Introduces a new chat page with end-to-end encryption, conversation list, and message thread UI. Adds new API endpoints for unread message count and debugging chat keys/messages. Improves chat key validation and reciprocal conversation/message creation for local recipients. Removes the old ChatWidget component. Updates login and chat API logic for better Turnstile and key handling.
- Add recipient public key fetching in messages API endpoint for sent message decryption
- Include `isE2E` flag in message response to indicate end-to-end encryption status
- Simplify encrypted content handling by always returning `encryptedContent` field
- Add comprehensive debug logging throughout message loading pipeline for troubleshooting
- Improve key resolution logic to fetch recipient keys when not available in conversation data
- Add detailed logging for each message processing step including key availability and decryption status
- Enhance error handling with more descriptive error messages in key fetching operations
- Better distinguish between sent and received message decryption requirements with clear comments
- Add chat keys API endpoint for storing and retrieving encrypted RSA public/private key pairs
- Create client-side crypto utilities for E2E encryption/decryption with hybrid encryption support
- Implement useChatEncryption hook for managing encryption state and key generation in chat UI
- Add chatPublicKey and chatPrivateKeyEncrypted fields to user schema for key storage
- Update chat messages API to return encrypted content with sender's public key for decryption
- Modify send message endpoint to accept pre-encrypted content from client while maintaining legacy server-side encryption
- Update chat page UI to integrate client-side encryption workflow
- Ensure private keys are encrypted client-side with user password before transmission to server
- Server cannot decrypt message content in E2E mode, providing true end-to-end encryption