Update app.py

app.py

@@ -1587,9 +1587,9 @@ if __name__ == "__main__":
     def load_templates(self):
         """Load all templates from directory"""
         try:
-        # Load built-in templates
-        self.templates.update(self._get_builtin_templates())
-        # Load custom templates
+            # Load built-in templates
+            self.templates.update(self._get_builtin_templates())
+            # Load custom templates
             for template_file in self.template_dir.glob("*.json"):
                 try:
                     with open(template_file, 'r', encoding='utf-8') as f: