Frontend and backend work together fine, complete workflow is implemented

web/backend/services/progress_publisher.py

@@ -1,15 +1,20 @@
 """WebSocket progress publisher – decouples task manager from WebSocket."""
 
-import json
+import asyncio
 from typing import Dict, Set
 
 from fastapi import WebSocket
 
-# Active WebSocket connections
+# This will be set by main.py when the app starts
+MAIN_LOOP = None
+
 active_connections: Dict[str, Set[WebSocket]] = {}
 
 
 def publish_progress(task_id: str, progress: int, message: str, status: str = "processing"):
+    """
+    Publish progress update to all connected WebSocket clients for a task.
+    """
     if task_id not in active_connections:
         return
 
@@ -26,10 +31,14 @@ def publish_progress(task_id: str, progress: int, message: str, status: str = "p
     to_remove = set()
     for websocket in active_connections.get(task_id, set()):
         try:
-            websocket.send_json(data)
+            # Use the stored main loop, or fallback to getting the current loop
+            loop = MAIN_LOOP or asyncio.get_running_loop()
+            asyncio.run_coroutine_threadsafe(websocket.send_json(data), loop)
         except Exception:
+            # Client disconnected or other error
             to_remove.add(websocket)
 
+    # Clean up disconnected clients
     for websocket in to_remove:
         active_connections[task_id].discard(websocket)
     if task_id in active_connections and not active_connections[task_id]:
@@ -37,13 +46,15 @@ def publish_progress(task_id: str, progress: int, message: str, status: str = "p
 
 
 def register_connection(task_id: str, websocket: WebSocket):
+    """Register a WebSocket connection for a task."""
     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):
+    """Unregister a WebSocket connection for a task."""
     if task_id in active_connections:
         active_connections[task_id].discard(websocket)
         if not active_connections[task_id]:
-            del active_connections[task_id]
+            del active_connections[task_id]