v0.1.0 - Initial Release

Features

• Real-time messaging via SignalR
• JWT authentication with access and refresh tokens
• Channel management (create, set topic, delete)
• File and image uploads with magic-byte validation
• Image-to-ASCII conversion for terminal display
• Presence tracking (online, away, DND, invisible)
• 6 built-in TUI themes
• Rate limiting on auth, upload, and general endpoints
• Self-contained binary releases for Windows, Linux, and macOS