feat(lora): add mode change listeners to update trigger words

Add property descriptor to listen for mode changes in Lora Loader and Lora Stacker nodes. When node mode changes, automatically update connected trigger word toggle nodes and downstream loader nodes to maintain synchronization between node modes and trigger word states.

- Lora Loader: Updates connected trigger words when mode changes
- Lora Stacker: Updates connected trigger words and downstream loaders when mode changes
- Both nodes log mode changes for debugging purposes

web/comfyui/lora_stacker.js

@@ -29,6 +29,34 @@ app.registerExtension({
         let isUpdating = false;
         let isSyncingInput = false;
 
+        // Mechanism 3: Property descriptor to listen for mode changes
+        const self = this;
+        let _mode = this.mode;
+        Object.defineProperty(this, 'mode', {
+          get() {
+            return _mode;
+          },
+          set(value) {
+            const oldValue = _mode;
+            _mode = value;
+            
+            // Trigger mode change handler
+            if (self.onModeChange) {
+              self.onModeChange(value, oldValue);
+            }
+          }
+        });
+
+        // Define the mode change handler
+        this.onModeChange = function(newMode, oldMode) {
+          // Update connected trigger word toggle nodes and downstream loader trigger word toggle nodes
+          // when mode changes, similar to when loras change
+          const isNodeActive = newMode === 0 || newMode === 3; // Active when mode is Always (0) or On Trigger (3)
+          const activeLoraNames = isNodeActive ? getActiveLorasFromNode(self) : new Set();
+          updateConnectedTriggerWords(self, activeLoraNames);
+          updateDownstreamLoaders(self);
+        };
+
         const inputWidget = this.widgets[0];
         inputWidget.options.getMaxHeight = () => 100;
         this.inputWidget = inputWidget;