+        "Access-Control-Allow-Origin": "*",
+        // Tell HLS.js to always re-fetch — this is a live stream
+        "Cache-Control": "no-cache, no-store",
+      },
+    });
+  } catch (error) {
+    console.error("Stream playlist proxy error:", error);
+    return new Response(
+      JSON.stringify({
+        error:
+          error instanceof Error ? error.message : "Failed to get playlist",
+      }),
+      { status: 500, headers: { "Content-Type": "application/json" } },
+    );
+  }
+};

src/pages/api/stream-segment.ts

@@ -0,0 +1,106 @@
+import type { APIRoute } from "astro";
+
+/**
+ * Hostnames that this proxy is permitted to fetch on behalf of the client.
+ * Twitch stream segments are served exclusively from these CDN domains.
+ * Any URL pointing elsewhere is rejected to prevent SSRF attacks.
+ */
+const ALLOWED_HOSTS = new Set([
+  "video.twitch.tv",
+  "usher.twitchsvc.net",
+  "usher.twitch.tv",
+  "usher.ttvnw.net",
+  "d1m7jfoe9zdc1j.cloudfront.net",  // Twitch CloudFront CDN
+  "vod.twitch.tv",
+  // Twitch HLS CDN — segment URLs are served from dynamic subdomains of ttvnw.net
+  // e.g. use14.playlist.ttvnw.net, vod.us-east-2.aws.ttvnw.net
+]);
+
+// Allow any *.ttvnw.net subdomain (Twitch's primary HLS CDN)
+function isAllowedHost(hostname: string): boolean {
+  return ALLOWED_HOSTS.has(hostname) || hostname.endsWith(".ttvnw.net");
+}
+
+
+export const GET: APIRoute = async ({ url }) => {
+  try {
+    const remote = url.searchParams.get("url");
+    if (!remote) {
+      return new Response(JSON.stringify({ error: "url parameter required" }), {
+        status: 400,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    let parsed: URL;
+    try {
+      parsed = new URL(decodeURIComponent(remote));
+    } catch {
+      return new Response(
+        JSON.stringify({ error: "Invalid URL" }),
+        { status: 400, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Enforce HTTPS and restrict to known Twitch CDN hostnames.
+    if (parsed.protocol !== "https:") {
+      return new Response(
+        JSON.stringify({ error: "Only HTTPS URLs are allowed" }),
+        { status: 400, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    if (!isAllowedHost(parsed.hostname)) {
+      return new Response(
+        JSON.stringify({ error: `Disallowed host: ${parsed.hostname}` }),
+        { status: 400, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Fetch the remote segment/playlist from server-side (avoid browser CORS)
+    const res = await fetch(parsed.href, {
+      headers: {
+        "User-Agent": "Mixchat/1.0",
+        Accept: "*/*",
+      },
+    });
+
+    if (!res.ok) {
+      const text = await res.text().catch(() => "");
+      console.error(
+        "Failed fetching remote segment",
+        res.status,
+        parsed.href,
+        text.slice(0, 200),
+      );
+      return new Response(
+        JSON.stringify({ error: `Remote fetch failed: ${res.status}` }),
+        { status: 502, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Clone response body and forward content-type
+    const contentType =
+      res.headers.get("content-type") || "application/octet-stream";
+    const body = await res.arrayBuffer();
+
+    return new Response(body, {
+      status: 200,
+      headers: {
+        "Content-Type": contentType,
+        "Access-Control-Allow-Origin": "*",
+        // Allow range requests if remote supports it
+        "Accept-Ranges": res.headers.get("accept-ranges") || "bytes",
+      },
+    });
+  } catch (error) {
+    console.error("Stream segment proxy error:", error);
+    return new Response(
+      JSON.stringify({
+        error:
+          error instanceof Error ? error.message : "Failed to proxy segment",
+      }),
+      { status: 500, headers: { "Content-Type": "application/json" } },
+    );
+  }
+};

src/pages/api/stream-url.ts

@@ -0,0 +1,81 @@
+import type { APIRoute } from "astro";
+
+const GQL_CLIENT_ID = "kimne78kx3ncx6brgo4mv6wki5h1ko";
+
+export const GET: APIRoute = async ({ url }) => {
+  try {
+    const channel = url.searchParams.get("channel");
+
+    if (!channel) {
+      return new Response(
+        JSON.stringify({ error: "Channel parameter required" }),
+        { status: 400, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Fetch only the playback access token from Twitch GQL (server-side).
+    // We do NOT fetch the CDN playlist URL here — that must be done by the
+    // browser so that the CDN token is bound to the client's IP, not ours.
+    const gqlRes = await fetch("https://gql.twitch.tv/gql", {
+      method: "POST",
+      headers: {
+        "Client-ID": GQL_CLIENT_ID,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        operationName: "PlaybackAccessToken",
+        extensions: {
+          persistedQuery: {
+            version: 1,
+            sha256Hash:
+              "0828119ded1c13477966434e15800ff57ddacf13ba1911c129dc2200705b0712",
+          },
+        },
+        variables: {
+          isLive: true,
+          login: channel,
+          isVod: false,
+          vodID: "",
+          playerType: "embed",
+        },
+      }),
+    });
+
+    if (!gqlRes.ok) {
+      throw new Error(`Twitch GQL error: ${gqlRes.status}`);
+    }
+
+    const gqlData = await gqlRes.json();
+    const tokenData = gqlData?.data?.streamPlaybackAccessToken;
+
+    if (!tokenData?.value || !tokenData?.signature) {
+      return new Response(
+        JSON.stringify({ error: "Stream not available or channel is offline" }),
+        { status: 404, headers: { "Content-Type": "application/json" } },
+      );
+    }
+
+    // Return the token & sig to the client.
+    // The browser will construct the usher.ttvnw.net URL itself so all CDN
+    // segment requests originate from the correct client IP (fixing 403s).
+    return new Response(
+      JSON.stringify({
+        success: true,
+        token: tokenData.value,
+        sig: tokenData.signature,
+        clientId: GQL_CLIENT_ID,
+        channel,
+      }),
+      { status: 200, headers: { "Content-Type": "application/json" } },
+    );
+  } catch (error) {
+    console.error("Stream URL error:", error);
+    return new Response(
+      JSON.stringify({
+        error:
+          error instanceof Error ? error.message : "Failed to get stream URL",
+      }),
+      { status: 500, headers: { "Content-Type": "application/json" } },
+    );
+  }
+};

src/pages/api/twitch-proxy.ts

@@ -0,0 +1,97 @@
+import type { APIRoute } from "astro";
+
+/**
+ * Allowlist of Twitch Helix API path prefixes this proxy is permitted to call.
+ * Any path not matching one of these is rejected with 400.
+ * This prevents the endpoint being abused to reach arbitrary external services.
+ */
+const ALLOWED_PATH_PREFIXES = [
+    "/helix/chat/emotes/global",
+    "/helix/chat/emotes/user",
+    "/helix/chat/emotes",       // covers /helix/chat/emotes?broadcaster_id=...
+    "/helix/chat/badges/global",
+    "/helix/chat/badges",       // covers /helix/chat/badges?broadcaster_id=...
+] as const;
+
+const TWITCH_API_BASE = "https://api.twitch.tv";
+
+/**
+ * Server-side proxy for Twitch Helix API calls.
+ *
+ * Purpose: The client no longer needs to store the Twitch access token in
+ * localStorage to make Twitch API calls (emotes, badges).  Instead it calls
+ * this endpoint, which reads the token from the httpOnly "twitch_token" cookie
+ * and forwards the request to Twitch on the server side.
+ *
+ * Usage: GET /api/twitch-proxy?path=/helix/chat/emotes/global
+ *        GET /api/twitch-proxy?path=/helix/chat/emotes&broadcaster_id=12345
+ *        GET /api/twitch-proxy?path=/helix/chat/badges/global
+ */
+export const GET: APIRoute = async ({ url, cookies }) => {
+    try {
+        const path = url.searchParams.get("path");
+        if (!path) {
+            return new Response(
+                JSON.stringify({ error: "path parameter required" }),
+                { status: 400, headers: { "Content-Type": "application/json" } },
+            );
+        }
+
+        // Validate the path against the allowlist
+        const isAllowed = ALLOWED_PATH_PREFIXES.some((prefix) =>
+            path === prefix || path.startsWith(prefix + "?") || path.startsWith(prefix + "/"),
+        );
+        if (!isAllowed) {
+            return new Response(
+                JSON.stringify({ error: `Path not permitted: ${path}` }),
+                { status: 400, headers: { "Content-Type": "application/json" } },
+            );
+        }
+
+        // Read the access token from the httpOnly cookie — never from client input.
+        const accessToken = cookies.get("twitch_token")?.value;
+        if (!accessToken) {
+            return new Response(
+                JSON.stringify({ error: "Not authenticated" }),
+                { status: 401, headers: { "Content-Type": "application/json" } },
+            );
+        }
+
+        const clientId = import.meta.env.PUBLIC_TWITCH_CLIENT_ID;
+        if (!clientId) {
+            return new Response(
+                JSON.stringify({ error: "Server configuration error" }),
+                { status: 500, headers: { "Content-Type": "application/json" } },
+            );
+        }
+
+        // Build the full Twitch API URL, forwarding any extra query params from the
+        // original request (e.g. broadcaster_id, user_id, after cursor).
+        const forwardParams = new URLSearchParams(url.searchParams);
+        forwardParams.delete("path"); // "path" is our own param, not Twitch's
+
+        const targetUrl = `${TWITCH_API_BASE}${path}${forwardParams.size > 0 ? `?${forwardParams}` : ""
+            }`;
+
+        const response = await fetch(targetUrl, {
+            headers: {
+                "Client-Id": clientId,
+                Authorization: `Bearer ${accessToken}`,
+                Accept: "application/json",
+            },
+        });
+
+        const data = await response.json();
+
+        return new Response(JSON.stringify(data), {
+            status: response.status,
+            headers: { "Content-Type": "application/json" },
+        });
+    } catch (error) {
+        console.error("Twitch proxy error:", error);
+        return new Response(
+            JSON.stringify({ error: "Proxy request failed" }),
+            { status: 500, headers: { "Content-Type": "application/json" } },
+        );
+    }
+};

src/pages/api/user-info.ts

@@ -0,0 +1,35 @@
+import type { APIRoute } from "astro";
+import { getTwitchUserById } from "../../lib/twitch";
+
+export const GET: APIRoute = async ({ request }) => {
+  const url = new URL(request.url);
+  const userId = url.searchParams.get("userId");
+  const authHeader = request.headers.get("Authorization");
+
+  if (!userId) {
+    return new Response("User ID is required", { status: 400 });
+  }
+
+  if (!authHeader) {
+    return new Response("Authorization header is required", { status: 401 });
+  }
+
+  const accessToken = authHeader.replace("Bearer ", "");
+  const clientId = import.meta.env.PUBLIC_TWITCH_CLIENT_ID;
+
+  try {
+    const user = await getTwitchUserById(accessToken, clientId, userId);
+
+    if (!user) {
+      return new Response("User not found", { status: 404 });
+    }
+
+    return new Response(JSON.stringify(user), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    });
+  } catch (error) {
+    console.error("Failed to fetch user info:", error);
+    return new Response("Internal Server Error", { status: 500 });
+  }
+};

src/pages/api/youtube-chat.ts

@@ -0,0 +1,154 @@
+import type { APIRoute } from "astro";
+
+/**
+ * POST /api/youtube-chat
+ *
+ * Sends a message to a YouTube live chat.
+ *
+ * Body (JSON):
+ *   videoId      – YouTube video ID of the live stream
+ *   message      – Text message to send
+ *   accessToken  – YouTube OAuth2 access token (user must have granted live-chat scope)
+ */
+export const POST: APIRoute = async ({ request }) => {
+  const headers = { "Content-Type": "application/json" };
+
+  try {
+    const body = await request.json();
+    const { videoId, message, accessToken } = body as {
+      videoId?: string;
+      message?: string;
+      accessToken?: string;
+    };
+
+    if (!videoId || !message || !accessToken) {
+      return new Response(
+        JSON.stringify({
+          error: "videoId, message, and accessToken are required",
+        }),
+        { status: 400, headers },
+      );
+    }
+
+    const apiKey = import.meta.env.PUBLIC_YOUTUBE_API_KEY;
+
+    // 1. Get the liveChatId from the video
+    const liveChatResult = await getLiveChatId(videoId, accessToken, apiKey);
+    if (!liveChatResult.liveChatId) {
+      console.error("getLiveChatId failed:", liveChatResult.debugInfo);
+      return new Response(
+        JSON.stringify({
+          error:
+            liveChatResult.debugInfo ||
+            "Could not find live chat for this video. The stream may not be live.",
+        }),
+        { status: 422, headers },
+      );
+    }
+
+    const liveChatId = liveChatResult.liveChatId;
+
+    // 2. Send the message
+    const sendRes = await fetch(
+      "https://www.googleapis.com/youtube/v3/liveChat/messages?part=snippet",
+      {
+        method: "POST",
+        headers: {
+          Authorization: `Bearer ${accessToken}`,
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({
+          snippet: {
+            liveChatId,
+            type: "textMessageEvent",
+            textMessageDetails: {
+              messageText: message,
+            },
+          },
+        }),
+      },
+    );
+
+    if (!sendRes.ok) {
+      const errData = await sendRes.json().catch(() => ({}));
+      const errMsg =
+        errData?.error?.message || `YouTube API error: ${sendRes.status}`;
+      console.error("YouTube send message error:", errData);
+      return new Response(JSON.stringify({ error: errMsg }), {
+        status: sendRes.status,
+        headers,
+      });
+    }
+
+    const result = await sendRes.json();
+    return new Response(JSON.stringify({ success: true, id: result.id }), {
+      status: 200,
+      headers,
+    });
+  } catch (error) {
+    console.error("youtube-chat API error:", error);
+    return new Response(
+      JSON.stringify({
+        error: error instanceof Error ? error.message : "Internal server error",
+      }),
+      { status: 500, headers },
+    );
+  }
+};
+
+/**
+ * Resolve the liveChatId for a given YouTube video.
+ * Uses the API key for video lookup (public data), falls back to access token.
+ */
+async function getLiveChatId(
+  videoId: string,
+  accessToken: string,
+  apiKey?: string,
+): Promise<{ liveChatId: string | null; debugInfo: string }> {
+  // Try with API key first (more reliable for public video data), then fall back to OAuth token
+  const urlBase = `https://www.googleapis.com/youtube/v3/videos?part=liveStreamingDetails&id=${encodeURIComponent(videoId)}`;
+
+  let res: Response;
+  if (apiKey) {
+    res = await fetch(`${urlBase}&key=${apiKey}`);
+  } else {
+    res = await fetch(urlBase, {
+      headers: { Authorization: `Bearer ${accessToken}` },
+    });
+  }
+
+  if (!res.ok) {
+    const errBody = await res.text().catch(() => "");
+    return {
+      liveChatId: null,
+      debugInfo: `YouTube videos.list returned ${res.status}: ${errBody.slice(0, 200)}`,
+    };
+  }
+
+  const data = await res.json();
+
+  if (!data.items || data.items.length === 0) {
+    return {
+      liveChatId: null,
+      debugInfo: `No video found for ID "${videoId}". The video may not exist or may be private.`,
+    };
+  }
+
+  const liveDetails = data.items[0]?.liveStreamingDetails;
+  if (!liveDetails) {
+    return {
+      liveChatId: null,
+      debugInfo: `Video "${videoId}" has no liveStreamingDetails. It may not be a live stream.`,
+    };
+  }
+
+  const chatId = liveDetails.activeLiveChatId;
+  if (!chatId) {
+    return {
+      liveChatId: null,
+      debugInfo: `Video "${videoId}" has liveStreamingDetails but no activeLiveChatId. The stream may have ended.`,
+    };
+  }
+
+  return { liveChatId: chatId, debugInfo: "" };
+}

src/pages/api/youtube-emotes.ts

@@ -0,0 +1,206 @@
+import type { APIRoute } from 'astro';
+
+/**
+ * GET /api/youtube-emotes?videoId=xxx
+ *
+ * Fetches the channel's custom emojis (membership emotes) by scraping the
+ * same YouTube page that the youtube-chat library uses internally.
+ *
+ * YouTube's official Data API v3 does NOT expose channel custom emojis, so
+ * we extract them from ytInitialData embedded in the live-chat frame HTML,
+ * which is the same source the Innertube API returns to the library.
+ */
+
+interface YTEmote {
+    name: string; // shortcut / emojiText, e.g. ":channelName_emote1:"
+    url: string;  // CDN image URL
+    isCustomEmoji: boolean;
+}
+
+export const GET: APIRoute = async ({ url }) => {
+    const videoId = url.searchParams.get('videoId');
+
+    if (!videoId) {
+        return new Response(
+            JSON.stringify({ error: 'videoId query parameter is required' }),
+            { status: 400, headers: { 'Content-Type': 'application/json' } }
+        );
+    }
+
+    try {
+        const emotes = await fetchCustomEmojis(videoId);
+        return new Response(
+            JSON.stringify({ success: true, videoId, emotes }),
+            {
+                status: 200,
+                headers: {
+                    'Content-Type': 'application/json',
+                    // Cache for 5 minutes — emotes don't change mid-stream
+                    'Cache-Control': 'public, max-age=300',
+                },
+            }
+        );
+    } catch (error) {
+        console.error('YouTube emotes fetch error:', error);
+        return new Response(
+            JSON.stringify({
+                error: error instanceof Error ? error.message : 'Failed to fetch emotes',
+                emotes: [],
+            }),
+            { status: 200, headers: { 'Content-Type': 'application/json' } }
+            // Return 200 with empty list instead of 500 — missing emotes is non-fatal
+        );
+    }
+};
+
+async function fetchCustomEmojis(videoId: string): Promise<YTEmote[]> {
+    // Step 1: Fetch the watch page — contains ytInitialData with customEmojis
+    const watchPageUrl = `https://www.youtube.com/watch?v=${videoId}`;
+    const pageRes = await fetch(watchPageUrl, {
+        headers: {
+            // Mimic a browser so YouTube returns the full JS-embedded data
+            'User-Agent':
+                'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 ' +
+                '(KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36',
+            'Accept-Language': 'en-US,en;q=0.9',
+        },
+    });
+
+    if (!pageRes.ok) {
+        throw new Error(`Failed to fetch YouTube watch page: ${pageRes.status}`);
+    }
+
+    const html = await pageRes.text();
+
+    // Step 2: Extract ytInitialData JSON from the page
+    // YouTube embeds it as: var ytInitialData = {...};
+    const initDataMatch = html.match(/var ytInitialData\s*=\s*(\{.+?\});\s*(?:var |<\/script>)/s);
+    if (!initDataMatch) {
+        // Try the live-chat iframe URL instead, which also has customEmojis
+        return fetchCustomEmojisFromChatFrame(videoId, html);
+    }
+
+    let ytInitialData: any;
+    try {
+        ytInitialData = JSON.parse(initDataMatch[1]);
+    } catch {
+        return fetchCustomEmojisFromChatFrame(videoId, html);
+    }
+
+    // Step 3: Walk ytInitialData to find customEmojis.
+    // They live at: contents.liveChatRenderer.customEmojis  (in chat embed data)
+    // or inside engagementPanels → liveChatRenderer
+    const emotes = extractCustomEmojisFromInitData(ytInitialData);
+    if (emotes.length > 0) return emotes;
+
+    // Fallback: try the dedicated live-chat frame
+    return fetchCustomEmojisFromChatFrame(videoId, html);
+}
+
+/** 
+ * Fallback: fetch https://www.youtube.com/live_chat?v=xxx which is the
+ * iframe YouTube embeds for chat. Its ytInitialData has a liveChatRenderer
+ * with customEmojis at the top level.
+ */
+async function fetchCustomEmojisFromChatFrame(
+    videoId: string,
+    _watchHtml?: string
+): Promise<YTEmote[]> {
+    const chatFrameUrl = `https://www.youtube.com/live_chat?v=${videoId}&embed_domain=www.youtube.com`;
+    const res = await fetch(chatFrameUrl, {
+        headers: {
+            'User-Agent':
+                'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 ' +
+                '(KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36',
+            'Accept-Language': 'en-US,en;q=0.9',
+        },
+    });
+
+    if (!res.ok) return [];
+
+    const html = await res.text();
+
+    // ytInitialData is embedded the same way in the chat frame
+    const match = html.match(/var ytInitialData\s*=\s*(\{.+?\});\s*(?:var |<\/script>)/s);
+    if (!match) return [];
+
+    let data: any;
+    try {
+        data = JSON.parse(match[1]);
+    } catch {
+        return [];
+    }
+
+    return extractCustomEmojisFromInitData(data);
+}
+
+/**
+ * Recursively finds any `customEmojis` array in ytInitialData and converts
+ * each entry to our YTEmote shape.
+ *
+ * YouTube's customEmoji entries look like:
+ * {
+ *   emojiId: "UgkX...",
+ *   shortcuts: [":channelName_emote1:"],
+ *   searchTerms: [...],
+ *   image: { thumbnails: [{ url, width, height }, ...], accessibility: ... },
+ *   isCustomEmoji: true
+ * }
+ */
+function extractCustomEmojisFromInitData(data: any): YTEmote[] {
+    // BFS search for a `customEmojis` key anywhere in the tree
+    const queue: any[] = [data];
+    const results: YTEmote[] = [];
+    const seen = new Set<string>();
+
+    while (queue.length > 0) {
+        const node = queue.shift();
+        if (!node || typeof node !== 'object') continue;
+
+        if (Array.isArray(node.customEmojis)) {
+            for (const emoji of node.customEmojis) {
+                const emote = parseCustomEmoji(emoji);
+                if (emote && !seen.has(emote.name)) {
+                    seen.add(emote.name);
+                    results.push(emote);
+                }
+            }
+            // Don't stop — there might be more (e.g. multiple renderers)
+        }
+
+        // Enqueue child nodes (limit depth to avoid huge traversals)
+        for (const key of Object.keys(node)) {
+            const child = node[key];
+            if (child && typeof child === 'object') {
+                queue.push(child);
+            }
+        }
+    }
+
+    return results;
+}
+
+function parseCustomEmoji(emoji: any): YTEmote | null {
+    if (!emoji || typeof emoji !== 'object') return null;
+
+    // Pick the best image URL: prefer a mid-size thumbnail
+    const thumbnails: any[] = emoji.image?.thumbnails ?? [];
+    if (thumbnails.length === 0) return null;
+
+    // Sort ascending by width and pick the smallest that is >= 32px, else the largest
+    const sorted = [...thumbnails].sort((a, b) => (a.width ?? 0) - (b.width ?? 0));
+    const preferred = sorted.find((t) => (t.width ?? 0) >= 32) ?? sorted[sorted.length - 1];
+    const url: string = preferred?.url ?? '';
+    if (!url) return null;
+
+    // Name: prefer the shortcut code (e.g. ":channelName_hi:"), fall back to emojiId
+    const shortcuts: string[] = emoji.shortcuts ?? [];
+    const name = shortcuts[0] || emoji.emojiId || '';
+    if (!name) return null;
+
+    return {
+        name,
+        url,
+        isCustomEmoji: true,
+    };
+}

src/pages/api/youtube-live.ts

@@ -0,0 +1,359 @@
+import type { APIRoute } from "astro";
+
+// Simple in-memory cache and in-flight dedupe to avoid excessive YouTube API calls.
+
+const CHANNEL_CACHE_TTL = 1000 * 60 * 60 * 24; // 24 hours
+const LIVE_CACHE_TTL = 1000 * 60 * 10; // 10 minutes
+
+const channelResolveCache = new Map<
+  string,
+  { channelId: string; expires: number }
+>();
+const liveVideoCache = new Map<
+  string,
+  { videoId: string | null; expires: number }
+>();
+
+const inFlightChannelResolves = new Map<string, Promise<string | null>>();
+const inFlightLiveFinds = new Map<string, Promise<string | null>>();
+
+// Resolve a YouTube channel URL to its active live stream video ID.
+// We use the Data API v3 and some local caching to save on quota.
+export const GET: APIRoute = async ({ url, request }) => {
+  const headers = {
+
+    "Content-Type": "application/json",
+    "Cache-Control": "public, max-age=60, s-maxage=600",
+  };
+
+  try {
+    const channelUrl = url.searchParams.get("channelUrl");
+
+    // Check Authorization header for accessToken
+    const authHeader = url.searchParams.get("accessToken") || (typeof request !== 'undefined' ? (request as any).headers.get("Authorization") : null);
+    const accessToken = authHeader?.startsWith("Bearer ") ? authHeader.substring(7) : authHeader;
+
+    if (!channelUrl) {
+      return new Response(
+        JSON.stringify({ error: "channelUrl parameter is required" }),
+        { status: 400, headers },
+      );
+    }
+
+    const apiKey = import.meta.env.PUBLIC_YOUTUBE_API_KEY;
+    if (!apiKey) {
+      return new Response(
+        JSON.stringify({
+          error: "YouTube API key not configured on the server",
+        }),
+        { status: 500, headers },
+      );
+    }
+
+    // 1. Resolve the channel URL to a channel ID
+    const channelId = await resolveChannelId(channelUrl, apiKey);
+    if (!channelId) {
+      return new Response(
+        JSON.stringify({
+          error: "Could not resolve YouTube channel from the given URL",
+        }),
+        { status: 404, headers },
+      );
+    }
+
+    // 2. If we have an access token, check if it belongs to this channel
+    // This allows finding unlisted or private streams for the logged-in user.
+    if (accessToken) {
+      try {
+        const myChannelId = await getMyChannelId(accessToken);
+        if (myChannelId === channelId) {
+          const liveId = await findMyLiveVideoId(accessToken);
+          if (liveId) {
+            return new Response(JSON.stringify({ videoId: liveId, channelId }), {
+              status: 200,
+              headers,
+            });
+          }
+        }
+      } catch (e) {
+        console.warn("Auth-based live check failed:", e);
+      }
+    }
+
+    // 3. Search for an active live stream on that channel (public)
+    const videoId = await findLiveVideoId(channelId, apiKey);
+    if (!videoId) {
+      // Return 200 with null videoId instead of 404 to avoid console errors.
+      // 404 is still technically correct (the live stream resource isn't there),
+      // but it causes noise in browser developer tools for periodic polling.
+      return new Response(
+        JSON.stringify({
+          videoId: null,
+          error: "No active live stream found for this channel",
+          channelId,
+        }),
+        { status: 200, headers },
+      );
+    }
+
+    return new Response(JSON.stringify({ videoId, channelId }), {
+      status: 200,
+      headers,
+    });
+
+  } catch (error) {
+    console.error("youtube-live API error:", error);
+    return new Response(
+      JSON.stringify({
+        error: error instanceof Error ? error.message : "Internal server error",
+      }),
+      { status: 500, headers },
+    );
+  }
+};
+
+/**
+ * Uses a YouTube access token to find the authorized user's channel ID.
+ */
+async function getMyChannelId(accessToken: string): Promise<string | null> {
+  const res = await fetch(
+    "https://www.googleapis.com/youtube/v3/channels?part=id&mine=true",
+    {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    }
+  );
+
+  if (!res.ok) return null;
+  const data = await res.json();
+  if (data.items && data.items.length > 0) {
+    return data.items[0].id;
+  }
+  return null;
+}
+
+
+/**
+ * Uses a YouTube access token to find the currently active live broadcast for the authorized user.
+ */
+async function findMyLiveVideoId(accessToken: string): Promise<string | null> {
+  const res = await fetch(
+    "https://www.googleapis.com/youtube/v3/liveBroadcasts?part=id&broadcastStatus=active&mine=true",
+    {
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+      },
+    }
+  );
+
+  if (!res.ok) {
+    if (res.status === 401) throw new Error("Unauthorized");
+    return null;
+  }
+
+  const data = await res.json();
+  if (data.items && data.items.length > 0) {
+    // Return the video ID (the broadcast ID is identical to the video ID)
+    return data.items[0].id;
+  }
+  return null;
+}
+
+
+
+
+// Helper to resolve different styles of YouTube URLs (handles, channel IDs, etc) 
+// and return the core channel ID.
+async function resolveChannelId(
+  channelUrl: string,
+  apiKey: string,
+): Promise<string | null> {
+  const now = Date.now();
+
+  // Return cached mapping if available
+  const cached = channelResolveCache.get(channelUrl);
+  if (cached && cached.expires > now) {
+    return cached.channelId;
+  }
+
+  // Deduplicate concurrent resolves for the same URL
+  if (inFlightChannelResolves.has(channelUrl)) {
+    return await inFlightChannelResolves.get(channelUrl)!;
+  }
+
+  const promise = (async () => {
+    let parsed: URL;
+    try {
+      parsed = new URL(channelUrl);
+    } catch {
+      return null;
+    }
+
+    const pathname = parsed.pathname; // e.g. /@lunateac or /channel/UCxyz
+
+    // Direct channel ID
+    if (pathname.startsWith("/channel/")) {
+      const id = pathname.replace("/channel/", "").split("/")[0];
+      channelResolveCache.set(channelUrl, {
+        channelId: id,
+        expires: now + CHANNEL_CACHE_TTL,
+      });
+      return id;
+    }
+
+    // Handle-based URL (@handle)
+    if (pathname.startsWith("/@")) {
+      const handle = pathname.replace("/@", "").split("/")[0];
+      const id = await resolveHandleViaApi(handle, apiKey);
+      if (id)
+        channelResolveCache.set(channelUrl, {
+          channelId: id,
+          expires: now + CHANNEL_CACHE_TTL,
+        });
+      return id;
+    }
+
+    // /c/CustomName or /user/Username – try forUsername first, then search
+    if (pathname.startsWith("/c/") || pathname.startsWith("/user/")) {
+      const name = pathname.split("/")[2];
+      const id = await resolveByUsernameOrSearch(name, apiKey);
+      if (id)
+        channelResolveCache.set(channelUrl, {
+          channelId: id,
+          expires: now + CHANNEL_CACHE_TTL,
+        });
+      return id;
+    }
+
+    // Fallback: treat last segment as possible handle
+    const segments = pathname.split("/").filter(Boolean);
+    if (segments.length > 0) {
+      const id = await resolveHandleViaApi(
+        segments[segments.length - 1],
+        apiKey,
+      );
+      if (id)
+        channelResolveCache.set(channelUrl, {
+          channelId: id,
+          expires: now + CHANNEL_CACHE_TTL,
+        });
+      return id;
+    }
+
+    return null;
+  })();
+
+  inFlightChannelResolves.set(channelUrl, promise);
+  try {
+    return await promise;
+  } finally {
+    inFlightChannelResolves.delete(channelUrl);
+  }
+}
+
+async function resolveHandleViaApi(
+  handle: string,
+  apiKey: string,
+): Promise<string | null> {
+  // YouTube Data API v3 – channels.list with forHandle
+  const res = await fetch(
+    `https://www.googleapis.com/youtube/v3/channels?part=id&forHandle=${encodeURIComponent(handle)}&key=${apiKey}`,
+  );
+  if (!res.ok) {
+    console.warn(`YouTube API channels.list forHandle failed: ${res.status}`);
+    // Fallback to search
+    return resolveByUsernameOrSearch(handle, apiKey);
+  }
+  const data = await res.json();
+  if (data.items && data.items.length > 0) {
+    return data.items[0].id;
+  }
+  // Fallback to search
+  return resolveByUsernameOrSearch(handle, apiKey);
+}
+
+async function resolveByUsernameOrSearch(
+  name: string,
+  apiKey: string,
+): Promise<string | null> {
+  // Try forUsername
+  const res = await fetch(
+    `https://www.googleapis.com/youtube/v3/channels?part=id&forUsername=${encodeURIComponent(name)}&key=${apiKey}`,
+  );
+  if (res.ok) {
+    const data = await res.json();
+    if (data.items && data.items.length > 0) {
+      return data.items[0].id;
+    }
+  }
+
+  // Last resort: search for the channel name
+  const searchRes = await fetch(
+    `https://www.googleapis.com/youtube/v3/search?part=snippet&q=${encodeURIComponent(name)}&type=channel&maxResults=1&key=${apiKey}`,
+  );
+  if (searchRes.ok) {
+    const searchData = await searchRes.json();
+    if (searchData.items && searchData.items.length > 0) {
+      return searchData.items[0].snippet.channelId;
+    }
+  }
+
+  return null;
+}
+
+// Check if a channel actually has a live stream running right now
+async function findLiveVideoId(
+  channelId: string,
+  apiKey: string,
+): Promise<string | null> {
+  const now = Date.now();
+
+  // Check cache first
+  const cached = liveVideoCache.get(channelId);
+  if (cached && cached.expires > now) {
+    return cached.videoId;
+  }
+
+  // Dedupe concurrent lookups
+  if (inFlightLiveFinds.has(channelId)) {
+    return await inFlightLiveFinds.get(channelId)!;
+  }
+
+  const promise = (async () => {
+    const res = await fetch(
+      `https://www.googleapis.com/youtube/v3/search?part=id&channelId=${channelId}&eventType=live&type=video&maxResults=1&key=${apiKey}`,
+    );
+    if (!res.ok) {
+      console.warn(`YouTube search for live video failed: ${res.status}`);
+      // Cache negative result for a short period to avoid thundering retry
+      liveVideoCache.set(channelId, {
+        videoId: null,
+        expires: now + LIVE_CACHE_TTL,
+      });
+      return null;
+    }
+    const data = await res.json();
+    if (data.items && data.items.length > 0) {
+      const vid = data.items[0].id.videoId;
+      liveVideoCache.set(channelId, {
+        videoId: vid,
+        expires: now + LIVE_CACHE_TTL,
+      });
+      return vid;
+    }
+    // No live video found — cache null for a short period
+    liveVideoCache.set(channelId, {
+      videoId: null,
+      expires: now + LIVE_CACHE_TTL,
+    });
+    return null;
+  })();
+
+  inFlightLiveFinds.set(channelId, promise);
+  try {
+    return await promise;
+  } finally {
+    inFlightLiveFinds.delete(channelId);
+  }
+}

src/pages/api/youtube-stream-chat.ts

@@ -0,0 +1,243 @@
+import type { APIRoute } from 'astro';
+import { LiveChat } from 'youtube-chat';
+
+// Handle YouTube chat via the youtube-chat library.
+// We cache the chat connection in a global to avoid firing it up on every request.
+
+interface MessagePart {
+  type: 'text' | 'emoji';
+  text?: string;        // for text parts
+  url?: string;         // for emoji/emote parts
+  alt?: string;         // for emoji/emote parts
+  emojiText?: string;   // shortcode like ":slightly_smiling_face:"
+  isCustomEmoji?: boolean;
+}
+
+interface ChatMessage {
+  id: string;
+  author: string;
+  authorAvatar?: string;
+  badges?: Record<string, string>;
+  parts: MessagePart[];
+  timestamp: Date;
+  superchat?: {
+    amount: string;
+    color: string;
+    sticker?: {
+      url: string;
+      alt: string;
+    };
+  };
+}
+
+interface YTEmoteEntry {
+  name: string;
+  url: string;
+  isCustomEmoji: boolean;
+}
+
+// Global map to store active LiveChat instances and their message caches
+const activeLiveChats = new Map<
+  string,
+  {
+    chat: LiveChat;
+    messages: ChatMessage[];
+    /** Deduplicated emote registry: name → entry */
+    emoteMap: Map<string, YTEmoteEntry>;
+    lastUpdate: number;
+  }
+>();
+
+export const GET: APIRoute = async ({ url }) => {
+  const videoId = url.searchParams.get('videoId');
+
+  if (!videoId) {
+    return new Response(
+      JSON.stringify({ error: 'videoId query parameter is required' }),
+      { status: 400, headers: { 'Content-Type': 'application/json' } }
+    );
+  }
+
+  try {
+    let chatSession = activeLiveChats.get(videoId);
+
+    // Create a new LiveChat session if one doesn't exist
+    if (!chatSession) {
+      // Use a lock-like mechanism to prevent duplicate sessions from concurrent requests
+      const chat = new LiveChat({
+        liveId: videoId,
+      });
+
+      const messages: ChatMessage[] = [];
+      const emoteMap = new Map<string, YTEmoteEntry>();
+
+      // Handle incoming messages
+      chat.on('chat', (chatItem: any) => {
+        // Use the library's message ID if available, otherwise generate a stable one
+        // chatItem.id is the actual unique ID from YouTube if the library provides it.
+        const messageId = chatItem.id || `${chatItem.author?.channelId || 'anon'}-${chatItem.timestamp?.getTime() || Date.now()}`;
+
+        // Deduplicate messages by ID to prevent duplicates if the scraper re-emits them
+        if (messages.some(m => m.id === messageId)) {
+          return;
+        }
+
+        // Convert raw message parts into our typed MessagePart array.
+        const parts: MessagePart[] = (chatItem.message || []).map((msg: any) => {
+          if (msg.url) {
+            const name = msg.emojiText || msg.alt || msg.url;
+            if (!emoteMap.has(name)) {
+              emoteMap.set(name, {
+                name,
+                url: msg.url,
+                isCustomEmoji: !!msg.isCustomEmoji,
+              });
+            }
+            return {
+              type: 'emoji' as const,
+              url: msg.url,
+              alt: msg.alt || msg.emojiText || '',
+              emojiText: msg.emojiText || '',
+              isCustomEmoji: !!msg.isCustomEmoji,
+            };
+          }
+          return { type: 'text' as const, text: msg.text ?? String(msg) };
+        });
+
+        const message: ChatMessage = {
+          id: messageId,
+          author: chatItem.author.name || 'Anonymous',
+          authorAvatar: chatItem.author.thumbnail?.url,
+          badges: chatItem.author.badge ? { [chatItem.author.badge.title]: chatItem.author.badge.thumbnail?.url } : undefined,
+          parts,
+          timestamp: chatItem.timestamp || new Date(),
+          superchat: chatItem.superchat ? {
+            amount: chatItem.superchat.amount,
+            color: chatItem.superchat.color,
+            sticker: chatItem.superchat.sticker ? {
+              url: chatItem.superchat.sticker.url,
+              alt: chatItem.superchat.sticker.alt,
+            } : undefined,
+          } : undefined,
+        };
+
+        messages.push(message);
+        // Keep only last 200 messages
+        if (messages.length > 200) {
+          messages.shift();
+        }
+      });
+
+      // Handle errors
+      chat.on('error', (err: any) => {
+        console.error('YouTube LiveChat error:', err);
+        // Clean up failed session after 30 seconds
+        setTimeout(() => {
+          if (activeLiveChats.get(videoId)?.chat === chat) {
+            activeLiveChats.delete(videoId);
+          }
+        }, 30000);
+      });
+
+      // Handle stream end
+      chat.on('end', () => {
+        console.log('YouTube stream ended for videoId:', videoId);
+        if (activeLiveChats.get(videoId)?.chat === chat) {
+          activeLiveChats.delete(videoId);
+        }
+      });
+
+      // Start the chat connection
+      const ok = await chat.start();
+      if (!ok) {
+        return new Response(
+          JSON.stringify({ error: 'Failed to connect to YouTube chat' }),
+          { status: 500, headers: { 'Content-Type': 'application/json' } }
+        );
+      }
+
+      chatSession = {
+        chat,
+        messages,
+        emoteMap,
+        lastUpdate: Date.now(),
+      };
+
+      // Check if another request beat us to it while we were waiting for chat.start()
+      const existing = activeLiveChats.get(videoId);
+      if (existing) {
+        // If an existing session exists, stop this one to avoid double scraping
+        chat.stop();
+        chatSession = existing;
+      } else {
+        activeLiveChats.set(videoId, chatSession);
+        console.log(`Created LiveChat session for videoId: ${videoId}`);
+      }
+
+      // Try to get channel emotes in the background so autocomplete is snappy.
+      // This pulls from the initial data scrape so users don't have to wait for them to appear in chat.
+      (async () => {
+        try {
+          // Build an absolute URL from the current request's origin
+          const origin = url.origin;
+          const emoteRes = await fetch(
+            `${origin}/api/youtube-emotes?videoId=${encodeURIComponent(videoId)}`
+          );
+          if (emoteRes.ok) {
+            const emoteData = await emoteRes.json();
+            if (Array.isArray(emoteData.emotes)) {
+              const session = activeLiveChats.get(videoId);
+              if (session) {
+                for (const e of emoteData.emotes) {
+                  if (e.name && e.url && !session.emoteMap.has(e.name)) {
+                    session.emoteMap.set(e.name, {
+                      name: e.name,
+                      url: e.url,
+                      isCustomEmoji: true,
+                    });
+                  }
+                }
+                console.log(
+                  `Pre-loaded ${emoteData.emotes.length} channel emotes for videoId: ${videoId}`
+                );
+              }
+            }
+          }
+        } catch (err) {
+          // Non-fatal — emotes will still accumulate from chat messages
+          console.warn('Failed to pre-load YouTube emotes:', err);
+        }
+      })();
+
+    }
+
+    // Update last access time
+    chatSession.lastUpdate = Date.now();
+
+    return new Response(
+      JSON.stringify({
+        success: true,
+        videoId,
+        messages: chatSession.messages,
+        messageCount: chatSession.messages.length,
+        // All unique emotes/emoji seen so far across all messages
+        emotes: Array.from(chatSession.emoteMap.values()),
+      }),
+      {
+        status: 200,
+        headers: {
+          'Content-Type': 'application/json',
+          'Cache-Control': 'no-cache',
+        },
+      }
+    );
+  } catch (error) {
+    console.error('YouTube stream chat API error:', error);
+    return new Response(
+      JSON.stringify({
+        error: error instanceof Error ? error.message : 'Internal server error',
+      }),
+      { status: 500, headers: { 'Content-Type': 'application/json' } }
+    );
+  }
+};

src/pages/auth/twitch/callback.ts

@@ -0,0 +1,142 @@
+import type { APIRoute } from "astro";
+import { getTwitchAccessToken, getTwitchUser } from "../../../lib/twitch";
+
+export const GET: APIRoute = async ({ url, cookies }) => {
+  const code = url.searchParams.get("code");
+  const returnedState = url.searchParams.get("state");
+
+  if (!code) {
+    return new Response("Authorization code not found", { status: 400 });
+  }
+
+  // The state value is validated client-side (in the inline script) because
+  // sessionStorage is only accessible in the browser. We still require it to
+  // be present on the server so a stateless request is always rejected.
+  if (!returnedState) {
+    return new Response("Missing state parameter", { status: 400 });
+  }
+
+  try {
+    const isDev = import.meta.env.MODE === 'development';
+    const isSecure = !isDev;
+
+    const clientId = import.meta.env.PUBLIC_TWITCH_CLIENT_ID;
+    const clientSecret = import.meta.env.TWITCH_CLIENT_SECRET;
+    const redirectUri = import.meta.env.PUBLIC_TWITCH_REDIRECT_URI;
+
+    const tokenData = await getTwitchAccessToken(
+      code,
+      clientId,
+      clientSecret,
+      redirectUri,
+    );
+
+    const user = await getTwitchUser(tokenData.accessToken, clientId);
+
+    // Store token in secure cookie
+    cookies.set("twitch_token", tokenData.accessToken, {
+      httpOnly: true,
+      secure: isSecure,
+      sameSite: "lax",
+      maxAge: tokenData.expiresIn || 3600,
+      path: "/",
+    });
+
+    if (tokenData.refreshToken) {
+      cookies.set("twitch_refresh_token", tokenData.refreshToken, {
+        httpOnly: true,
+        secure: isSecure,
+        sameSite: "lax",
+        maxAge: 60 * 60 * 24 * 30, // 30 days
+        path: "/",
+      });
+    }
+
+    // Safely serialize all values with JSON.stringify so that special characters
+    // (quotes, backslashes, newlines, etc.) in any user-controlled field can never
+    // break out of the JavaScript context and execute arbitrary code.
+    const sessionPayload = JSON.stringify({
+      platform: "twitch",
+      userId: user.userId,
+      displayName: user.displayName,
+      username: user.login,
+      profileImageUrl: user.profileImageUrl,
+      accessToken: tokenData.accessToken,
+      refreshToken: tokenData.refreshToken ?? "",
+      expiresAt: Date.now() + ((tokenData.expiresIn ?? 3600) * 1000),
+      timestamp: Date.now(),
+    });
+    // Pass the returned state value safely so the browser can verify it.
+    const returnedStateJson = JSON.stringify(returnedState);
+
+    // Return HTML that stores session in localStorage, posts message to opener, and redirects
+    return new Response(
+      `<!DOCTYPE html>
+<html>
+<head><title>Twitch Auth</title></head>
+<body>
+<script>
+  (function () {
+    // --- CSRF state validation ---
+    var expectedState = sessionStorage.getItem('twitch_oauth_state');
+    var returnedState = ${returnedStateJson};
+    sessionStorage.removeItem('twitch_oauth_state');
+
+    if (!expectedState || expectedState !== returnedState) {
+      document.body.innerText = 'Authentication failed: invalid state. Possible CSRF attack.';
+      return;
+    }
+    // --- End CSRF check ---
+
+    var session = ${sessionPayload};
+
+    try {
+      var sessions = JSON.parse(localStorage.getItem('mixchat_sessions') || '{}');
+      // Strip accessToken: it lives only in memory (React state) and is
+      // repopulated on reload via useTokenRefresh + the httpOnly cookie.
+      var persisted = Object.assign({}, session);
+      delete persisted.accessToken;
+      sessions.twitch = persisted;
+      localStorage.setItem('mixchat_sessions', JSON.stringify(sessions));
+    } catch (e) { /* storage unavailable */ }
+
+    try {
+      if (window.opener && window.opener.postMessage) {
+        window.opener.postMessage({ type: 'mixchat_session', session: session }, window.location.origin);
+      }
+    } catch (e) { /* cross-origin opener */ }
+
+    // If opened as a popup, close after notifying opener; otherwise redirect
+    if (window.opener) {
+      try { window.close(); } catch (e) {}
+      // fallback redirect in case close() is blocked
+      window.location.href = '/';
+    } else {
+      window.location.href = '/';
+    }
+  })();
+<\/script>
+</body>
+</html>`,
+      {
+        status: 200,
+        headers: { "Content-Type": "text/html" },
+      },
+    );
+  } catch (error) {
+    console.error("Twitch OAuth callback error:", error);
+    // Return a generic error page — never reflect raw error messages to the client.
+    return new Response(
+      `<!DOCTYPE html>
+<html>
+<head><title>Auth Error</title></head>
+<body>
+<h1>Authentication Failed</h1>
+<p>An error occurred during authentication. Please try again.</p>
+<a href="/">Back to home</a>
+</body>
+</html>`,
+      { status: 500, headers: { "Content-Type": "text/html" } },
+    );
+  }
+};

src/pages/auth/youtube/callback.ts

@@ -0,0 +1,169 @@
+import type { APIRoute } from "astro";
+import { getYoutubeAccessToken, getYoutubeUser } from "../../../lib/youtube";
+
+export const GET: APIRoute = async ({ url, cookies }) => {
+  const code = url.searchParams.get("code");
+  const returnedState = url.searchParams.get("state");
+
+  if (!code) {
+    return new Response("Authorization code not found", { status: 400 });
+  }
+
+  // Require the state parameter to be present on every callback request.
+  if (!returnedState) {
+    return new Response("Missing state parameter", { status: 400 });
+  }
+
+  try {
+    const isDev = import.meta.env.MODE === 'development';
+    const isSecure = !isDev;
+
+    const clientId = import.meta.env.PUBLIC_YOUTUBE_CLIENT_ID;
+    const clientSecret = import.meta.env.YOUTUBE_CLIENT_SECRET;
+    const redirectUri = import.meta.env.PUBLIC_YOUTUBE_REDIRECT_URI;
+
+    const tokenData = await getYoutubeAccessToken(
+      code,
+      clientId,
+      clientSecret,
+      redirectUri,
+    );
+
+    const user = await getYoutubeUser(tokenData.access_token);
+
+    // Store token in secure cookie. Align settings with the refresh endpoint
+    // so the server can read the refresh token later and refresh seamlessly.
+    cookies.set("youtube_token", tokenData.access_token, {
+      httpOnly: true,
+      secure: isSecure,
+      sameSite: "lax",
+      maxAge: tokenData.expires_in || 3600,
+      path: "/",
+    });
+
+    if (tokenData.refresh_token) {
+      cookies.set("youtube_refresh_token", tokenData.refresh_token, {
+        httpOnly: true,
+        secure: isSecure,
+        sameSite: "lax",
+        maxAge: 365 * 24 * 60 * 60, // 365 days
+        path: "/",
+      });
+    }
+
+    // Safely serialize all values with JSON.stringify so that special characters
+    // (quotes, backslashes, newlines, etc.) in any user-controlled field can never
+    // break out of the JavaScript context and execute arbitrary code.
+    const sessionPayload = JSON.stringify({
+      platform: "youtube",
+      userId: user.userId,
+      displayName: user.displayName,
+      profileImageUrl: user.profileImageUrl,
+      accessToken: tokenData.access_token,
+      // Only include refreshToken when Google actually returns one.
+      // An empty string would be falsy and cause useTokenRefresh to skip
+      // the httpOnly-cookie-based token refresh on page reload.
+      ...(tokenData.refresh_token ? { refreshToken: tokenData.refresh_token } : {}),
+      expiresAt: Date.now() + ((tokenData.expires_in ?? 3600) * 1000),
+      timestamp: Date.now(),
+    });
+    // Pass the returned state value safely so the browser can verify it.
+    const returnedStateJson = JSON.stringify(returnedState);
+
+    // Return HTML that posts the session to the opener (popup flow) and
+    // falls back to a localStorage + redirect approach when opened as a
+    // full-page redirect (e.g. popup blocked).
+    return new Response(
+      `<!DOCTYPE html>
+<html>
+<head><title>YouTube Auth</title></head>
+<body>
+<script>
+  (function () {
+    var returnedState = ${returnedStateJson};
+
+    // --- CSRF state validation ---
+    // In a popup flow the sessionStorage is scoped to the popup browsing context.
+    // After navigating through an external OAuth provider (Google) the popup's
+    // sessionStorage may no longer contain the key that was set before the navigation.
+    // Try to read the expected state from the opener's sessionStorage first
+    // (same-origin access is allowed), then fall back to the local copy.
+    var expectedState = null;
+    try {
+      if (window.opener && window.opener.sessionStorage) {
+        expectedState = window.opener.sessionStorage.getItem('youtube_oauth_state');
+        window.opener.sessionStorage.removeItem('youtube_oauth_state');
+      }
+    } catch (e) { /* opener may be cross-origin or inaccessible */ }
+
+    if (!expectedState) {
+      // Fallback: redirect flow — state lives in this window's sessionStorage.
+      expectedState = sessionStorage.getItem('youtube_oauth_state');
+      sessionStorage.removeItem('youtube_oauth_state');
+    }
+
+    if (!expectedState || expectedState !== returnedState) {
+      document.body.innerText = 'Authentication failed: invalid state. Possible CSRF attack.';
+      return;
+    }
+    // --- End CSRF check ---
+
+    var session = ${sessionPayload};
+
+    try {
+      var sessions = JSON.parse(localStorage.getItem('mixchat_sessions') || '{}');
+      // Strip accessToken: it lives only in memory (React state) and is
+      // repopulated on reload via useTokenRefresh + the httpOnly cookie.
+      var persisted = Object.assign({}, session);
+      delete persisted.accessToken;
+      sessions.youtube = persisted;
+      localStorage.setItem('mixchat_sessions', JSON.stringify(sessions));
+    } catch (e) { /* storage unavailable */ }
+
+    // Signal the parent window via postMessage (if opener reference is alive)
+    // and also via a dedicated localStorage key as a reliable fallback.
+    // Some browsers null out window.opener after cross-origin navigation.
+    try {
+      localStorage.setItem('mixchat_youtube_auth', JSON.stringify({ session: session, ts: Date.now() }));
+    } catch (e) { /* storage unavailable */ }
+
+    try {
+      if (window.opener && window.opener.postMessage) {
+        window.opener.postMessage({ type: 'mixchat_session', session: session }, window.location.origin);
+      }
+    } catch (e) { /* cross-origin opener */ }
+
+    // Close the popup if we were opened as one; otherwise do a full redirect.
+    if (window.opener) {
+      try { window.close(); } catch (e) {}
+      // fallback redirect in case close() is blocked
+      window.location.href = '/';
+    } else {
+      window.location.href = '/';
+    }
+  })();
+<\/script>
+</body>
+</html>`,
+      {
+        status: 200,
+        headers: { "Content-Type": "text/html" },
+      },
+    );
+  } catch (error) {
+    console.error("YouTube OAuth callback error:", error);
+    // Return a generic error page — never reflect raw error messages to the client.
+    return new Response(
+      `<!DOCTYPE html>
+<html>
+<head><title>Auth Error</title></head>
+<body>
+<h1>Authentication Failed</h1>
+<p>An error occurred during authentication. Please try again.</p>
+<a href="/">Back to home</a>
+</body>
+</html>`,
+      { status: 500, headers: { "Content-Type": "text/html" } },
+    );
+  }
+};

src/pages/index.astro

@@ -0,0 +1,156 @@
+---
+import AppContainer from "../components/AppContainer";
+import { DISPLAY_VERSION } from "../lib/version";
+import "../styles/global.css";
+import "../styles/AppContainer.css";
+import "../styles/ChatDisplay.css";
+import "../styles/LoginPanel.css";
+import "../styles/MessageInput.css";
+import "../styles/Notification.css";
+import "../styles/LoadingOverlay.css";
+import "../styles/EmoteMenu.css";
+
+const title = "Mixchat - Advanced Twitch Chat Client";
+const description =
+  "Enhanced Twitch chat client with support for emotes from 7TV, BTTV, and FFZ. Stream replies, badges, and third-party integrations.";
+
+const mainUrl = "https://mixchat.grepfs.xyz/";
+---
+
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="description" content={description} />
+    <meta name="theme-color" content="#0a0a0a" />
+    <meta name="mobile-web-app-capable" content="true" />
+    <title>{title}</title>
+
+    <link rel="icon" type="image/x-icon" href="/favicon.png" />
+    <link rel="apple-touch-icon" href="/favicon.png" />
+
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content={mainUrl} />
+    <meta property="og:title" content={title} />
+    <meta property="og:description" content={description} />
+    <meta property="og:site_name" content="Mixchat" />
+    <meta property="og:image" content={mainUrl + "favicon.png"} />
+
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content={title} />
+    <meta name="twitter:description" content={description} />
+    <meta name="twitter:image" content={mainUrl + "favicon.png"} />
+
+    <meta
+      name="keywords"
+      content="twitch chat, twitch emotes, 7tv, bttv, ffz, streaming client, chat client, youtube chat, youtube emotes, youtube chat client, mixchat"
+    />
+    <meta name="author" content="Mixchat" />
+    <link rel="canonical" href={mainUrl} />
+
+    <link rel="preconnect" href="https://www.twitch.tv" />
+    <link rel="preconnect" href="https://www.youtube.com" />
+
+    <script
+      type="application/ld+json"
+      set:html={JSON.stringify({
+        "@context": "https://schema.org",
+        "@type": "WebApplication",
+        name: "Mixchat",
+        description: description,
+        applicationCategory: "Utility",
+      })}
+    />
+  </head>
+  <style>
+    #app {
+      height: 100vh;
+      padding: 0;
+      padding-bottom: 50px;
+      background: var(--color-bg-primary);
+      overflow: hidden;
+    }
+
+    footer {
+      position: fixed;
+      bottom: 0;
+      left: 0;
+      right: 0;
+      border-top: 1px solid var(--color-border-medium);
+      padding: 12px 20px;
+      background: var(--color-bg-primary);
+      font-size: 12px;
+      color: var(--color-text-secondary);
+      text-align: center;
+      z-index: 100;
+      height: 50px;
+      box-sizing: border-box;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      gap: 12px;
+    }
+
+    footer img {
+      position: absolute;
+      left: 20px;
+      opacity: 0.7;
+    }
+
+    footer a {
+      color: var(--color-accent);
+      text-decoration: none;
+      margin: 0 12px;
+    }
+
+    footer a:hover {
+      text-decoration: underline;
+    }
+
+    @media (max-width: 768px) {
+      #app {
+        padding: 0;
+        padding-bottom: 60px;
+      }
+
+      footer {
+        height: 60px;
+        padding: 8px 12px;
+        font-size: 11px;
+      }
+
+      footer img {
+        display: none;
+      }
+
+      footer a {
+        margin: 0 6px;
+      }
+    }
+  </style>
+</html>
+<body>
+  <div id="app">
+    <AppContainer client:load />
+  </div>
+  <footer>
+    <a href="/privacy">Privacy</a>
+    <a href="/terms">Terms</a>
+
+    <span
+      >© 2026 Mixchat by <a
+        href="https://github.com/grepfs17/Mixchat"
+        target="_blank">grepfs17</a
+      > — Licensed under <a
+        href="https://opensource.org/licenses/MIT"
+        target="_blank">MIT</a
+      > — {DISPLAY_VERSION}</span
+    >
+    <img
+      src="/logo.png"
+      alt="Mixchat Logo"
+      style="width: auto; height: 30px;"
+    />
+  </footer>
+</body>

src/pages/privacy.astro

@@ -0,0 +1,164 @@
+---
+import "../styles/global.css";
+---
+
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="description" content="Mixchat Privacy Policy" />
+    <title>Privacy Policy - Mixchat</title>
+    <style>
+      body {
+        font-family:
+          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
+          Cantarell, sans-serif;
+        line-height: 1.6;
+        max-width: 900px;
+        margin: 0 auto;
+        padding: 20px;
+        background: #0a0a0a;
+        color: #e0e0e0;
+      }
+      h1 {
+        color: #fff;
+        margin-bottom: 10px;
+      }
+      h2 {
+        color: var(--color-accent);
+        margin-top: 30px;
+      }
+      .meta {
+        color: #999;
+        font-size: 14px;
+        margin-bottom: 30px;
+      }
+      a {
+        color: var(--color-accent);
+        text-decoration: none;
+      }
+      a:hover {
+        text-decoration: underline;
+      }
+      code {
+        background: #1a1a1a;
+        padding: 2px 6px;
+        border-radius: 3px;
+        font-family: "Courier New", monospace;
+      }
+    </style>
+  </head>
+  <body>
+    <div style="text-align: center; margin-bottom: 30px;">
+      <img
+        src="/logo.png"
+        alt="Mixchat Logo"
+        style="width: auto; height: 80px;"
+      />
+    </div>
+    <h1>Privacy Policy</h1>
+    <p class="meta">Last updated: March 29, 2026</p>
+
+    <h2>1. Overview</h2>
+    <p>
+      Mixchat is designed to function without a server-side database. No
+      messages, emails, or account credentials are stored on any server. Data
+      processing occurs locally in the visitor's browser. Once the user logs out
+      or clears their cache, session data is removed.
+    </p>
+
+    <h2>2. Data Collection</h2>
+
+    <h3>2.1 Logging In (Twitch & YouTube)</h3>
+    <p>
+      When connecting a Twitch or YouTube account, the browser gets "keys"
+      (OAuth tokens) from those services.
+    </p>
+    <ul>
+      <li>
+        <strong>Secure Storage:</strong> Key tokens are stored as <code
+          >httpOnly</code
+        > cookies. This helps block outside scripts from seeing them.
+      </li>
+      <li>
+        <strong>UI Session:</strong> A little bit of info (like your username and
+        profile picture) is saved in <code>localStorage</code> so the app remembers
+        who you are on refresh.
+      </li>
+    </ul>
+
+    <h3>2.2 Your Messages</h3>
+    <p>
+      Mixchat is a real-time client. Chat messages flow from Twitch or YouTube
+      directly to the screen. They are kept in the browser's memory during a
+      session and are not archived.
+    </p>
+
+    <h3>2.3 YouTube Integration</h3>
+    <p>
+      By linking a YouTube channel, Mixchat uses the official YouTube Data API.
+      It only requests public info to show live status and stream metadata
+      properly.
+    </p>
+
+    <h2>3. Third-Party Services</h2>
+    <p>
+      To make everything work smoothly, Mixchat talks to a few core services:
+    </p>
+    <ul>
+      <li><strong>Twitch & YouTube:</strong> For the chat and video feeds.</li>
+      <li>
+        <strong>Emote Providers (7TV, BTTV, FFZ):</strong> To render those custom
+        emotes everyone loves. These services might see which channel you're watching
+        so they can serve the right emote pack.
+      </li>
+    </ul>
+
+    <h2>4. Stateless and Database-Free</h2>
+    <p>
+      Mixchat's server/API is "stateless." This means it doesn't remember
+      sessions from one second to the next without the browser sending its
+      security key. There's no backend database where history or personal info
+      could be stored.
+    </p>
+
+    <h2>5. Data Retention and Deletion</h2>
+    <p>
+      Since no data is stored, "deleting an account" is straightforward.
+      Clicking
+      <strong>Logout</strong> wipes the cookies and session info from the browser.
+      Closing the tab clears the memory usage. For total assurance, clear the site
+      data in the browser settings.
+    </p>
+
+    <h2>6. Security</h2>
+    <p>
+      Login tokens are managed using secure HTTP-only cookies. It is recommended
+      to use strong passwords and two-factor authentication (2FA) on Twitch and
+      YouTube accounts.
+    </p>
+
+    <h2>7. Changes</h2>
+    <p>
+      Mixchat changes fast. The date at the top will be updated if there are
+      ever changes to how info is handled (like adding a new feature that needs
+      a different API).
+    </p>
+
+    <h2>8. Contact</h2>
+    <p>
+      If you have questions about any of this, open an issue on the
+      <a href="https://github.com/grepfs17/Mixchat" target="_blank"
+        >GitHub repository</a
+      >.
+    </p>
+
+    <hr style="margin-top: 50px; border: none; border-top: 1px solid #333;" />
+    <p
+      style="text-align: center; color: #666; font-size: 12px; margin-top: 20px;"
+    >
+      <a href="/">Back to Mixchat</a>
+    </p>
+  </body>
+</html>

src/pages/terms.astro

@@ -0,0 +1,125 @@
+---
+import "../styles/global.css";
+---
+
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="description" content="Mixchat Terms of Service" />
+    <title>Terms of Service - Mixchat</title>
+    <style>
+      body {
+        font-family:
+          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
+          Cantarell, sans-serif;
+        line-height: 1.6;
+        max-width: 900px;
+        margin: 0 auto;
+        padding: 20px;
+        background: #0a0a0a;
+        color: #e0e0e0;
+      }
+      h1 {
+        color: #fff;
+        margin-bottom: 10px;
+      }
+      h2 {
+        color: var(--color-accent);
+        margin-top: 30px;
+      }
+      .meta {
+        color: #999;
+        font-size: 14px;
+        margin-bottom: 30px;
+      }
+      a {
+        color: var(--color-accent);
+        text-decoration: none;
+      }
+      a:hover {
+        text-decoration: underline;
+      }
+      code {
+        background: #1a1a1a;
+        padding: 2px 6px;
+        border-radius: 3px;
+        font-family: "Courier New", monospace;
+      }
+    </style>
+  </head>
+  <body>
+    <div style="text-align: center; margin-bottom: 30px;">
+      <img
+        src="/logo.png"
+        alt="Mixchat Logo"
+        style="width: auto; height: 80px;"
+      />
+    </div>
+    <h1>Terms of Service</h1>
+    <p class="meta">Last updated: March 29, 2026</p>
+
+    <h2>1. Disclaimer</h2>
+    <p>Mixchat is an unofficial app with no connection to Twitch or YouTube.</p>
+    <p>
+      The app is provided "as is." If it breaks, or if platforms change their
+      APIs, Mixchat is not liable for service interruptions or account impacts.
+    </p>
+
+    <h2>2. User Guidelines</h2>
+    <p>By using Mixchat, you're promising to:</p>
+    <ul>
+      <li>
+        Follow the official <a
+          href="https://www.twitch.tv/legal/terms-of-service"
+          target="_blank">Twitch Terms</a
+        > and <a
+          href="https://www.twitch.tv/legal/community-guidelines"
+          target="_blank">Community Guidelines</a
+        >.
+      </li>
+      <li>Don't use the app to spam, harass, or crawl data unfairly.</li>
+      <li>Don't try to break the app or its API endpoints.</li>
+      <li>
+        If you link your YouTube, follow <a
+          href="https://www.youtube.com/t/terms"
+          target="_blank">Google's rules</a
+        > too.
+      </li>
+    </ul>
+
+    <h2>3. Limited Liability</h2>
+    <p>
+      If data, followers, or other account assets are lost due to bugs or
+      downtime, Mixchat is not responsible. The project is maintained by the
+      community on GitHub.
+    </p>
+
+    <h2>4. Open Source & License</h2>
+    <p>
+      Mixchat is open source and licensed under the MIT License. Feel free to
+      peek at the code or contribute. Just respect the trademarks of Twitch,
+      Google, 7TV, etc.
+    </p>
+
+    <h2>5. Termination</h2>
+    <p>
+      Mixchat reserves the right to block access or change the application at
+      any time if usage violates these terms.
+    </p>
+
+    <h2>6. Contact</h2>
+    <p>
+      Questions? Reach out on
+      <a href="https://github.com/grepfs17/Mixchat" target="_blank">GitHub</a>.
+    </p>
+
+    <hr style="margin-top: 50px; border: none; border-top: 1px solid #333;" />
+    <p
+      style="text-align: center; color: #666; font-size: 12px; margin-top: 20px;"
+    >
+      <a href="/">Back to Mixchat</a>
+    </p>
+  </body>
+</html>

src/styles/AppContainer.css

@@ -0,0 +1,66 @@
+@import './vars.css';
+
+/* AppContainer responsive layout */
+
+@media (max-width: 1365px) {
+  /* Main grid layout */
+  [style*="gridTemplateColumns"][style*="280px"] {
+    grid-template-columns: 1fr !important;
+  }
+
+  /* Sidebar becomes floating/overlay */
+  [data-sidebar-section] {
+    display: flex !important;
+    position: fixed !important;
+    left: 0 !important;
+    top: 0 !important;
+    bottom: 0 !important;
+    width: 280px !important;
+    z-index: 1000 !important;
+    box-shadow: var(--shadow-sm-dark) !important;
+  }
+
+  /* Show close button on mobile */
+  .sidebar-close-btn-container {
+    display: flex !important;
+  }
+
+  /* Video on top */
+  .app-grid {
+    display: grid !important;
+    grid-template-columns: 1fr !important;
+    grid-template-rows: 40vh 1fr !important;
+    gap: 0 !important;
+  }
+
+  /* When stream embed is hidden, adjust grid to full height for chat */
+  .app-grid:not(:has([data-stream-embed])) {
+    grid-template-rows: 1fr !important;
+  }
+
+  .app-grid > [data-stream-embed] {
+    grid-column: 1 !important;
+    grid-row: 1 !important;
+    min-height: 0 !important;
+    overflow: hidden !important;
+    height: auto !important;
+  }
+
+  /* Hide resizer */
+  .app-grid > div:nth-child(2) {
+    display: none !important;
+  }
+
+  /* Chat at bottom */
+  .app-grid > [data-chat-section] {
+    grid-column: 1 !important;
+    grid-row: 2 !important;
+    min-height: 0 !important;
+    overflow: auto !important;
+  }
+
+  [data-resizer] {
+    display: none !important;
+  }
+}
+

src/styles/ChatDisplay.css

@@ -0,0 +1,588 @@
+@import './vars.css';
+
+.chat-display {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  background: var(--color-bg-primary);
+  overflow: hidden;
+  box-shadow: var(--shadow-sm);
+  position: relative;
+}
+
+.chat-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 8px 12px;
+  background: var(--color-bg-primary);
+  color: var(--color-text-white);
+  border-bottom: 1px solid var(--color-border-dark);
+  gap: 8px;
+}
+
+.header-button {
+  background: var(--color-bg-tertiary);
+  border: 1px solid var(--color-border-light);
+  color: var(--color-text-primary);
+  padding: 6px 12px;
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  font-size: 12px;
+  font-weight: 500;
+  transition: all 0.2s ease;
+  margin-right: 8px;
+}
+
+.header-button:hover:not(:disabled) {
+  background: var(--color-bg-hover);
+  border-color: var(--color-border-lighter);
+  color: var(--color-text-white);
+}
+
+.header-button:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.chat-header-content {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex: 1;
+  min-width: 0;
+}
+
+.chat-header-content h2 {
+  flex-shrink: 0;
+}
+
+.chat-header-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.chat-header h2 {
+  margin: 0;
+  font-size: 0.95rem;
+  font-weight: 600;
+}
+
+.stream-title {
+  font-size: 0.75rem;
+  color: var(--color-text-secondary);
+  background: var(--color-bg-secondary);
+  padding: 2px 6px;
+  border-radius: var(--radius-sm);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  max-width: 200px;
+}
+
+.loading-indicator {
+  font-size: 1.5rem;
+  color: #4ade80;
+  animation: pulse 1s infinite;
+}
+
+@keyframes pulse {
+  0%, 100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: 0.5;
+  }
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.messages-container {
+  flex: 1;
+  overflow-y: auto;
+  overflow-x: hidden;
+  padding: 8px;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  font-size: var(--chat-font-size, 0.9rem);
+}
+
+/* Custom scrollbar styling */
+.messages-container::-webkit-scrollbar {
+  width: 8px;
+}
+
+.messages-container::-webkit-scrollbar-track {
+  background: var(--color-bg-primary);
+}
+
+.messages-container::-webkit-scrollbar-thumb {
+  background: var(--color-border-medium);
+  border-radius: var(--radius-md);
+}
+
+.messages-container::-webkit-scrollbar-thumb:hover {
+  background: var(--color-border-lighter);
+}
+
+.no-messages {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  color: var(--color-text-muted);
+  font-style: italic;
+}
+
+.message {
+  background: var(--color-bg-secondary);
+  padding: 6px 8px;
+  border-left: 3px solid var(--color-border-medium);
+  transition: background-color 0.2s ease, border-left-color 0.2s ease;
+  cursor: pointer;
+}
+
+.message:hover {
+  background: #252525;
+  border-left-color: #444444;
+}
+
+@keyframes slideIn {
+  from {
+    opacity: 0;
+    transform: translateY(10px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.message-single-line {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-size: var(--chat-font-size, 0.85rem);
+  flex-wrap: wrap;
+}
+
+
+
+
+.avatar {
+  width: 20px;
+  height: 20px;
+  object-fit: cover;
+  border-radius: var(--radius-full);
+  flex-shrink: 0;
+}
+
+.author {
+  font-weight: 600;
+  flex-shrink: 0;
+}
+
+.message-separator {
+  color: #94a3b8;
+  flex-shrink: 0;
+}
+
+.message-text {
+  color: #cbd5e1;
+  word-wrap: break-word;
+  overflow-wrap: break-word;
+  word-break: break-word;
+  line-height: 1.3;
+  font-size: var(--chat-font-size, 0.9rem);
+  flex: 1;
+}
+
+.message-actions {
+  display: flex;
+  gap: 4px;
+  margin-left: auto;
+  flex-shrink: 0;
+}
+
+.action-button {
+  background: transparent;
+  border: 1px solid #444444;
+  color: #cbd5e1;
+  cursor: pointer;
+  padding: 4px 8px;
+  font-size: 11px;
+  font-weight: 500;
+  opacity: 0.8;
+  transition: all 0.2s ease;
+  flex-shrink: 0;
+  border-radius: var(--radius-sm);
+}
+
+.action-button:hover {
+  opacity: 1;
+  background: #2a2a2a;
+  border-color: #555555;
+  color: #e2e8f0;
+}
+
+
+.timestamp {
+  font-size: 0.7rem;
+  color: #94a3b8;
+  flex-shrink: 0;
+}
+
+
+.go-to-bottom-button {
+  position: absolute;
+  bottom: 8px;
+  right: 16px;
+  background: var(--color-accent);
+  border: 1px solid var(--color-accent-hover);
+  color: #ffffff;
+  padding: 8px 12px;
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  font-size: 12px;
+  font-weight: 600;
+  transition: all 0.2s ease;
+  z-index: 100;
+  box-shadow: var(--shadow-accent-sm);
+}
+
+.go-to-bottom-button:hover {
+  background: var(--color-accent-hover);
+  box-shadow: var(--shadow-accent-md);
+  transform: translateY(-2px);
+}
+
+.go-to-bottom-button:active {
+  transform: translateY(0);
+}
+
+.chat-emote {
+  position: relative;
+}
+
+.chat-emote-tooltip {
+  position: fixed;
+  background: rgba(0, 0, 0, 0.95);
+  border: 1px solid #444;
+  border-radius: var(--radius-xl);
+  padding: 8px;
+  z-index: 10000;
+  pointer-events: none;
+  width: auto;
+  height: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  animation: tooltipFade 0.2s ease-out;
+}
+
+.chat-emote-tooltip img {
+  width: 100%;
+  height: auto;
+  display: block;
+  border-radius: var(--radius-md);
+  object-fit: contain;
+}
+
+.chat-emote-tooltip-name {
+  color: #e2e8f0;
+  font-size: 0.85rem;
+  text-align: center;
+  word-break: break-word;
+}
+
+@keyframes tooltipFade {
+  from {
+    opacity: 0;
+    transform: translateY(-5px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+@keyframes pulse {
+  0%, 100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: 0.7;
+  }
+}
+
+.sidebar-toggle-button {
+  padding: 4px 8px;
+  background-color: #1a1a1a;
+  color: #e2e8f0;
+  border: 1px solid #333;
+  border-radius: 3px;
+  cursor: pointer;
+  font-size: 11px;
+  font-weight: 600;
+  transition: background-color 0.2s;
+}
+
+.sidebar-toggle-button:hover {
+  background-color: #2a2a2a;
+}
+
+.show-stream-button {
+  padding: 4px 8px;
+  background-color: #6366f1;
+  color: #fff;
+  border: none;
+  border-radius: 3px;
+  cursor: pointer;
+  font-size: 11px;
+  font-weight: 600;
+  transition: background-color 0.2s;
+}
+
+.show-stream-button:hover {
+  background-color: #4f46e5;
+}
+
+.status-badge-live {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  background-color: #dc2626;
+  color: #ffffff;
+  padding: 2px 8px;
+  border-radius: 3px;
+  font-size: 0.75em;
+  font-weight: 600;
+  margin-right: 8px;
+}
+
+.status-badge-offline {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  background-color: #6b7280;
+  color: #ffffff;
+  padding: 2px 8px;
+  border-radius: 3px;
+  font-size: 0.75em;
+  font-weight: 600;
+  margin-right: 8px;
+}
+
+.status-dot {
+  display: inline-block;
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background-color: #ffffff;
+}
+
+.status-dot.pulse {
+  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
+}
+
+.channel-link {
+  color: #e2e8f0;
+  text-decoration: none;
+  transition: color 0.2s;
+}
+
+.channel-link:hover {
+  color: #9146ff;
+}
+
+.viewer-count-display {
+  margin-left: 12px;
+  font-size: 0.85em;
+  color: #94a3b8;
+  font-weight: 500;
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.uptime-display {
+  margin-left: 12px;
+  font-size: 0.85em;
+  color: #94a3b8;
+  font-weight: 500;
+}
+
+.message.preloaded {
+  opacity: 0.55;
+  background-color: #0a0a0a;
+}
+
+.message.bot {
+  opacity: 0.6;
+  background-color: #0f0f0f;
+}
+
+.message.redemption,
+.message.subscription,
+.message.resub,
+.message.subgift {
+  background-color: rgba(145, 71, 255, 0.4);
+  border-left: 3px solid #9147ff;
+}
+
+.message.cheer {
+  background-color: rgba(255, 183, 0, 0.4);
+  border-left: 3px solid #ffb700;
+}
+
+.message.mention {
+  background-color: rgba(99, 102, 241, 0.2);
+  border-left: 3px solid #6366f1;
+  padding-left: 8px;
+  margin-left: -8px;
+}
+
+.reply-info {
+  font-size: 0.75em;
+  color: #64748b;
+  margin-bottom: 2px;
+  font-style: italic;
+  opacity: 0.8;
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.reply-target-content {
+  color: #94a3b8;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  max-width: 450px;
+  display: inline-block;
+  vertical-align: bottom;
+}
+
+.reply-target-content .chat-emote {
+  height: 1.25em !important;
+  margin: 0 1px !important;
+}
+
+.author.self {
+  background-color: #3b82f6;
+  padding: 2px 6px;
+  border-radius: 3px;
+}
+
+.author-link {
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.author-link:hover {
+  text-decoration: underline;
+}
+
+/* Responsive design for lower resolutions */
+@media (max-width: 768px) {
+  .header-button {
+    font-size: 0;
+    gap: 0 !important;
+  }
+  
+  .header-button svg {
+    display: inline;
+  }
+  
+  .message-single-line {
+    gap: 2px;
+  }
+  
+  .message {
+    padding: 4px 6px;
+  }
+  
+  .avatar {
+    width: 16px;
+    height: 16px;
+  }
+  
+  .author {
+    font-size: 0.8rem;
+  }
+  
+  .timestamp {
+    font-size: 0.65rem;
+  }
+  
+  .message-text {
+    font-size: 0.85rem;
+    margin-top: 2px;
+    flex-basis: 100%;
+  }
+  
+  
+  .message-actions {
+    margin-left: auto;
+    margin-top: 4px;
+    flex-basis: 100%;
+  }
+}
+
+@media (max-width: 480px) {
+  .message-single-line {
+    gap: 1px;
+    font-size: 0.75rem;
+  }
+  
+  .message {
+    padding: 3px 4px;
+    gap: 2px;
+  }
+  
+  .avatar {
+    width: 14px;
+    height: 14px;
+  }
+  
+  .author {
+    font-size: 0.75rem;
+  }
+  
+  .timestamp {
+    font-size: 0.6rem;
+  }
+  
+  .message-text {
+    font-size: 0.8rem;
+    margin-top: 1px;
+    flex-basis: 100%;
+  }
+  
+  
+  .message-separator {
+    display: none;
+  }
+  
+  .message-actions {
+    gap: 2px;
+    margin-top: 3px;
+    flex-basis: 100%;
+    margin-left: auto;
+    justify-content: flex-end;
+  }
+  
+  .action-button {
+    padding: 2px 4px;
+    font-size: 10px;
+  }
+}

src/styles/EmoteMenu.css

@@ -0,0 +1,311 @@
+@import './vars.css';
+
+.emote-menu-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.7);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 2000;
+  animation: fadeIn 0.2s ease-in-out;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.emote-menu-modal {
+  background: var(--color-bg-primary);
+  border: 1px solid var(--color-accent);
+  border-radius: var(--radius-2xl);
+  width: 90%;
+  max-width: 600px;
+  max-height: 80vh;
+  display: flex;
+  flex-direction: column;
+  box-shadow: var(--shadow-accent-lg);
+  animation: slideIn 0.3s ease-out;
+}
+
+@keyframes slideIn {
+  from {
+    transform: translateY(-20px);
+    opacity: 0;
+  }
+  to {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.emote-menu-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 20px;
+  border-bottom: 1px solid var(--color-border-medium);
+}
+
+.emote-menu-header h2 {
+  margin: 0;
+  color: var(--color-text-primary);
+  font-size: 1.5rem;
+}
+
+.emote-menu-close {
+  background: transparent;
+  border: none;
+  color: var(--color-text-secondary);
+  font-size: 1.5rem;
+  cursor: pointer;
+  padding: 0;
+  width: 32px;
+  height: 32px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: color 0.2s;
+}
+
+.emote-menu-close:hover {
+  color: var(--color-text-primary);
+}
+
+.emote-menu-search {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 12px 20px;
+  border-bottom: 1px solid var(--color-border-medium);
+  background: var(--color-bg-primary);
+}
+
+.emote-search-input {
+  flex: 1;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: var(--radius-lg);
+  padding: 8px 12px;
+  color: var(--color-text-primary);
+  font-size: 0.95rem;
+  transition: border-color 0.2s;
+}
+
+.emote-search-input:focus {
+  outline: none;
+  border-color: var(--color-accent);
+  box-shadow: var(--shadow-accent-sm);
+}
+
+.emote-search-input::placeholder {
+  color: var(--color-text-muted);
+}
+
+.emote-menu-tabs {
+  display: flex;
+  gap: 0;
+  padding: 0 20px;
+  border-bottom: 2px solid var(--color-border-medium);
+  background: var(--color-bg-secondary);
+  height: 50px;
+  align-items: center;
+}
+
+.emote-tab {
+  flex: 1;
+  min-width: 80px;
+  padding: 12px 16px;
+  background: transparent;
+  border: none;
+  border-bottom: 3px solid transparent;
+  color: var(--color-text-secondary);
+  font-weight: 600;
+  font-size: 0.9rem;
+  cursor: pointer;
+  transition: all 0.2s;
+  white-space: nowrap;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.emote-tab:hover:not(.active) {
+  color: var(--color-text-primary);
+  opacity: 0.8;
+}
+
+.emote-tab.active {
+  border-bottom-color: var(--color-accent);
+  color: var(--color-accent);
+}
+
+.emote-menu-content {
+  flex: 1;
+  overflow-y: auto;
+  padding: 16px 20px;
+}
+
+.emote-source-section {
+  margin-bottom: 24px;
+}
+
+.emote-source-section:last-child {
+  margin-bottom: 0;
+}
+
+.emote-source-header {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 12px;
+  padding-bottom: 8px;
+  border-bottom: 2px solid var(--color-border-medium);
+}
+
+.emote-source-dot {
+  width: 12px;
+  height: 12px;
+  border-radius: var(--radius-full);
+  flex-shrink: 0;
+}
+
+.emote-source-header h3 {
+  margin: 0;
+  font-size: 1rem;
+  font-weight: 600;
+}
+
+.emote-source-count {
+  color: var(--color-text-muted);
+  font-size: 0.85rem;
+  margin-left: auto;
+}
+
+.emote-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
+  gap: 12px;
+}
+
+.emote-item {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 6px;
+  padding: 12px;
+  border: 1px solid var(--color-border-medium);
+  border-radius: var(--radius-xl);
+  cursor: pointer;
+  transition: all 0.2s;
+  background: var(--color-bg-secondary);
+  overflow: hidden;
+}
+
+.emote-item {
+  position: relative;
+}
+
+.emote-disable-btn {
+  position: absolute;
+  top: 6px;
+  right: 6px;
+  background: rgba(0,0,0,0.35);
+  border: 1px solid rgba(255,255,255,0.06);
+  color: var(--color-text-secondary);
+  padding: 4px 6px;
+  font-size: 0.7rem;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.emote-disable-btn:hover {
+  background: rgba(0,0,0,0.5);
+}
+
+.emote-disabled {
+  opacity: 0.45;
+  filter: grayscale(70%);
+}
+
+.emote-item:hover {
+  background: var(--color-bg-tertiary);
+  border-color: var(--color-accent);
+  transform: translateY(-2px);
+  box-shadow: var(--shadow-accent-md);
+}
+
+.emote-image {
+  width: 48px;
+  height: 48px;
+  object-fit: contain;
+  object-position: center;
+}
+
+.emote-name {
+  font-size: 0.75rem;
+  color: var(--color-text-secondary);
+  text-align: center;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  width: 100%;
+}
+
+.emote-no-results {
+  text-align: center;
+  padding: 40px 20px;
+  color: var(--color-text-muted);
+  font-size: 0.95rem;
+}
+
+.emote-no-results-section {
+  text-align: center;
+  padding: 20px;
+  color: var(--color-text-muted);
+  font-size: 0.85rem;
+}
+
+/* Scrollbar styling */
+.emote-menu-content::-webkit-scrollbar {
+  width: 8px;
+}
+
+.emote-menu-content::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.emote-menu-content::-webkit-scrollbar-thumb {
+  background: var(--color-border-medium);
+  border-radius: var(--radius-md);
+}
+
+.emote-menu-content::-webkit-scrollbar-thumb:hover {
+  background: var(--color-accent);
+}
+
+/* Mobile responsive */
+@media (max-width: 600px) {
+  .emote-menu-modal {
+    width: 95%;
+    max-height: 90vh;
+  }
+
+  .emote-grid {
+    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
+  }
+
+  .emote-image {
+    width: 40px;
+    height: 40px;
+  }
+}

src/styles/LiveNotification.css

@@ -0,0 +1,146 @@
+.live-notification {
+  position: fixed;
+  bottom: 20px;
+  right: 20px;
+  background: #0a0a0a;
+  border: 2px solid #6366f1;
+  border-radius: 12px;
+  padding: 20px;
+  max-width: 320px;
+  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.2);
+  z-index: 1000;
+  animation: slideIn 0.3s ease-out;
+}
+
+@keyframes slideIn {
+  from {
+    transform: translateX(400px);
+    opacity: 0;
+  }
+  to {
+    transform: translateX(0);
+    opacity: 1;
+  }
+}
+
+.live-notification-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 12px;
+  gap: 10px;
+}
+
+.live-notification-title {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  flex: 1;
+  min-width: 0;
+}
+
+.live-badge {
+  background: #6366f1;
+  color: white;
+  font-weight: bold;
+  font-size: 12px;
+  padding: 4px 8px;
+  border-radius: 4px;
+  white-space: nowrap;
+  animation: pulse 1s infinite;
+}
+
+@keyframes pulse {
+  0%, 100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: 0.7;
+  }
+}
+
+.streamer-name {
+  color: #e0e0e0;
+  font-weight: 600;
+  font-size: 16px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.live-notification-close {
+  background: none;
+  border: none;
+  color: #999;
+  cursor: pointer;
+  font-size: 18px;
+  padding: 4px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: color 0.2s;
+  flex-shrink: 0;
+}
+
+.live-notification-close:hover {
+  color: #e0e0e0;
+}
+
+.streamer-avatar {
+  width: 100%;
+  max-width: 300px;
+  height: auto;
+  border-radius: 8px;
+  margin-bottom: 12px;
+  display: block;
+}
+
+.stream-title {
+  color: #b0b0b0;
+  font-size: 14px;
+  margin-bottom: 8px;
+  line-height: 1.4;
+  overflow: hidden;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+.viewer-count {
+  color: #a0a0a0;
+  font-size: 13px;
+  margin-bottom: 12px;
+}
+
+.view-now-button {
+  width: 100%;
+  background: #6366f1;
+  color: white;
+  border: none;
+  padding: 12px;
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 14px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.view-now-button:hover {
+  background: #4f46e5;
+  transform: translateY(-2px);
+  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
+}
+
+.view-now-button:active {
+  transform: translateY(0);
+}
+
+@media (max-width: 480px) {
+  .live-notification {
+    bottom: 10px;
+    right: 10px;
+    left: 10px;
+    max-width: none;
+  }
+}

src/styles/LoadingOverlay.css

@@ -0,0 +1,39 @@
+@import './vars.css';
+
+.loading-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background-color: rgba(10, 10, 10, 0.85);
+  backdrop-filter: blur(4px);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+  color: white;
+}
+
+.loading-spinner {
+  width: 50px;
+  height: 50px;
+  border: 4px solid var(--color-border-medium);
+  border-top-color: var(--color-accent);
+  border-radius: var(--radius-full);
+  animation: spin 1s linear infinite;
+  margin-bottom: 20px;
+}
+
+.loading-text {
+  font-size: 1.2rem;
+  color: var(--color-text-primary);
+  font-weight: 500;
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}

src/styles/LoginPanel.css

@@ -0,0 +1,387 @@
+@import './vars.css';
+
+.login-panel {
+  display: flex;
+  flex-direction: column;
+  gap: 0;
+  padding: 0;
+  background: var(--color-bg-secondary);
+  box-shadow: none;
+  height: 100%;
+  overflow: hidden;
+}
+
+.login-panel-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  padding: 12px;
+  border-bottom: 1px solid var(--color-border-medium);
+}
+
+.login-panel h3 {
+  margin: 0;
+  font-size: 0.75rem;
+  color: var(--color-text-secondary);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  font-weight: 600;
+  flex-shrink: 0;
+}
+
+.icon-button {
+  background: none;
+  border: 1px solid #333333;
+  color: #6366f1;
+  cursor: pointer;
+  padding: 6px 10px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 16px;
+  transition: all 0.2s;
+  border-radius: 4px;
+  flex-shrink: 0;
+}
+
+.icon-button:hover {
+  color: #4f46e5;
+  border-color: #6366f1;
+}
+
+.icon-button.youtube-icon-btn {
+  color: #FF0000;
+}
+
+.icon-button.youtube-icon-btn:hover {
+  color: #cc0000;
+  border-color: #FF0000;
+}
+
+.icon-button.small {
+  font-size: 14px;
+}
+
+.platform-login {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  padding: 12px;
+  border: none;
+  border-bottom: 1px solid var(--color-border-medium);
+  background: var(--color-bg-primary);
+  margin: 0;
+  flex: 1;
+  min-height: 0;
+}
+
+.platform-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.platform-name {
+  font-weight: 600;
+  font-size: 1rem;
+}
+
+.platform-login.twitch .platform-name {
+  color: var(--color-twitch);
+}
+
+.platform-login.youtube .platform-name {
+  color: var(--color-youtube);
+}
+
+.connected-info {
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 12px;
+  flex: 1;
+  min-height: 0;
+  overflow: visible;
+}
+
+.user-profile-container {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.user-profile-link {
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex: 1;
+  padding: 4px;
+  border-radius: 6px;
+  transition: background-color 0.2s;
+  min-width: 0;
+}
+
+.user-profile-link:hover {
+  background-color: rgba(255, 255, 255, 0.05);
+}
+
+.profile-image {
+  width: 48px;
+  height: 48px;
+  border-radius: var(--radius-full);
+  object-fit: cover;
+  flex-shrink: 0;
+  border: 2px solid var(--color-border-medium);
+  transition: transform 0.2s;
+}
+
+.profile-image:hover {
+  transform: scale(1.05);
+}
+
+.user-details {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  min-width: 0;
+  flex: 1;
+  overflow: hidden;
+}
+
+.user-name {
+  margin: 0;
+  font-size: 0.8rem;
+  color: #e2e8f0;
+  font-weight: 600;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.user-actions {
+  display: flex;
+  gap: 4px;
+}
+
+.channels-section {
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid #333;
+  display: flex;
+  flex-direction: column;
+  flex: 1;
+  min-height: 0;
+}
+
+.section-label {
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: #94a3b8;
+  margin-bottom: 8px;
+  display: block;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  flex-shrink: 0;
+}
+
+.channel-search-input {
+  width: 100%;
+  padding: 8px;
+  margin-bottom: 8px;
+  border: 1px solid #333333;
+  border-radius: 4px;
+  font-size: 0.9rem;
+  background-color: #0a0a0a;
+  color: #e2e8f0;
+  box-sizing: border-box;
+  flex-shrink: 0;
+}
+
+.channel-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  max-height: calc(100vh - 475px);
+  overflow-y: auto;
+  overflow-x: hidden;
+  padding-right: 4px;
+}
+
+.channel-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  cursor: pointer;
+  padding: 8px 10px;
+  border-radius: 6px;
+  border: 2px solid transparent;
+  transition: all 0.2s ease;
+}
+
+.channel-item.selected {
+  border-color: var(--color-accent);
+  background-color: rgba(158, 64, 115, 0.1);
+}
+
+.channel-item-image {
+  width: 32px;
+  height: 32px;
+  border-radius: 50%;
+  object-fit: cover;
+  border: 1px solid #333333;
+  flex-shrink: 0;
+}
+
+.channel-item-name {
+  font-size: 0.9rem;
+  color: #e2e8f0;
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.viewer-count {
+  font-size: 0.8rem;
+  color: #94a3b8;
+  flex-shrink: 0;
+  margin-left: 4px;
+  display: flex;
+  align-items: center;
+  gap: 2px;
+}
+
+.favorite-button {
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 0 4px;
+  flex-shrink: 0;
+  color: #666666;
+  transition: color 0.2s ease;
+  line-height: 1;
+  display: flex;
+  align-items: center;
+}
+
+.favorite-button.active {
+  color: #fbbf24;
+}
+
+.manual-join-section {
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid #333;
+  flex-shrink: 0;
+}
+
+.join-form {
+  display: flex;
+  gap: 4px;
+}
+
+.join-input {
+  flex: 1;
+  padding: 8px;
+  border: 1px solid #333333;
+  font-size: 0.9rem;
+  background-color: #0a0a0a;
+  color: #e2e8f0;
+  min-width: 0;
+}
+
+.login-btn,
+.logout-btn {
+  padding: 8px 12px;
+  border: none;
+  font-weight: 600;
+  font-size: 0.85rem;
+  cursor: pointer;
+  transition: transform 0.2s, opacity 0.2s;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+
+.login-btn:hover {
+  transform: translateY(-2px);
+  opacity: 0.9;
+}
+
+.login-btn:active {
+  transform: translateY(0);
+}
+
+.login-btn.twitch-btn {
+  background-color: #9146ff;
+  color: white;
+}
+
+.login-btn.youtube-btn {
+  background-color: #ff0000;
+  color: white;
+}
+
+.logout-btn {
+  background-color: #333333;
+  color: #e2e8f0;
+  flex-shrink: 0;
+}
+
+.logout-btn:hover {
+  background-color: #555555;
+}
+
+.logout-btn.small {
+  font-size: 12px;
+  padding: 4px 8px;
+}
+
+.youtube-section {
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid #333;
+}
+
+.youtube-info-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+}
+
+.youtube-user-info {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+
+.youtube-user-name {
+  font-size: 13px;
+  color: #e2e8f0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+/* Channel list scrollbar styling */
+.channel-list::-webkit-scrollbar {
+  width: 8px;
+}
+
+.channel-list::-webkit-scrollbar-track {
+  background: #0a0a0a;
+}
+
+.channel-list::-webkit-scrollbar-thumb {
+  background: #333333;
+  border-radius: var(--radius-md);
+}
+
+.channel-list::-webkit-scrollbar-thumb:hover {
+  background: #555555;
+}

src/styles/MessageInput.css

@@ -0,0 +1,289 @@
+@import './vars.css';
+
+.message-input {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  padding: 10px;
+  background: var(--color-bg-primary);
+  border-top: 1px solid var(--color-border-dark);
+}
+
+.reply-indicator {
+  order: -1;
+  margin-bottom: 8px;
+}
+
+.reply-indicator > div:first-child {
+  order: 1;
+  margin-right: auto;
+}
+
+.platform-selector {
+  display: flex;
+  gap: 12px;
+  flex-wrap: wrap;
+}
+
+.platform-checkbox {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  cursor: pointer;
+  user-select: none;
+}
+
+.platform-checkbox input {
+  cursor: pointer;
+  width: 18px;
+  height: 18px;
+}
+
+.platform-checkbox input:disabled {
+  cursor: not-allowed;
+  opacity: 0.5;
+}
+
+.platform-label {
+  font-size: 0.95rem;
+  font-weight: 500;
+  padding: 4px 8px;
+  transition: background-color 0.2s;
+}
+
+.platform-label.twitch {
+  color: var(--color-twitch);
+}
+
+.platform-label.twitch:not(.disabled):hover {
+  background-color: rgba(145, 70, 255, 0.1);
+}
+
+.platform-label.youtube {
+  color: var(--color-youtube);
+}
+
+.platform-label.youtube:not(.disabled):hover {
+  background-color: rgba(255, 0, 0, 0.1);
+}
+
+.platform-label.disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.input-group {
+  display: flex;
+  gap: 8px;
+  align-items: stretch;
+  height: 36px;
+}
+
+.message-textarea {
+  flex: 1;
+  padding: 8px 10px;
+  border: 1px solid var(--color-border-medium);
+  font-family: inherit;
+  font-size: 0.95rem;
+  resize: none;
+  height: 100%;
+  box-sizing: border-box;
+  transition: border-color 0.2s;
+  background: var(--color-bg-secondary);
+  color: var(--color-text-primary);
+  overflow: hidden;
+}
+
+.message-textarea:focus {
+  outline: none;
+  border-color: var(--color-border-lighter);
+  box-shadow: 0 0 0 3px rgba(85, 85, 85, 0.2);
+}
+
+.message-textarea.twitch {
+  border-color: #9146ff;
+}
+
+.message-textarea.twitch:focus {
+  border-color: #a970ff;
+  box-shadow: 0 0 0 3px rgba(145, 70, 255, 0.2);
+}
+
+.message-textarea.youtube {
+  border-color: #ff0000;
+}
+
+.message-textarea.youtube:focus {
+  border-color: #ff3333;
+  box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.2);
+}
+
+.message-textarea:disabled {
+  background-color: #1a1a1a;
+  cursor: not-allowed;
+  opacity: 0.5;
+}
+
+.send-button {
+  padding: 8px 12px;
+  background: #333333;
+  color: white;
+  border: none;
+  font-weight: 600;
+  cursor: pointer;
+  transition: transform 0.2s, box-shadow 0.2s;
+  height: 100%;
+  min-width: 36px;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.send-button:hover:not(:disabled) {
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(85, 85, 85, 0.4);
+}
+
+.send-button:active:not(:disabled) {
+  transform: translateY(0);
+}
+
+.send-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.emote-picker-button {
+  padding: 0;
+  width: 36px;
+  min-width: 36px;
+  height: 100%;
+  background: #1a1a1a;
+  color: #cbd5e1;
+  border: 1px solid #333333;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+  flex-shrink: 0;
+}
+
+.emote-picker-button:hover:not(:disabled) {
+  background: #262626;
+  border-color: #475569;
+  color: #e2e8f0;
+  transform: scale(1.05);
+}
+
+.emote-picker-button:active:not(:disabled) {
+  transform: scale(0.95);
+}
+
+.emote-picker-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.warning {
+  padding: 8px 12px;
+  background-color: #3d2817;
+  border-left: 4px solid #f59e0b;
+  color: #fde047;
+  font-size: 0.9rem;
+}
+/* Responsive design for lower resolutions */
+@media (max-width: 768px) {
+  .message-input {
+    gap: 8px;
+    padding: 12px;
+  }
+  
+  .platform-selector {
+    gap: 8px;
+  }
+  
+  .platform-checkbox input {
+    width: 16px;
+    height: 16px;
+  }
+  
+  .platform-label {
+    font-size: 0.9rem;
+    padding: 3px 6px;
+  }
+  
+  .input-group {
+    height: 40px;
+    gap: 6px;
+  }
+  
+  .message-textarea {
+    padding: 8px;
+    font-size: 0.9rem;
+  }
+  
+  .send-button {
+    padding: 8px 16px;
+    font-size: 0.9rem;
+    min-width: 80px;
+  }
+}
+
+@media (max-width: 480px) {
+  .message-input {
+    gap: 6px;
+    padding: 8px;
+  }
+  
+  .platform-selector {
+    gap: 6px;
+    flex-direction: column;
+  }
+  
+  .platform-checkbox {
+    gap: 4px;
+  }
+  
+  .platform-checkbox input {
+    width: 14px;
+    height: 14px;
+  }
+  
+  .platform-label {
+    font-size: 0.85rem;
+    padding: 2px 4px;
+  }
+  
+  .input-group {
+    height: 36px;
+    gap: 4px;
+    flex-direction: row;
+  }
+  
+  .message-textarea {
+    padding: 6px;
+    font-size: 0.85rem;
+    height: 100%;
+    min-height: auto;
+  }
+  
+  .emote-picker-button {
+    width: 36px;
+    min-width: 36px;
+    height: 100%;
+  }
+  
+  .send-button {
+    padding: 6px 12px;
+    font-size: 0.85rem;
+    min-width: 60px;
+    height: 100%;
+  }
+  
+  .warning {
+    padding: 6px 8px;
+    font-size: 0.8rem;
+  }
+}

src/styles/Notification.css

@@ -0,0 +1,55 @@
+@import './vars.css';
+
+.notification {
+  position: fixed;
+  bottom: 20px;
+  right: 20px;
+  padding: 12px 20px;
+  border-radius: var(--radius-xl);
+  font-size: 14px;
+  box-shadow: var(--shadow-md);
+  animation: slideIn 0.3s ease-out, slideOut 0.3s ease-out 2.7s forwards;
+  max-width: 300px;
+  word-wrap: break-word;
+  z-index: 1000;
+}
+
+.notification-success {
+  background-color: var(--color-notification-success);
+  color: white;
+  border: 1px solid var(--color-notification-success-border);
+}
+
+.notification-error {
+  background-color: var(--color-notification-error);
+  color: white;
+  border: 1px solid var(--color-notification-error-border);
+}
+
+.notification-info {
+  background-color: var(--color-notification-info);
+  color: white;
+  border: 1px solid var(--color-notification-info-border);
+}
+
+@keyframes slideIn {
+  from {
+    transform: translateX(400px);
+    opacity: 0;
+  }
+  to {
+    transform: translateX(0);
+    opacity: 1;
+  }
+}
+
+@keyframes slideOut {
+  from {
+    transform: translateX(0);
+    opacity: 1;
+  }
+  to {
+    transform: translateX(400px);
+    opacity: 0;
+  }
+}

src/styles/UnifiedChat.css

@@ -0,0 +1,99 @@
+@import './vars.css';
+
+.unified-chat-wrapper {
+    position: relative;
+    flex: 1;
+    min-height: 0;
+    display: flex;
+    flex-direction: column;
+}
+
+.unified-messages-container {
+    flex: 1;
+    overflow-y: auto;
+    padding: 0 0 4px 0;
+}
+
+.platform-tag {
+    display: inline-flex;
+    align-items: center;
+    margin-right: 3px;
+    flex-shrink: 0;
+}
+
+.platform-tag.twitch {
+    color: #9147ff;
+}
+
+.platform-tag.youtube {
+    color: #FF0000;
+}
+
+/* Reusing some classes from ChatDisplay via global scope or if added here */
+.twitch-event-icon {
+    margin-right: 4px;
+    display: inline-flex;
+    align-items: center;
+}
+
+.author.twitch-author:hover {
+    text-decoration: underline;
+}
+
+
+/* Ensure UnifiedChat specific overrides if needed */
+
+/* Super Chat Styles - Reused from YouTubeChat.css */
+.yt-superchat {
+  margin: 4px 8px;
+  border-radius: 4px;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
+}
+
+.yt-superchat-header {
+  padding: 8px 12px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  font-weight: 600;
+}
+
+.yt-superchat-header .avatar {
+  width: 40px !important;
+  height: 40px !important;
+  border-radius: 50%;
+}
+
+.yt-superchat-info {
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.yt-superchat-author {
+  color: rgba(255, 255, 255, 0.9);
+  font-size: 13px;
+}
+
+.yt-superchat-amount {
+  color: #fff;
+  font-size: 14px;
+}
+
+.yt-superchat-body {
+  padding: 8px 12px;
+  background-color: rgba(0, 0, 0, 0.1);
+  color: #fff;
+  word-break: break-word;
+  line-height: 1.4;
+}
+
+.yt-superchat-sticker {
+  width: 72px;
+  height: 72px;
+  margin-top: 4px;
+  object-fit: contain;
+}

src/styles/WatchlistManager.css

@@ -0,0 +1,346 @@
+.watchlist-manager-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.7);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 999;
+  animation: fadeIn 0.2s ease-out;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.watchlist-manager {
+  background: var(--color-bg-primary);
+  border: 1px solid var(--color-accent);
+  border-radius: 12px;
+  padding: 28px;
+  max-width: 500px;
+  width: 90%;
+  max-height: 80vh;
+  display: flex;
+  flex-direction: column;
+  box-shadow: var(--shadow-accent-lg);
+  color: var(--color-text-primary);
+}
+
+.watchlist-manager h2 {
+  margin: 0 0 8px 0;
+  font-size: 20px;
+  font-weight: 600;
+  color: var(--color-text-white);
+}
+
+.subtitle {
+  margin: 0 0 20px 0;
+  font-size: 13px;
+  color: var(--color-text-secondary);
+}
+
+.watchlist-add-section {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 20px;
+  position: relative;
+}
+
+.channel-search {
+  flex: 1;
+  padding: 10px 12px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  color: var(--color-text-primary);
+  font-size: 13px;
+  cursor: text;
+  transition: border-color 0.2s;
+}
+
+.channel-search:hover,
+.channel-search:focus {
+  border-color: var(--color-accent);
+  outline: none;
+}
+
+.channel-list-dropdown {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  right: 72px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-top: none;
+  border-radius: 0 0 6px 6px;
+  max-height: 300px;
+  overflow-y: auto;
+  z-index: 10;
+  display: none;
+}
+
+.channel-search:focus ~ .channel-list-dropdown {
+  display: block;
+}
+
+.channel-list-dropdown:hover {
+  display: block;
+}
+
+.channel-search:focus ~ .channel-list-dropdown:hover {
+  display: block;
+}
+
+.no-channels-message {
+  padding: 16px;
+  text-align: center;
+  color: var(--color-text-muted);
+  font-size: 13px;
+}
+
+.channel-list-item {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 12px;
+  background: none;
+  border: none;
+  border-bottom: 1px solid var(--color-border-dark);
+  color: var(--color-text-primary);
+  cursor: pointer;
+  transition: background 0.2s;
+  text-align: left;
+  font-size: 13px;
+}
+
+.channel-list-item:last-child {
+  border-bottom: none;
+}
+
+.channel-list-item:hover {
+  background: var(--color-bg-tertiary);
+}
+
+.channel-thumb {
+  width: 32px;
+  height: 32px;
+  border-radius: 4px;
+  object-fit: cover;
+  flex-shrink: 0;
+}
+
+.channel-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.channel-display-name {
+  font-weight: 600;
+  color: var(--color-text-primary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.channel-username {
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.selected-channel-display {
+  padding: 10px 12px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  color: var(--color-text-primary);
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  flex: 1;
+}
+
+.add-button {
+  padding: 10px 16px;
+  background: var(--color-accent);
+  color: white;
+  border: none;
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 13px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  transition: all 0.2s;
+  white-space: nowrap;
+}
+
+.add-button:hover:not(:disabled) {
+  background: var(--color-accent-hover);
+  transform: translateY(-1px);
+}
+
+.add-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.watchlist-items {
+  flex: 1;
+  overflow-y: auto;
+  margin-bottom: 16px;
+  padding-right: 8px;
+}
+
+.watchlist-items::-webkit-scrollbar {
+  width: 6px;
+}
+
+.watchlist-items::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.watchlist-items::-webkit-scrollbar-thumb {
+  background: var(--color-border-medium);
+  border-radius: 3px;
+}
+
+.watchlist-items::-webkit-scrollbar-thumb:hover {
+  background: var(--color-accent);
+}
+
+.empty-message {
+  text-align: center;
+  color: var(--color-text-muted);
+  font-size: 13px;
+  padding: 20px;
+  margin: 0;
+}
+
+.watchlist-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 12px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  margin-bottom: 8px;
+  transition: all 0.2s;
+}
+
+.watchlist-item:hover {
+  background: var(--color-bg-tertiary);
+  border-color: var(--color-accent);
+}
+
+.item-info {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex: 1;
+  min-width: 0;
+}
+
+.item-avatar {
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  object-fit: cover;
+  flex-shrink: 0;
+}
+
+.item-details {
+  min-width: 0;
+  flex: 1;
+}
+
+.item-name {
+  font-weight: 600;
+  font-size: 14px;
+  color: var(--color-text-primary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.item-username {
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.remove-button {
+  background: none;
+  border: none;
+  color: var(--color-accent);
+  cursor: pointer;
+  padding: 6px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+  flex-shrink: 0;
+  font-size: 14px;
+}
+
+.remove-button:hover {
+  color: var(--color-accent-hover);
+  transform: scale(1.1);
+}
+
+.watchlist-footer {
+  border-top: 1px solid var(--color-border-medium);
+  padding-top: 16px;
+}
+
+.info-text {
+  display: flex;
+  align-items: center;
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  margin: 0 0 12px 0;
+}
+
+.close-button {
+  width: 100%;
+  padding: 10px;
+  background: var(--color-bg-secondary);
+  color: var(--color-text-primary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 13px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.close-button:hover {
+  background: var(--color-bg-tertiary);
+  border-color: var(--color-accent);
+}
+
+@media (max-width: 480px) {
+  .watchlist-manager {
+    padding: 20px;
+    max-width: 100%;
+    max-height: 90vh;
+  }
+
+  .watchlist-manager h2 {
+    font-size: 18px;
+  }
+}

src/styles/YouTubeChat.css

@@ -0,0 +1,233 @@
+.yt-chat-outer {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  background-color: var(--color-bg-primary);
+  color: var(--color-text-white);
+}
+
+.yt-chat-container {
+  font-size: var(--chat-font-size, 13px);
+  color: var(--color-text-white);
+  background: var(--color-bg-primary);
+  height: 100%;
+  overflow-y: auto;
+  padding: 10px;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+/* Custom scrollbar styling - matching Twitch chat */
+.yt-chat-container::-webkit-scrollbar {
+  width: 8px;
+}
+
+.yt-chat-container::-webkit-scrollbar-track {
+  background: var(--color-bg-primary);
+}
+
+.yt-chat-container::-webkit-scrollbar-thumb {
+  background: var(--color-border-medium);
+  border-radius: var(--radius-md);
+}
+
+.yt-chat-container::-webkit-scrollbar-thumb:hover {
+  background: var(--color-border-lighter);
+}
+
+.yt-chat-status {
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background-color: #0a0a0a;
+  color: #999;
+}
+
+.yt-chat-error {
+  flex-direction: column;
+  padding: 20px;
+  text-align: center;
+  gap: 10px;
+}
+
+.yt-chat-error-sub {
+  font-size: 12px;
+  color: #666;
+}
+
+.yt-chat-placeholder {
+  color: #666;
+  text-align: center;
+  padding: 20px;
+}
+
+.yt-message-badges {
+  display: flex;
+  align-items: center;
+  margin-right: 4px;
+  gap: 2px;
+}
+
+.yt-badge {
+  width: 18px;
+  height: 18px;
+  vertical-align: middle;
+}
+
+.yt-emoji {
+  vertical-align: middle;
+  margin: 0 1px;
+  object-fit: contain;
+}
+
+.yt-emoji.custom {
+  width: 28px;
+  height: 28px;
+}
+
+.yt-emoji.standard {
+  width: 18px;
+  height: 18px;
+}
+
+.yt-message-input-wrapper {
+  padding: 8px 10px;
+  gap: 8px;
+  display: flex;
+}
+
+.yt-input-group {
+  position: relative;
+  flex: 1;
+}
+
+.emote-autocomplete-menu {
+  position: absolute;
+  bottom: 100%;
+  left: 0;
+  right: 0;
+  max-height: 260px;
+  overflow-y: auto;
+  background: #1e293b;
+  border: 1px solid #475569;
+  border-radius: 8px;
+  margin-bottom: 6px;
+  z-index: 1000;
+  box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
+}
+
+.emote-autocomplete-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 7px 12px;
+  cursor: pointer;
+  transition: background 0.12s;
+}
+
+.emote-autocomplete-item.selected {
+  background: #334155;
+}
+
+.emote-autocomplete-item img {
+  object-fit: contain;
+  flex-shrink: 0;
+}
+
+.emote-autocomplete-info {
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+  min-width: 0;
+}
+
+.emote-autocomplete-name {
+  color: #e2e8f0;
+  font-weight: 500;
+  font-size: 13px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.emote-autocomplete-type {
+  color: #94a3b8;
+  font-size: 11px;
+}
+
+.yt-status-refreshing {
+  padding: 6px 12px;
+  background-color: #0f0f0f;
+  border-top: 1px solid #333;
+  font-size: 11px;
+  color: #888;
+  text-align: center;
+}
+
+
+.yt-status-login-required {
+  padding: 6px 12px;
+  background-color: #0f0f0f;
+  border-top: 1px solid #333;
+  font-size: 11px;
+  color: #666;
+  text-align: center;
+}
+
+/* Super Chat Styles */
+.yt-superchat {
+  margin: 4px 0;
+  border-radius: 4px;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
+}
+
+.yt-superchat-header {
+  padding: 8px 12px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  font-weight: 600;
+}
+
+.yt-superchat-header .avatar {
+  width: 40px !important;
+  height: 40px !important;
+  border-radius: 50%;
+}
+
+.yt-superchat-info {
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.yt-superchat-author {
+  color: rgba(255, 255, 255, 0.9);
+  font-size: 13px;
+}
+
+.yt-superchat-amount {
+  color: #fff;
+  font-size: 14px;
+}
+
+.yt-superchat-body {
+  padding: 8px 12px;
+  background-color: rgba(0, 0, 0, 0.1);
+  color: #fff;
+  word-break: break-word;
+  line-height: 1.4;
+}
+
+.yt-superchat-sticker {
+  width: 72px;
+  height: 72px;
+  margin-top: 4px;
+  object-fit: contain;
+}
+

src/styles/YouTubeLinker.css

@@ -0,0 +1,363 @@
+/* YouTubeLinker modal – mirrors WatchlistManager styles */
+
+.ytlinker-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.7);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 999;
+  animation: fadeIn 0.2s ease-out;
+}
+
+.ytlinker-manager {
+  background: var(--color-bg-primary);
+  border: 1px solid var(--color-accent);
+  border-radius: 12px;
+  padding: 28px;
+  max-width: 540px;
+  width: 90%;
+  max-height: 80vh;
+  display: flex;
+  flex-direction: column;
+  box-shadow: var(--shadow-accent-lg);
+  color: var(--color-text-primary);
+}
+
+.ytlinker-manager h2 {
+  margin: 0 0 8px 0;
+  font-size: 20px;
+  font-weight: 600;
+  color: var(--color-text-white);
+  display: flex;
+  align-items: center;
+}
+
+.ytlinker-subtitle {
+  margin: 0 0 20px 0;
+  font-size: 13px;
+  color: var(--color-text-secondary);
+}
+
+/* Add section */
+.ytlinker-add-section {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  margin-bottom: 20px;
+}
+
+.ytlinker-inputs {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.ytlinker-channel-select,
+.ytlinker-url-input {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.ytlinker-label {
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--color-text-secondary);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.ytlinker-search {
+  width: 100%;
+  padding: 10px 12px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  color: var(--color-text-primary);
+  font-size: 13px;
+  cursor: text;
+  transition: border-color 0.2s;
+  box-sizing: border-box;
+}
+
+.ytlinker-search:hover,
+.ytlinker-search:focus {
+  border-color: var(--color-accent);
+  outline: none;
+}
+
+/* Dropdown for channel list */
+.ytlinker-dropdown {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  right: 0;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-top: none;
+  border-radius: 0 0 6px 6px;
+  max-height: 200px;
+  overflow-y: auto;
+  z-index: 10;
+  display: none;
+}
+
+.ytlinker-search:focus ~ .ytlinker-dropdown {
+  display: block;
+}
+
+.ytlinker-dropdown:hover {
+  display: block;
+}
+
+.ytlinker-search:focus ~ .ytlinker-dropdown:hover {
+  display: block;
+}
+
+.ytlinker-no-channels {
+  padding: 16px;
+  text-align: center;
+  color: var(--color-text-muted);
+  font-size: 13px;
+}
+
+.ytlinker-channel-item {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 12px;
+  background: none;
+  border: none;
+  border-bottom: 1px solid var(--color-border-dark);
+  color: var(--color-text-primary);
+  cursor: pointer;
+  transition: background 0.2s;
+  text-align: left;
+  font-size: 13px;
+}
+
+.ytlinker-channel-item:last-child {
+  border-bottom: none;
+}
+
+.ytlinker-channel-item:hover {
+  background: var(--color-bg-tertiary);
+}
+
+
+.ytlinker-channel-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.ytlinker-channel-display-name {
+  font-weight: 600;
+  color: var(--color-text-primary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.ytlinker-channel-username {
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.ytlinker-selected-display {
+  padding: 6px 10px;
+  background: rgba(99, 102, 241, 0.1);
+  border: 1px solid var(--color-accent);
+  border-radius: 6px;
+  color: var(--color-accent);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.ytlinker-error {
+  color: #ef4444;
+  font-size: 12px;
+  padding: 4px 0;
+}
+
+.ytlinker-add-button {
+  padding: 10px 16px;
+  background: #FF0000;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 13px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  transition: all 0.2s;
+  white-space: nowrap;
+}
+
+.ytlinker-add-button:hover:not(:disabled) {
+  background: #cc0000;
+  transform: translateY(-1px);
+}
+
+.ytlinker-add-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+/* Linked items list */
+.ytlinker-items {
+  flex: 1;
+  overflow-y: auto;
+  margin-bottom: 16px;
+  padding-right: 8px;
+}
+
+.ytlinker-items::-webkit-scrollbar {
+  width: 6px;
+}
+
+.ytlinker-items::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.ytlinker-items::-webkit-scrollbar-thumb {
+  background: var(--color-border-medium);
+  border-radius: 3px;
+}
+
+.ytlinker-items::-webkit-scrollbar-thumb:hover {
+  background: var(--color-accent);
+}
+
+.ytlinker-empty {
+  text-align: center;
+  color: var(--color-text-muted);
+  font-size: 13px;
+  padding: 20px;
+  margin: 0;
+}
+
+.ytlinker-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 12px;
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  margin-bottom: 8px;
+  transition: all 0.2s;
+}
+
+.ytlinker-item:hover {
+  background: var(--color-bg-tertiary);
+  border-color: var(--color-accent);
+}
+
+.ytlinker-item-info {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  flex: 1;
+  min-width: 0;
+}
+
+.ytlinker-item-details {
+  min-width: 0;
+  flex: 1;
+}
+
+.ytlinker-item-name {
+  font-weight: 600;
+  font-size: 14px;
+  color: var(--color-text-primary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.ytlinker-item-url {
+  font-size: 12px;
+  color: #FFFFFF;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  text-decoration: none;
+  display: block;
+}
+
+.ytlinker-item-url:hover {
+  text-decoration: underline;
+}
+
+.ytlinker-remove-button {
+  background: none;
+  border: none;
+  color: #FF0000;
+  cursor: pointer;
+  padding: 6px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.2s;
+  flex-shrink: 0;
+  font-size: 14px;
+}
+
+.ytlinker-remove-button:hover {
+  color: #cc0000;
+  transform: scale(1.1);
+}
+
+/* Footer */
+.ytlinker-footer {
+  border-top: 1px solid var(--color-border-medium);
+  padding-top: 16px;
+}
+
+.ytlinker-info-text {
+  display: flex;
+  align-items: center;
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  margin: 0 0 12px 0;
+}
+
+.ytlinker-close-button {
+  width: 100%;
+  padding: 10px;
+  background: var(--color-bg-secondary);
+  color: var(--color-text-primary);
+  border: 1px solid var(--color-border-medium);
+  border-radius: 6px;
+  font-weight: 600;
+  font-size: 13px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.ytlinker-close-button:hover {
+  background: var(--color-bg-tertiary);
+  border-color: var(--color-accent);
+}
+
+@media (max-width: 480px) {
+  .ytlinker-manager {
+    padding: 20px;
+    max-width: 100%;
+    max-height: 90vh;
+  }
+
+  .ytlinker-manager h2 {
+    font-size: 18px;
+  }
+}

src/styles/global.css

@@ -0,0 +1,36 @@
+@import './vars.css';
+
+* {
+  box-sizing: border-box;
+}
+
+html {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
+    Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+body {
+  margin: 0;
+  padding: 0;
+  background: var(--color-bg-primary);
+  min-height: 100vh;
+  color: var(--color-text-primary);
+}
+
+#app {
+  min-height: 100vh;
+}
+
+/* Responsive layout - stack vertically on smaller screens */
+@media (max-width: 1024px) {
+  [data-app-grid] {
+    grid-template-columns: 1fr;
+    grid-template-rows: auto 1fr;
+  }
+  
+  [data-stream-embed] {
+    max-height: 50vh;
+  }
+}

src/styles/vars.css

@@ -0,0 +1,59 @@
+/* Normalized Color Palette */
+:root {
+  /* Primary Background Colors */
+  --color-bg-primary: #0a0a0a;
+  --color-bg-secondary: #1a1a1a;
+  --color-bg-tertiary: #2a2a2a;
+  --color-bg-hover: #3a3a3a;
+
+  /* Border & Divider Colors */
+  --color-border-dark: #1a1a1a;
+  --color-border-medium: #333333;
+  --color-border-light: #444444;
+  --color-border-lighter: #555555;
+
+  /* Text Colors */
+  --color-text-primary: #e2e8f0;
+  --color-text-secondary: #94a3b8;
+  --color-text-muted: #64748b;
+  --color-text-white: #ffffff;
+
+  /* Platform Colors */
+  --color-twitch: #9146ff;
+  --color-youtube: #ff0000;
+
+  /* Accent Color */
+  --color-accent: #9e4073;
+  --color-accent-hover: #5e2645;
+
+  /* Status Colors */
+  --color-status-success: #d1fae5;
+  --color-status-success-text: #065f46;
+  --color-status-error: #fee2e2;
+  --color-status-error-text: #7f1d1d;
+
+  /* Notification Colors */
+  --color-notification-success: #10b981;
+  --color-notification-success-border: #059669;
+  --color-notification-error: #ef4444;
+  --color-notification-error-border: #dc2626;
+  --color-notification-info: #3b82f6;
+  --color-notification-info-border: #2563eb;
+
+  /* Shadow */
+  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
+  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
+  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
+  --shadow-sm-dark: 2px 0 10px rgba(0, 0, 0, 0.5);
+  --shadow-accent-sm: 0 0 0 3px rgba(99, 102, 241, 0.1);
+  --shadow-accent-md: 0 4px 12px rgba(99, 102, 241, 0.2);
+  --shadow-accent-lg: 0 10px 40px rgba(99, 102, 241, 0.15);
+
+  /* Border Radius */
+  --radius-sm: 3px;
+  --radius-md: 4px;
+  --radius-lg: 6px;
+  --radius-xl: 8px;
+  --radius-2xl: 12px;
+  --radius-full: 50%;
+}

src/types/twitch-m3u8.d.ts

@@ -0,0 +1,6 @@
+declare module "twitch-m3u8" {
+  export function getStream(channel: string, raw?: boolean): Promise<string>;
+  export default {
+    getStream,
+  };
+}