security(api): fix privilege escalation vulnerability in model config and chat message APIs (#25518)

The `ChatMessageApi` (`POST /console/api/apps/{app_id}/chat-messages`) and 
`ModelConfigResource` (`POST /console/api/apps/{app_id}/model-config`) 
endpoints do not properly validate user permissions, allowing users without `editor` 
permission to access restricted functionality.

This PR addresses this issue by adding proper permission check.

api/controllers/console/app/workflow_draft_variable.py

@@ -137,7 +137,7 @@ def _api_prerequisite(f):
     @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
     def wrapper(*args, **kwargs):
         assert isinstance(current_user, Account)
-        if not current_user.is_editor:
+        if not current_user.has_edit_permission:
             raise Forbidden()
         return f(*args, **kwargs)