Fix job cancellation cleanup

- Workers are freed immediately when jobs are cancelled
- Clean up active jobs in cluster master when cancelling processing jobs
- Remove unnecessary cleanup from restart (handled by cancel)

vidai/queue.py

@@ -72,12 +72,17 @@ class QueueManager:
         if job['status'] not in ['queued', 'processing']:
             return False
 
+        # If job was processing, clean up any active job for this queue_id
+        if job['status'] == 'processing':
+            from vidai.cluster_master import cluster_master
+            for job_id, job_info in cluster_master.active_jobs.items():
+                if job_info.get('queue_id') == queue_id:
+                    cluster_master.complete_job(job_id)
+                    break
+
         # Update status to cancelled
         update_queue_status(queue_id, 'cancelled')
 
-        # If job was processing, we might need to notify workers to stop
-        # For now, just mark as cancelled - workers should check status periodically
-
         return True
 
     def restart_job(self, queue_id: int, user_id: int = None) -> bool: