Add more logging to loadTemplateConfig() for debugging

web/overlay-controller.js

@@ -137,6 +137,7 @@ class WebOverlayController {
      * Load template configuration from API
      */
     async loadTemplateConfig() {
+        console.log('[OverlayController] loadTemplateConfig() called');
         try {
             console.log('[OverlayController] Loading template config...');
             const config = await this.apiRequest('/template-config');
@@ -166,6 +167,7 @@ class WebOverlayController {
             }
         } catch (error) {
             console.error('[OverlayController] Failed to load template config:', error);
+            console.error('[OverlayController] Error stack:', error.stack);
         }
     }