Update app.py

app.py

@@ -475,6 +475,7 @@ class TemplateManager:
         
     def load_templates(self):
         """Load built-in templates"""
+        # Load built-in templates
         self.templates = {
         "image_classifier": Template(
             code="""
@@ -1484,10 +1485,10 @@ class TemplateManager:
         )
         }
                 
-        # Build indexes
+                # Build indexes after loading templates
         self._build_component_index()
         self._build_category_index()
-        
+    
     def _build_component_index(self):
         """Build index of templates by component"""
         self.component_index = {}
@@ -1496,7 +1497,7 @@ class TemplateManager:
                 if component not in self.component_index:
                     self.component_index[component] = []
                 self.component_index[component].append(name)
-                
+    
     def _build_category_index(self):
         """Build index of templates by category"""
         self.category_index = {}