Implement AJAX job actions for Jobs page

- Replace form submissions with AJAX calls for cancel/restart/delete
- Remove confirm alerts and page redirects
- Add success/error notifications for actions
- Initialize job actions on page load
- Update backend routes to handle AJAX requests with JSON responses
- Maintain real-time status updates via polling

vidai/web.py

@@ -402,8 +402,14 @@ def delete_job(job_id):
     from .queue import queue_manager
 
     if queue_manager.delete_job(job_id, user['id']):
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': True, 'message': 'Job deleted successfully!'}
         flash('Job deleted successfully!', 'success')
     else:
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': False, 'message': 'Failed to delete job or access denied.'}, 400
         flash('Failed to delete job or access denied.', 'error')
 
     return redirect(url_for('history'))
@@ -417,8 +423,14 @@ def cancel_job(job_id):
     from .queue import queue_manager
 
     if queue_manager.cancel_job(job_id, user['id']):
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': True, 'message': 'Job cancelled successfully!'}
         flash('Job cancelled successfully!', 'success')
     else:
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': False, 'message': 'Failed to cancel job or access denied.'}, 400
         flash('Failed to cancel job or access denied.', 'error')
 
     return redirect(url_for('history'))
@@ -432,8 +444,14 @@ def restart_job(job_id):
     from .queue import queue_manager
 
     if queue_manager.restart_job(job_id, user['id']):
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': True, 'message': 'Job restarted successfully!'}
         flash('Job restarted successfully!', 'success')
     else:
+        # Check if this is an AJAX request
+        if request.headers.get('Content-Type') == 'application/x-www-form-urlencoded' and request.headers.get('X-Requested-With') == 'XMLHttpRequest':
+            return {'success': False, 'message': 'Failed to restart job or access denied.'}, 400
         flash('Failed to restart job or access denied.', 'error')
 
     return redirect(url_for('history'))