fix: progress broadcasts now use correct WebSocket room names

- Fixed room name mismatch: ProgressService was broadcasting to
  'download_progress' but JS clients join 'downloads' room
- Added _get_room_for_progress_type() mapping function
- Updated all progress methods to use correct room names
- Added 13 new tests for room name mapping and broadcast verification
- Updated existing tests to expect correct room names
- Fixed JS clients to join valid rooms (downloads, queue, scan)

src/server/services/progress_service.py

@@ -133,6 +133,30 @@ class ProgressServiceError(Exception):
     """Service-level exception for progress operations."""
 
 
+# Mapping from ProgressType to WebSocket room names
+# This ensures compatibility with the valid rooms defined in the WebSocket API:
+# "downloads", "queue", "scan", "system", "errors"
+_PROGRESS_TYPE_TO_ROOM: Dict[ProgressType, str] = {
+    ProgressType.DOWNLOAD: "downloads",
+    ProgressType.SCAN: "scan",
+    ProgressType.QUEUE: "queue",
+    ProgressType.SYSTEM: "system",
+    ProgressType.ERROR: "errors",
+}
+
+
+def _get_room_for_progress_type(progress_type: ProgressType) -> str:
+    """Get the WebSocket room name for a progress type.
+    
+    Args:
+        progress_type: The type of progress update
+        
+    Returns:
+        The WebSocket room name to broadcast to
+    """
+    return _PROGRESS_TYPE_TO_ROOM.get(progress_type, "system")
+
+
 class ProgressService:
     """Manages real-time progress updates and broadcasting.
 
@@ -293,7 +317,7 @@ class ProgressService:
             )
 
         # Emit event to subscribers
-        room = f"{progress_type.value}_progress"
+        room = _get_room_for_progress_type(progress_type)
         event = ProgressEvent(
             event_type=f"{progress_type.value}_progress",
             progress_id=progress_id,
@@ -370,7 +394,7 @@ class ProgressService:
             should_broadcast = force_broadcast or percent_change >= 1.0
 
         if should_broadcast:
-            room = f"{update.type.value}_progress"
+            room = _get_room_for_progress_type(update.type)
             event = ProgressEvent(
                 event_type=f"{update.type.value}_progress",
                 progress_id=progress_id,
@@ -427,7 +451,7 @@ class ProgressService:
             )
 
         # Emit completion event
-        room = f"{update.type.value}_progress"
+        room = _get_room_for_progress_type(update.type)
         event = ProgressEvent(
             event_type=f"{update.type.value}_progress",
             progress_id=progress_id,
@@ -483,7 +507,7 @@ class ProgressService:
             )
 
         # Emit failure event
-        room = f"{update.type.value}_progress"
+        room = _get_room_for_progress_type(update.type)
         event = ProgressEvent(
             event_type=f"{update.type.value}_progress",
             progress_id=progress_id,
@@ -533,7 +557,7 @@ class ProgressService:
             )
 
         # Emit cancellation event
-        room = f"{update.type.value}_progress"
+        room = _get_room_for_progress_type(update.type)
         event = ProgressEvent(
             event_type=f"{update.type.value}_progress",
             progress_id=progress_id,

src/server/web/static/js/app.js

@@ -186,9 +186,10 @@ class AniWorldApp {
             console.log('Connected to server');
             
             // Subscribe to rooms for targeted updates
-            this.socket.join('scan_progress');
-            this.socket.join('download_progress');
+            // Valid rooms: downloads, queue, scan, system, errors
+            this.socket.join('scan');
             this.socket.join('downloads');
+            this.socket.join('queue');
             
             this.showToast(this.localization.getText('connected-server'), 'success');
             this.updateConnectionStatus();

src/server/web/static/js/queue.js

@@ -32,8 +32,9 @@ class QueueManager {
             console.log('Connected to server');
             
             // Subscribe to rooms for targeted updates
+            // Valid rooms: downloads, queue, scan, system, errors
             this.socket.join('downloads');
-            this.socket.join('download_progress');
+            this.socket.join('queue');
             
             this.showToast('Connected to server', 'success');
         });

tests/integration/test_download_progress_integration.py

@@ -180,9 +180,9 @@ class TestDownloadProgressIntegration:
         connection_id = "test_client_1"
         await websocket_service.connect(mock_ws, connection_id)
         
-        # Join the queue_progress room to receive queue updates
+        # Join the queue room to receive queue updates
         await websocket_service.manager.join_room(
-            connection_id, "queue_progress"
+            connection_id, "queue"
         )
         
         # Subscribe to progress events and forward to WebSocket
@@ -254,12 +254,12 @@ class TestDownloadProgressIntegration:
         await websocket_service.connect(client1, "client1")
         await websocket_service.connect(client2, "client2")
         
-        # Join both clients to the queue_progress room
+        # Join both clients to the queue room
         await websocket_service.manager.join_room(
-            "client1", "queue_progress"
+            "client1", "queue"
         )
         await websocket_service.manager.join_room(
-            "client2", "queue_progress"
+            "client2", "queue"
         )
         
         # Subscribe to progress events and forward to WebSocket

tests/integration/test_websocket_integration.py

@@ -325,8 +325,9 @@ class TestWebSocketScanIntegration:
         assert len(broadcasts) >= 2  # At least start and complete
 
         # Check for scan progress broadcasts
+        # Room name is 'scan' for SCAN type progress
         scan_broadcasts = [
-            b for b in broadcasts if b["room"] == "scan_progress"
+            b for b in broadcasts if b["room"] == "scan"
         ]
         assert len(scan_broadcasts) >= 2
 
@@ -379,8 +380,9 @@ class TestWebSocketScanIntegration:
             await anime_service.rescan()
 
         # Verify failure broadcast
+        # Room name is 'scan' for SCAN type progress
         scan_broadcasts = [
-            b for b in broadcasts if b["room"] == "scan_progress"
+            b for b in broadcasts if b["room"] == "scan"
         ]
         assert len(scan_broadcasts) >= 2  # Start and fail
 
@@ -438,7 +440,7 @@ class TestWebSocketProgressIntegration:
 
         start_broadcast = broadcasts[0]
         assert start_broadcast["data"]["status"] == "started"
-        assert start_broadcast["room"] == "download_progress"
+        assert start_broadcast["room"] == "downloads"  # Room name for DOWNLOAD type
 
         update_broadcast = broadcasts[1]
         assert update_broadcast["data"]["status"] == "in_progress"

tests/unit/test_progress_service.py

@@ -352,7 +352,7 @@ class TestProgressService:
         # First positional arg is ProgressEvent
         call_args = mock_broadcast.call_args[0][0]
         assert call_args.event_type == "download_progress"
-        assert call_args.room == "download_progress"
+        assert call_args.room == "downloads"  # Room name for DOWNLOAD type
         assert call_args.progress_id == "test-1"
         assert call_args.progress.id == "test-1"
 

tests/unit/test_queue_progress_broadcast.py

@@ -0,0 +1,445 @@
+"""Unit tests for queue progress broadcast to correct WebSocket rooms.
+
+This module tests that download progress events are broadcast to the
+correct WebSocket rooms ('downloads' for DOWNLOAD type progress).
+These tests verify the fix for progress not transmitting to clients.
+
+No real downloads are started - all tests use mocks to verify the
+event flow from ProgressService through WebSocket broadcasting.
+"""
+import asyncio
+from typing import Any, Dict, List
+from unittest.mock import AsyncMock
+
+import pytest
+
+from src.server.services.progress_service import (
+    ProgressEvent,
+    ProgressService,
+    ProgressStatus,
+    ProgressType,
+    _get_room_for_progress_type,
+)
+from src.server.services.websocket_service import WebSocketService
+
+
+class TestRoomNameMapping:
+    """Tests for progress type to room name mapping."""
+
+    def test_download_progress_maps_to_downloads_room(self):
+        """Test that DOWNLOAD type maps to 'downloads' room."""
+        room = _get_room_for_progress_type(ProgressType.DOWNLOAD)
+        assert room == "downloads"
+
+    def test_scan_progress_maps_to_scan_room(self):
+        """Test that SCAN type maps to 'scan' room."""
+        room = _get_room_for_progress_type(ProgressType.SCAN)
+        assert room == "scan"
+
+    def test_queue_progress_maps_to_queue_room(self):
+        """Test that QUEUE type maps to 'queue' room."""
+        room = _get_room_for_progress_type(ProgressType.QUEUE)
+        assert room == "queue"
+
+    def test_system_progress_maps_to_system_room(self):
+        """Test that SYSTEM type maps to 'system' room."""
+        room = _get_room_for_progress_type(ProgressType.SYSTEM)
+        assert room == "system"
+
+    def test_error_progress_maps_to_errors_room(self):
+        """Test that ERROR type maps to 'errors' room."""
+        room = _get_room_for_progress_type(ProgressType.ERROR)
+        assert room == "errors"
+
+
+class TestProgressServiceBroadcastRoom:
+    """Tests for ProgressService broadcasting to correct rooms."""
+
+    @pytest.fixture
+    def progress_service(self):
+        """Create a fresh ProgressService for each test."""
+        return ProgressService()
+
+    @pytest.fixture
+    def mock_handler(self):
+        """Create a mock event handler to capture broadcasts."""
+        return AsyncMock()
+
+    @pytest.mark.asyncio
+    async def test_start_download_progress_broadcasts_to_downloads_room(
+        self, progress_service, mock_handler
+    ):
+        """Test start_progress with DOWNLOAD type uses 'downloads' room."""
+        # Subscribe to progress events
+        progress_service.subscribe("progress_updated", mock_handler)
+
+        # Start a download progress
+        await progress_service.start_progress(
+            progress_id="test-download-1",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+            message="Downloading episode",
+        )
+
+        # Verify handler was called with correct room
+        mock_handler.assert_called_once()
+        event: ProgressEvent = mock_handler.call_args[0][0]
+        
+        assert event.room == "downloads", (
+            f"Expected room 'downloads' but got '{event.room}'"
+        )
+        assert event.event_type == "download_progress"
+        assert event.progress.status == ProgressStatus.STARTED
+
+    @pytest.mark.asyncio
+    async def test_update_download_progress_broadcasts_to_downloads_room(
+        self, progress_service, mock_handler
+    ):
+        """Test update_progress with DOWNLOAD type uses 'downloads' room."""
+        # Start progress first
+        await progress_service.start_progress(
+            progress_id="test-download-2",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+            total=100,
+        )
+
+        # Subscribe after start to only capture update event
+        progress_service.subscribe("progress_updated", mock_handler)
+
+        # Update progress with force_broadcast
+        await progress_service.update_progress(
+            progress_id="test-download-2",
+            current=50,
+            message="50% complete",
+            force_broadcast=True,
+        )
+
+        # Verify handler was called with correct room
+        mock_handler.assert_called_once()
+        event: ProgressEvent = mock_handler.call_args[0][0]
+        
+        assert event.room == "downloads", (
+            f"Expected room 'downloads' but got '{event.room}'"
+        )
+        assert event.event_type == "download_progress"
+        assert event.progress.status == ProgressStatus.IN_PROGRESS
+        assert event.progress.percent == 50.0
+
+    @pytest.mark.asyncio
+    async def test_complete_download_progress_broadcasts_to_downloads_room(
+        self, progress_service, mock_handler
+    ):
+        """Test complete_progress with DOWNLOAD uses 'downloads' room."""
+        # Start progress first
+        await progress_service.start_progress(
+            progress_id="test-download-3",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+        )
+
+        # Subscribe after start to only capture complete event
+        progress_service.subscribe("progress_updated", mock_handler)
+
+        # Complete progress
+        await progress_service.complete_progress(
+            progress_id="test-download-3",
+            message="Download completed",
+        )
+
+        # Verify handler was called with correct room
+        mock_handler.assert_called_once()
+        event: ProgressEvent = mock_handler.call_args[0][0]
+        
+        assert event.room == "downloads", (
+            f"Expected room 'downloads' but got '{event.room}'"
+        )
+        assert event.event_type == "download_progress"
+        assert event.progress.status == ProgressStatus.COMPLETED
+
+    @pytest.mark.asyncio
+    async def test_fail_download_progress_broadcasts_to_downloads_room(
+        self, progress_service, mock_handler
+    ):
+        """Test that fail_progress with DOWNLOAD type uses 'downloads' room."""
+        # Start progress first
+        await progress_service.start_progress(
+            progress_id="test-download-4",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+        )
+
+        # Subscribe after start to only capture fail event
+        progress_service.subscribe("progress_updated", mock_handler)
+
+        # Fail progress
+        await progress_service.fail_progress(
+            progress_id="test-download-4",
+            error_message="Connection lost",
+        )
+
+        # Verify handler was called with correct room
+        mock_handler.assert_called_once()
+        event: ProgressEvent = mock_handler.call_args[0][0]
+        
+        assert event.room == "downloads", (
+            f"Expected room 'downloads' but got '{event.room}'"
+        )
+        assert event.event_type == "download_progress"
+        assert event.progress.status == ProgressStatus.FAILED
+
+    @pytest.mark.asyncio
+    async def test_queue_progress_broadcasts_to_queue_room(
+        self, progress_service, mock_handler
+    ):
+        """Test that QUEUE type progress uses 'queue' room."""
+        progress_service.subscribe("progress_updated", mock_handler)
+
+        await progress_service.start_progress(
+            progress_id="test-queue-1",
+            progress_type=ProgressType.QUEUE,
+            title="Queue Status",
+        )
+
+        mock_handler.assert_called_once()
+        event: ProgressEvent = mock_handler.call_args[0][0]
+        
+        assert event.room == "queue", (
+            f"Expected room 'queue' but got '{event.room}'"
+        )
+        assert event.event_type == "queue_progress"
+
+
+class TestEndToEndProgressBroadcast:
+    """End-to-end tests for progress broadcast via WebSocket."""
+
+    @pytest.fixture
+    def websocket_service(self):
+        """Create a WebSocketService."""
+        return WebSocketService()
+
+    @pytest.fixture
+    def progress_service(self):
+        """Create a ProgressService."""
+        return ProgressService()
+
+    @pytest.mark.asyncio
+    async def test_progress_broadcast_reaches_downloads_room_clients(
+        self, websocket_service, progress_service
+    ):
+        """Test that download progress reaches clients in 'downloads' room.
+        
+        This is the key test verifying the fix: progress updates should
+        be broadcast to the 'downloads' room, not 'download_progress'.
+        """
+        # Track messages received by mock client
+        received_messages: List[Dict[str, Any]] = []
+
+        # Create mock WebSocket
+        class MockWebSocket:
+            async def accept(self):
+                pass
+
+            async def send_json(self, data):
+                received_messages.append(data)
+
+            async def receive_json(self):
+                await asyncio.sleep(10)
+
+        # Connect client to WebSocket service
+        mock_ws = MockWebSocket()
+        connection_id = "test_client"
+        await websocket_service.connect(mock_ws, connection_id)
+
+        # Join the 'downloads' room (this is what the JS client does)
+        await websocket_service.manager.join_room(connection_id, "downloads")
+
+        # Set up the progress event handler (mimics fastapi_app.py)
+        async def progress_event_handler(event: ProgressEvent) -> None:
+            """Handle progress events and broadcast via WebSocket."""
+            message = {
+                "type": event.event_type,
+                "data": event.progress.to_dict(),
+            }
+            await websocket_service.manager.broadcast_to_room(
+                message, event.room
+            )
+
+        progress_service.subscribe("progress_updated", progress_event_handler)
+
+        # Simulate download progress lifecycle
+        # 1. Start download
+        await progress_service.start_progress(
+            progress_id="real-download-test",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Downloading Anime Episode",
+            total=100,
+            metadata={"item_id": "item-123"},
+        )
+
+        # 2. Update progress multiple times
+        for percent in [25, 50, 75]:
+            await progress_service.update_progress(
+                progress_id="real-download-test",
+                current=percent,
+                message=f"{percent}% complete",
+                metadata={"speed_mbps": 2.5},
+                force_broadcast=True,
+            )
+
+        # 3. Complete download
+        await progress_service.complete_progress(
+            progress_id="real-download-test",
+            message="Download completed successfully",
+        )
+
+        # Verify client received all messages
+        # Filter for download_progress type messages
+        download_messages = [
+            m for m in received_messages
+            if m.get("type") == "download_progress"
+        ]
+
+        # Should have: start + 3 updates + complete = 5 messages
+        assert len(download_messages) >= 4, (
+            f"Expected at least 4 download_progress messages, "
+            f"got {len(download_messages)}: {download_messages}"
+        )
+
+        # Verify first message is start
+        assert download_messages[0]["data"]["status"] == "started"
+
+        # Verify last message is completed
+        assert download_messages[-1]["data"]["status"] == "completed"
+        assert download_messages[-1]["data"]["percent"] == 100.0
+
+        # Cleanup
+        await websocket_service.disconnect(connection_id)
+
+    @pytest.mark.asyncio
+    async def test_clients_not_in_downloads_room_dont_receive_progress(
+        self, websocket_service, progress_service
+    ):
+        """Test that clients not in 'downloads' room don't receive progress."""
+        downloads_messages: List[Dict] = []
+        other_messages: List[Dict] = []
+
+        class MockWebSocket:
+            def __init__(self, message_list):
+                self.messages = message_list
+
+            async def accept(self):
+                pass
+
+            async def send_json(self, data):
+                self.messages.append(data)
+
+            async def receive_json(self):
+                await asyncio.sleep(10)
+
+        # Client in 'downloads' room
+        ws_downloads = MockWebSocket(downloads_messages)
+        await websocket_service.connect(ws_downloads, "client_downloads")
+        await websocket_service.manager.join_room(
+            "client_downloads", "downloads"
+        )
+
+        # Client in 'system' room (different room)
+        ws_other = MockWebSocket(other_messages)
+        await websocket_service.connect(ws_other, "client_other")
+        await websocket_service.manager.join_room("client_other", "system")
+
+        # Set up progress handler
+        async def progress_event_handler(event: ProgressEvent) -> None:
+            message = {
+                "type": event.event_type,
+                "data": event.progress.to_dict(),
+            }
+            await websocket_service.manager.broadcast_to_room(
+                message, event.room
+            )
+
+        progress_service.subscribe("progress_updated", progress_event_handler)
+
+        # Emit download progress
+        await progress_service.start_progress(
+            progress_id="isolation-test",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+        )
+
+        # Only 'downloads' room client should receive the message
+        download_progress_in_downloads = [
+            m for m in downloads_messages
+            if m.get("type") == "download_progress"
+        ]
+        download_progress_in_other = [
+            m for m in other_messages
+            if m.get("type") == "download_progress"
+        ]
+
+        assert len(download_progress_in_downloads) == 1, (
+            "Client in 'downloads' room should receive download_progress"
+        )
+        assert len(download_progress_in_other) == 0, (
+            "Client in 'system' room should NOT receive download_progress"
+        )
+
+        # Cleanup
+        await websocket_service.disconnect("client_downloads")
+        await websocket_service.disconnect("client_other")
+
+    @pytest.mark.asyncio
+    async def test_progress_update_includes_item_id_in_metadata(
+        self, websocket_service, progress_service
+    ):
+        """Test progress updates include item_id for JS client matching."""
+        received_messages: List[Dict] = []
+
+        class MockWebSocket:
+            async def accept(self):
+                pass
+
+            async def send_json(self, data):
+                received_messages.append(data)
+
+            async def receive_json(self):
+                await asyncio.sleep(10)
+
+        mock_ws = MockWebSocket()
+        await websocket_service.connect(mock_ws, "test_client")
+        await websocket_service.manager.join_room("test_client", "downloads")
+
+        async def progress_event_handler(event: ProgressEvent) -> None:
+            message = {
+                "type": event.event_type,
+                "data": event.progress.to_dict(),
+            }
+            await websocket_service.manager.broadcast_to_room(
+                message, event.room
+            )
+
+        progress_service.subscribe("progress_updated", progress_event_handler)
+
+        # Start progress with item_id in metadata
+        item_id = "uuid-12345-67890"
+        await progress_service.start_progress(
+            progress_id=f"download_{item_id}",
+            progress_type=ProgressType.DOWNLOAD,
+            title="Test Download",
+            metadata={"item_id": item_id},
+        )
+
+        # Verify item_id is present in broadcast
+        download_messages = [
+            m for m in received_messages
+            if m.get("type") == "download_progress"
+        ]
+        
+        assert len(download_messages) == 1
+        metadata = download_messages[0]["data"].get("metadata", {})
+        assert metadata.get("item_id") == item_id, (
+            f"Expected item_id '{item_id}' in metadata, got: {metadata}"
+        )
+
+        await websocket_service.disconnect("test_client")