remove sweetalert2; add ui logic;

workflow_format.py

@@ -0,0 +1,17 @@
+from typing import Literal
+
+def adjust_workflow_format(workflow: dict) -> Literal['ui', 'api', 'invalid']:
+    """
+    Determine if workflow is UI or API format.
+    Args:
+        workflow (dict): workflow object
+    Returns:
+        Literal['ui', 'api', 'invalid']: 'ui' if UI format, 'api' if API format, 'invalid' if neither
+    """
+    if isinstance(workflow, dict):
+        if 'nodes' in workflow and isinstance(workflow['nodes'], list):
+            return 'ui'
+        # Heuristic: API format top-level keys are all digit strings
+        if all(isinstance(k, str) and k.isdigit() for k in workflow.keys()) and len(workflow) > 0:
+            return 'api'
+    return 'invalid'