feat: Implement recent chats feature with API endpoint and UI integration

app/main.py

@@ -14,6 +14,7 @@ from .models import (
     LoginStartRequest,
     LoginVerifyRequest,
     MessageTriggerResponse,
+    RecentChat,
     StatusResponse,
 )
 from .storage import (
@@ -136,6 +137,14 @@ async def list_hooks() -> List[HookResponse]:
     ]
 
 
+@app.get("/api/recent-chats", response_model=List[RecentChat])
+async def recent_chats() -> List[RecentChat]:
+    if not await telegram_service.is_authorized():
+        raise HTTPException(status_code=401, detail="Session not authorized")
+    chats = await telegram_service.fetch_recent_chats()
+    return chats
+
+
 @app.post("/api/hooks", response_model=HookResponse, status_code=201)
 async def create_hook(payload: HookCreate) -> HookResponse:
     hook = await create_hook_async(payload)