fix: drop stalled browser websocket clients

main.py

@@ -2005,11 +2005,16 @@ async def _broadcast_to_browser_clients(snapshot: dict):
 
     for ws in list(browser_conns):
         try:
-            await ws.send_json(data)
+            await asyncio.wait_for(ws.send_json(data), timeout=1.0)
         except (WebSocketDisconnect, RuntimeError, ConnectionAbortedError) as e:
             # Collect disconnected clients for cleanup
             disconnected_clients.append(ws)
             logger.debug(f"Detected disconnected browser client: {e}")
+        except asyncio.TimeoutError:
+            disconnected_clients.append(ws)
+            logger.warning(
+                "Timed out broadcasting to browser client; removing stale connection"
+            )
         except Exception as e:
             # Handle any other unexpected errors
             disconnected_clients.append(ws)