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.
