Fix attribute template column name: display_order -> sort_order

backend/db_manager.py

@@ -51,7 +51,7 @@ class AttributeTemplate:
     default_value: str = ""
     description: str = ""
     is_required: bool = False
-    display_order: int = 0
+    sort_order: int = 0
     created_at: str = ""
     updated_at: str = ""
     
@@ -655,12 +655,12 @@ class DatabaseManager:
         now = datetime.now().isoformat()
         conn.execute(
             """INSERT INTO attribute_templates 
-               (id, project_id, name, type, options, default_value, description, is_required, display_order, created_at, updated_at)
+               (id, project_id, name, type, options, default_value, description, is_required, sort_order, created_at, updated_at)
                VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)""",
             (template.id, template.project_id, template.name, template.type,
              json.dumps(template.options) if template.options else None,
              template.default_value, template.description, template.is_required,
-             template.display_order, now, now)
+             template.sort_order, now, now)
         )
         conn.commit()
         conn.close()
@@ -680,7 +680,7 @@ class DatabaseManager:
         conn = self.get_conn()
         rows = conn.execute(
             """SELECT * FROM attribute_templates WHERE project_id = ? 
-               ORDER BY display_order, created_at""",
+               ORDER BY sort_order, created_at""",
             (project_id,)
         ).fetchall()
         conn.close()
@@ -694,7 +694,7 @@ class DatabaseManager:
     
     def update_attribute_template(self, template_id: str, **kwargs) -> Optional[AttributeTemplate]:
         conn = self.get_conn()
-        allowed_fields = ['name', 'type', 'options', 'default_value', 'description', 'is_required', 'display_order']
+        allowed_fields = ['name', 'type', 'options', 'default_value', 'description', 'is_required', 'sort_order']
         updates = []
         values = []