v0.5.0 — Antigravity support + proxy/session fixes

agentchattr v0.5.0 — Antigravity support + proxy/session fixes

✨ New

• Antigravity (agy) is now a built-in agent — Google's Gemini-CLI successor. Run with python wrapper.py antigravity, plus Windows/macOS/Linux launchers. (#76)
• Floating day indicator — a WhatsApp-style date capsule appears while scrolling so you always know which day you're reading. (#77, #78)
• Message ids in the UI — every message header shows its id right after the time as 15:49:04 | #2442, the same number agents use to reference messages. (#70)
• MiniMax M3 is now the default MiniMax model. (#72)

🐛 Fixes

• MCP proxy emits a single Mcp-Session-Id header, so proxy-routed agents attach correctly on Claude Code 2.1.216+ (previously failed with 404 Session not found). (#79, #80)
• Session reclaim now survives sleep/restart, scoped so a deliberate close is a clean slate rather than reviving a dead session. (#75)
• Windows injection — fixed [I escape-sequence garbage from console focus events corrupting injected agent messages.
• Disconnect routing — "agent left" messages now post to the agent's own channel instead of #general, and @-tag toggles are remembered per channel.