Simplify delete_job error handling and remove flash messages

pdf_renamer.py

@@ -1477,8 +1477,7 @@ def delete_job(job_id):
                             except Exception as e:
                                 print(f"ERROR: Failed to delete archive: {e}", file=sys.stderr, flush=True)
                                 import traceback
-                                traceback.print_exc()
+                                traceback.print_exc(file=sys.stderr)
-                                flash('Job deleted but archive file could not be removed.', 'warning')
                         else:
                             print(f"DEBUG: ZIP file does not exist: {zip_path}", file=sys.stderr, flush=True)
                     
@@ -1497,24 +1496,27 @@ def delete_job(job_id):
                     del job_queue[job_id]
                     print(f"DEBUG: Saving jobs to disk", file=sys.stderr, flush=True)
                     save_jobs()  # Persist job deletion
-                    print(f"DEBUG: Job deletion complete, setting flash message", file=sys.stderr, flush=True)
+                    print(f"DEBUG: Job deletion complete", file=sys.stderr, flush=True)
-                    flash('Job deleted successfully.', 'success')
                 else:
                     print(f"DEBUG: Job status is not completed: {job.get('status')}", file=sys.stderr, flush=True)
-                    flash('Only completed jobs can be deleted.', 'error')
+                    return "Only completed jobs can be deleted", 400
             else:
                 print(f"DEBUG: Job not found in queue", file=sys.stderr, flush=True)
-                flash('Job not found.', 'error')
+                return "Job not found", 404
     except Exception as e:
         print(f"ERROR: Exception in delete_job: {e}", file=sys.stderr, flush=True)
         print(f"ERROR: Exception in delete_job: {e}", flush=True)
         import traceback
         traceback.print_exc(file=sys.stderr)
         traceback.print_exc()
-        flash(f'Error deleting job: {str(e)}', 'error')
+        return f"Error deleting job: {str(e)}", 500
     
     print(f"DEBUG: Redirecting to /jobs", file=sys.stderr, flush=True)
-    return redirect('/jobs')
+    try:
+        return redirect('/jobs')
+    except Exception as e:
+        print(f"ERROR: Redirect failed: {e}", file=sys.stderr, flush=True)
+        return "Job deleted but redirect failed", 200
 
 @app.route('/completed-jobs')
 @login_required