ZacharyZcR dfc92428e0 SECURITY: Eliminate complex fallback storage, enforce environment variables ...

Core changes:
- Remove file/database fallback storage complexity
- Enforce JWT_SECRET and DATABASE_KEY as environment variables only
- Auto-generate keys on first startup with clear user guidance
- Eliminate circular dependencies and storage layer abstractions

Security improvements:
- Single source of truth for secrets (environment variables)
- No persistent storage of secrets in files or database
- Clear deployment guidance for production environments
- Simplified attack surface by removing storage complexity

WebSocket authentication:
- Implement JWT authentication for WebSocket handshake
- Add connection limits and user tracking
- Update frontend to pass JWT tokens in WebSocket URLs
- Configure Nginx for authenticated WebSocket proxy

Additional fixes:
- Replace CORS wildcard with specific origins
- Remove password logging security vulnerability
- Streamline encryption architecture following Linus principles

2025-09-22 08:57:37 +08:00

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