fix(webui): clear stale run status on reconnect

tests/command/test_stop_pending_queue.py

@@ -16,12 +16,12 @@ async def test_cmd_stop_drains_pending_queue():
     mock_loop = MagicMock()
     mock_loop._cancel_active_tasks = AsyncMock(return_value=1)
     mock_loop._pending_queues = {}
-    
+
     pending = asyncio.Queue()
     await pending.put("msg1")
     await pending.put("msg2")
     mock_loop._pending_queues["test-session"] = pending
-    
+
     ctx = CommandContext(
         msg=MagicMock(channel="websocket", chat_id="test-chat", metadata={}),
         session=None,
@@ -29,9 +29,9 @@ async def test_cmd_stop_drains_pending_queue():
         raw="/stop",
         loop=mock_loop,
     )
-    
+
     result = await cmd_stop(ctx)
-    
+
     assert isinstance(result, OutboundMessage)
     assert "Stopped 3 task(s)" in result.content  # 1 cancelled + 2 drained
     assert "test-session" not in mock_loop._pending_queues
@@ -43,10 +43,10 @@ async def test_cmd_stop_with_empty_pending_queue():
     mock_loop = MagicMock()
     mock_loop._cancel_active_tasks = AsyncMock(return_value=2)
     mock_loop._pending_queues = {}
-    
+
     pending = asyncio.Queue()
     mock_loop._pending_queues["test-session"] = pending
-    
+
     ctx = CommandContext(
         msg=MagicMock(channel="websocket", chat_id="test-chat", metadata={}),
         session=None,
@@ -54,9 +54,9 @@ async def test_cmd_stop_with_empty_pending_queue():
         raw="/stop",
         loop=mock_loop,
     )
-    
+
     result = await cmd_stop(ctx)
-    
+
     assert "Stopped 2 task(s)" in result.content
     assert "test-session" not in mock_loop._pending_queues
 
@@ -67,7 +67,7 @@ async def test_cmd_stop_no_pending_queue():
     mock_loop = MagicMock()
     mock_loop._cancel_active_tasks = AsyncMock(return_value=0)
     mock_loop._pending_queues = {}
-    
+
     ctx = CommandContext(
         msg=MagicMock(channel="websocket", chat_id="test-chat", metadata={}),
         session=None,
@@ -75,7 +75,7 @@ async def test_cmd_stop_no_pending_queue():
         raw="/stop",
         loop=mock_loop,
     )
-    
+
     result = await cmd_stop(ctx)
-    
+
     assert "No active task to stop" in result.content