Introduce client-side emoji picker and richer reaction UX, and propagate user IDs for reactions over the WS protocol. Backend: include user_id in reaction events. Frontend: add EmojiPicker component; update useChatSocket types to include user_id; handle "reaction" events in ChatRoomPage to update cached messages (add/remove/switch reactions). Message component: UI overhaul — action menu with slide-out actions, toggle button (⋮→✕), emoji picker trigger, grouped reaction buttons that show counts and indicate "mine" state, and various layout/cleanups. Media: defer video loading by setting preload="none" in ChatMediaGallery, MediaGallery and PostComposer to improve performance.
Expanded chat backend with message reply, edit, delete, and reaction support in consumers and models. Updated routing to use chat_id. Added chat-related view stubs. On the frontend, introduced ChatLayout and ChatPage scaffolding, and routed protected routes through ChatLayout.
Implemented comprehensive models for chat functionality, including Chat, Message, MessageHistory, MessageReaction, and MessageFile. Updated ChatConsumer to enforce authentication and improve message handling. Added initial scaffolding for 'pages' and 'posts' Django apps with basic files.
