refactor(vue-widgets): adopt DOM widget value persistence best practices for randomizer and cycler

- Replace custom onSetValue with ComfyUI's built-in widget.callback
- Remove widget.updateConfig, set widget.value directly
- Add isRestoring flag to break callback → watch → widget.value loop
- Update ComponentWidget types with generic parameter for type-safe callbacks

Refs: docs/dom-widgets/value-persistence-best-practices.md

vue-widgets/src/main.ts

@@ -157,10 +157,8 @@ function createLoraRandomizerWidget(node) {
       },
       setValue(v: RandomizerConfig) {
         internalValue = v
-        console.log('randomizer widget value update: ', internalValue)
-        if (typeof widget.onSetValue === 'function') {
-          widget.onSetValue(v)
-        }
+        // ComfyUI automatically calls widget.callback after setValue
+        // No need for custom onSetValue mechanism
       },
       serialize: true,
       getMinHeight() {
@@ -169,10 +167,6 @@ function createLoraRandomizerWidget(node) {
     }
   )
 
-  widget.updateConfig = (v: RandomizerConfig) => {
-    internalValue = v
-  }
-
   // Add method to get pool config from connected node
   node.getPoolConfig = () => getPoolConfigFromConnectedNode(node)
 
@@ -242,9 +236,8 @@ function createLoraCyclerWidget(node) {
       setValue(v: CyclerConfig) {
         const oldFilename = internalValue?.current_lora_filename
         internalValue = v
-        if (typeof widget.onSetValue === 'function') {
-          widget.onSetValue(v)
-        }
+        // ComfyUI automatically calls widget.callback after setValue
+        // No need for custom onSetValue mechanism
         // Update downstream loaders when the active LoRA filename changes
         if (oldFilename !== v?.current_lora_filename) {
           updateDownstreamLoaders(node)
@@ -257,15 +250,6 @@ function createLoraCyclerWidget(node) {
     }
   )
 
-  widget.updateConfig = (v: CyclerConfig) => {
-    const oldFilename = internalValue?.current_lora_filename
-    internalValue = v
-    // Update downstream loaders when the active LoRA filename changes
-    if (oldFilename !== v?.current_lora_filename) {
-      updateDownstreamLoaders(node)
-    }
-  }
-
   // Add method to get pool config from connected node
   node.getPoolConfig = () => getPoolConfigFromConnectedNode(node)