Implementa sistema de chat em tempo real entre agente e cliente

- Adiciona tabela liveChatSessions no schema Convex
- Cria convex/liveChat.ts com mutations e queries para chat
- Adiciona API routes para maquinas (sessions, messages, poll)
- Cria modulo chat.rs no Tauri com ChatRuntime e polling
- Adiciona comandos de chat no lib.rs (start/stop polling, open/close window)
- Cria componentes React do chat widget (ChatWidget, types)
- Adiciona botao "Iniciar Chat" no dashboard (ticket-chat-panel)
- Implementa menu de chat no system tray
- Polling de 2 segundos para maior responsividade
- Janela de chat flutuante, frameless, always-on-top

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/desktop/package.json

@@ -11,6 +11,9 @@
     "gen:icon": "node ./scripts/build-icon.mjs"
   },
   "dependencies": {
+    "@assistant-ui/react": "^0.7.0",
+    "@assistant-ui/react-markdown": "^0.3.0",
+    "@radix-ui/react-scroll-area": "^1.2.3",
     "@radix-ui/react-tabs": "^1.1.13",
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-opener": "^2",
@@ -19,7 +22,8 @@
     "@tauri-apps/plugin-updater": "^2",
     "lucide-react": "^0.544.0",
     "react": "^19.0.0",
-    "react-dom": "^19.0.0"
+    "react-dom": "^19.0.0",
+    "remark-gfm": "^4.0.0"
   },
   "devDependencies": {
     "@tauri-apps/cli": "^2",