fix: keep bypass/mute state on frontend 1.53+ node shell state (#1123)

ComfyUI frontend 1.53 turned LGraphNode.mode into a prototype accessor
backed by node._state, and serialize() now reads that state directly.
Redefining mode on the instance shadowed the setter, so bypass/mute
never reached the serialized workflow and silently reverted to Always
on save/reload or workflow tab switch.

Add interceptModeChange() in web/comfyui/utils.js: it delegates to the
prototype accessor when one exists (observing changes only), and falls
back to the legacy closure accessor on older frontends. Use it in
lora_loader.js and in the Vue widgets' setupModeChangeHandler, which
covers the LoRA provider/aggregator nodes with the same latent bug.

tests/frontend/components/loraLoader.triggerWords.test.js

@@ -50,6 +50,22 @@ vi.mock(UTILS_MODULE, () => ({
   chainCallback: (proto, property, callback) => {
     proto[property] = callback;
   },
+  interceptModeChange: (node, onModeChange) => {
+    let currentMode = node.mode;
+    Object.defineProperty(node, "mode", {
+      configurable: true,
+      get() {
+        return currentMode;
+      },
+      set(value) {
+        const oldValue = currentMode;
+        currentMode = value;
+        if (oldValue !== value) {
+          onModeChange(value, oldValue);
+        }
+      },
+    });
+  },
   getAllGraphNodes,
   getNodeFromGraph,
   getWidgetByName,