feat: add chat group daily summarizer

- Telegram collector (Telethon MTProto) with checkpoint-based message fetching
- Claude API summarization via proxy (haiku model)
- Dashboard page with date picker, markdown summary, raw message drill-down
- Separate container lifecycle from dashboard for stable Telethon sessions
- Shared SQLite DB mounted read-only into dashboard

dashboard/backend/main.py

@@ -5,7 +5,7 @@ from fastapi.responses import JSONResponse
 from slowapi import Limiter
 from slowapi.util import get_remote_address
 from slowapi.errors import RateLimitExceeded
-from routers import docker_router, gitea, files, terminal, system, auth
+from routers import docker_router, gitea, files, terminal, system, auth, chat_summary
 import auth as auth_module
 
 import asyncio
@@ -139,6 +139,7 @@ app.include_router(docker_router.router, prefix="/api/docker", dependencies=[Dep
 app.include_router(gitea.router, prefix="/api/gitea", dependencies=[Depends(auth_module.get_current_user)])
 app.include_router(files.router, prefix="/api/files", dependencies=[Depends(auth_module.get_current_user)])
 app.include_router(system.router, prefix="/api/system", dependencies=[Depends(auth_module.get_current_user)])
+app.include_router(chat_summary.router, prefix="/api/chat-summary", dependencies=[Depends(auth_module.get_current_user)])
 
 # WebSocket endpoint (auth handled inside handler via Query param)
 app.add_api_websocket_route("/ws/terminal", terminal.ws_endpoint)