fix: reset queue progress flag after queue completes

- Reset _queue_progress_initialized after each queue run so the next
  run re-creates the 'download_queue' progress entry
- Handle 'already exists' ProgressServiceError in _init_queue_progress
  as a no-op success to cover concurrent-start edge cases
- Guard stop_downloads() progress update to avoid crashing when the
  entry was never created

docs/instructions.md

@@ -121,4 +121,96 @@ For each task completed:
 
 ---
 
-~~fix: on new added animes for the nfo the property plot is not loaded and written in nfo. make sure all properties are written on nfo creation~~ ✅ DONE
+fix: download not working:
+
+elf.\_progress_service.update_progress(
+
+File "/app/src/server/services/progress_service.py", line 369, in update_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found
+
+2026-03-11 15:15:42 [info ] Processing next item from queue item_id=108 remaining=2 serie=I Was Reincarnated as the 7th Prince So I Can Take My Time Perfecting My Magical Ability
+
+2026-03-11 15:15:42 [error ] Error in queue processing loop error=Progress with id 'download_queue' not found
+
+Traceback (most recent call last):
+
+File "/app/src/server/services/download_service.py", line 716, in \_process_queue
+
+    await self._progress_service.update_progress(
+
+File "/app/src/server/services/progress_service.py", line 369, in update_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found
+
+2026-03-11 15:15:43 [info ] Processing next item from queue item_id=109 remaining=1 serie=I Was Reincarnated as the 7th Prince So I Can Take My Time Perfecting My Magical Ability
+
+2026-03-11 15:15:43 [error ] Error in queue processing loop error=Progress with id 'download_queue' not found
+
+Traceback (most recent call last):
+
+File "/app/src/server/services/download_service.py", line 716, in \_process_queue
+
+    await self._progress_service.update_progress(
+
+File "/app/src/server/services/progress_service.py", line 369, in update_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found
+
+2026-03-11 15:15:44 [info ] Processing next item from queue item_id=110 remaining=0 serie=I Was Reincarnated as the 7th Prince So I Can Take My Time Perfecting My Magical Ability
+
+2026-03-11 15:15:44 [error ] Error in queue processing loop error=Progress with id 'download_queue' not found
+
+Traceback (most recent call last):
+
+File "/app/src/server/services/download_service.py", line 716, in \_process_queue
+
+    await self._progress_service.update_progress(
+
+File "/app/src/server/services/progress_service.py", line 369, in update_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found
+
+2026-03-11 15:15:45 [info ] Queue processing completed - all items processed
+
+ERROR: Task exception was never retrieved
+
+future: <Task finished name='Task-16373' coro=<DownloadService.\_process_queue() done, defined at /app/src/server/services/download_service.py:688> exception=ProgressServiceError("Progress with id 'download_queue' not found")>
+
+Traceback (most recent call last):
+
+File "/app/src/server/services/download_service.py", line 755, in \_process_queue
+
+    await self._progress_service.complete_progress(
+
+File "/app/src/server/services/progress_service.py", line 446, in complete_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found
+
+2026-03-11 15:15:46 [info ] Queue processing completed - all items processed
+
+ERROR: Task exception was never retrieved
+
+future: <Task finished name='Task-16313' coro=<DownloadService.\_process_queue() done, defined at /app/src/server/services/download_service.py:688> exception=ProgressServiceError("Progress with id 'download_queue' not found")>
+
+Traceback (most recent call last):
+
+File "/app/src/server/services/download_service.py", line 755, in \_process_queue
+
+    await self._progress_service.complete_progress(
+
+File "/app/src/server/services/progress_service.py", line 446, in complete_progress
+
+    raise ProgressServiceError(
+
+src.server.services.progress_service.ProgressServiceError: Progress with id 'download_queue' not found

src/server/services/download_service.py

@@ -395,6 +395,15 @@ class DownloadService:
             )
             self._queue_progress_initialized = True
         except Exception as e:
+            # If the entry already exists (e.g. from a concurrent task),
+            # treat that as success — the progress is usable.
+            from src.server.services.progress_service import ProgressServiceError
+            if isinstance(e, ProgressServiceError) and "already exists" in str(e):
+                logger.debug(
+                    "Queue progress already initialized by concurrent task"
+                )
+                self._queue_progress_initialized = True
+            else:
                 logger.error("Failed to initialize queue progress: %s", e)
 
     def _add_to_pending_queue(
@@ -759,8 +768,12 @@ class DownloadService:
                     "queue_status": queue_status.model_dump(mode="json")
                 },
             )
+            # Reset flag so next queue run re-creates the progress entry
+            self._queue_progress_initialized = False
         else:
             logger.info("Queue processing stopped by user")
+            # Reset flag so next queue run re-creates the progress entry
+            self._queue_progress_initialized = False
     
     async def start_next_download(self) -> Optional[str]:
         """Legacy method - redirects to start_queue_processing.
@@ -781,7 +794,8 @@ class DownloadService:
         self._is_stopped = True
         logger.info("Download processing stopped")
         
-        # Notify via progress service
+        # Notify via progress service (guard against entry not existing)
+        try:
             queue_status = await self.get_queue_status()
             await self._progress_service.update_progress(
                 progress_id="download_queue",
@@ -793,6 +807,8 @@ class DownloadService:
                 },
                 force_broadcast=True,
             )
+        except Exception as e:
+            logger.warning("Could not update queue progress on stop: %s", e)
 
     async def get_queue_status(self) -> QueueStatus:
         """Get current status of all queues.