Bugs are fixed in the backend, it works now

web/backend/services/progress_publisher.py

@@ -0,0 +1,49 @@
+"""WebSocket progress publisher – decouples task manager from WebSocket."""
+
+import json
+from typing import Dict, Set
+
+from fastapi import WebSocket
+
+# Active WebSocket connections
+active_connections: Dict[str, Set[WebSocket]] = {}
+
+
+def publish_progress(task_id: str, progress: int, message: str, status: str = "processing"):
+    if task_id not in active_connections:
+        return
+
+    data = {
+        "type": "progress",
+        "data": {
+            "task_id": task_id,
+            "status": status,
+            "progress": progress,
+            "message": message
+        }
+    }
+
+    to_remove = set()
+    for websocket in active_connections.get(task_id, set()):
+        try:
+            websocket.send_json(data)
+        except Exception:
+            to_remove.add(websocket)
+
+    for websocket in to_remove:
+        active_connections[task_id].discard(websocket)
+    if task_id in active_connections and not active_connections[task_id]:
+        del active_connections[task_id]
+
+
+def register_connection(task_id: str, websocket: WebSocket):
+    if task_id not in active_connections:
+        active_connections[task_id] = set()
+    active_connections[task_id].add(websocket)
+
+
+def unregister_connection(task_id: str, websocket: WebSocket):
+    if task_id in active_connections:
+        active_connections[task_id].discard(websocket)
+        if not active_connections[task_id]:
+            del active_connections[task_id]