[feat] fully replicate LiteGraph drawNode color logic in Vue nodes

Now correctly implements all aspects of the LiteGraph drawNode monkey patch:

1. Header colors: Apply opacity + lightness adjustments like LiteGraph
2. Body colors: Apply same adjustments to background as LiteGraph
3. Opacity setting: Support 'Comfy.Node.Opacity' setting from user preferences
4. Light theme: Apply lightness=0.5 to both header and body in light theme

This ensures Vue nodes have pixel-perfect color matching with LiteGraph nodes
across all themes and opacity settings.

src/renderer/extensions/vueNodes/components/LGraphNode.vue

@@ -35,7 +35,7 @@
       {
         transform: `translate(${position.x ?? 0}px, ${(position.y ?? 0) - LiteGraph.NODE_TITLE_HEIGHT}px)`,
         zIndex: zIndex,
-        backgroundColor: nodeData.bgcolor || ''
+        backgroundColor: nodeBodyBackgroundColor
       },
       dragStyle
     ]"
@@ -145,6 +145,7 @@ import type { VueNodeData } from '@/composables/graph/useGraphNodeManager'
 import { toggleNodeOptions } from '@/composables/graph/useMoreOptionsMenu'
 import { useErrorHandling } from '@/composables/useErrorHandling'
 import { LiteGraph } from '@/lib/litegraph/src/litegraph'
+import { useSettingStore } from '@/platform/settings/settingStore'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCanvasInteractions } from '@/renderer/core/canvas/useCanvasInteractions'
 import { TransformStateKey } from '@/renderer/core/layout/injectionKeys'
@@ -157,6 +158,8 @@ import { useNodePreviewState } from '@/renderer/extensions/vueNodes/preview/useN
 import { app } from '@/scripts/app'
 import { useExecutionStore } from '@/stores/executionStore'
 import { useNodeOutputStore } from '@/stores/imagePreviewStore'
+import { useColorPaletteStore } from '@/stores/workspace/colorPaletteStore'
+import { adjustColor } from '@/utils/colorUtil'
 import {
   getLocatorIdFromNodeData,
   getNodeByLocatorId
@@ -227,6 +230,37 @@ const hasAnyError = computed((): boolean => {
 const bypassed = computed((): boolean => nodeData.mode === 4)
 const muted = computed((): boolean => nodeData.mode === 2) // NEVER mode
 
+// Node body background color that exactly replicates LiteGraph's drawNode logic
+const nodeBodyBackgroundColor = computed(() => {
+  const colorPaletteStore = useColorPaletteStore()
+  const settingStore = useSettingStore()
+
+  // This replicates the drawNode logic for bgColor
+  let bgColor = nodeData.bgcolor || '' // matches: old_bgcolor || LiteGraph.NODE_DEFAULT_BGCOLOR
+
+  if (!bgColor) return '' // No color to adjust
+
+  // Apply the exact same adjustments as the drawNode monkey patch
+  const adjustments: { lightness?: number; opacity?: number } = {}
+
+  // 1. Apply opacity setting (same as drawNode)
+  const opacity = settingStore.get('Comfy.Node.Opacity')
+  if (opacity) adjustments.opacity = opacity
+
+  // 2. Apply light theme background lightening (same as drawNode)
+  if (colorPaletteStore.completedActivePalette.light_theme) {
+    // This matches: "if (old_bgcolor) adjustments.lightness = 0.5"
+    adjustments.lightness = 0.5
+  }
+
+  // Apply all adjustments at once: node.bgcolor = adjustColor(bgColor, adjustments)
+  if (Object.keys(adjustments).length > 0) {
+    bgColor = adjustColor(bgColor, adjustments)
+  }
+
+  return bgColor
+})
+
 // Use canvas interactions for proper wheel event handling and pointer event capture control
 const { handleWheel, shouldHandleNodePointerEvents } = useCanvasInteractions()
 

src/renderer/extensions/vueNodes/components/NodeHeader.vue

@@ -72,6 +72,7 @@ import EditableText from '@/components/common/EditableText.vue'
 import type { VueNodeData } from '@/composables/graph/useGraphNodeManager'
 import { useErrorHandling } from '@/composables/useErrorHandling'
 import { st } from '@/i18n'
+import { useSettingStore } from '@/platform/settings/settingStore'
 import { useNodeTooltips } from '@/renderer/extensions/vueNodes/composables/useNodeTooltips'
 import { app } from '@/scripts/app'
 import { useColorPaletteStore } from '@/stores/workspace/colorPaletteStore'
@@ -126,25 +127,34 @@ const tooltipConfig = computed(() => {
   return createTooltipConfig(description)
 })
 
-// Header style that replicates LiteGraph's ColorOption and drawNode logic
+// Header style that exactly replicates LiteGraph's drawNode monkey patch logic
 const headerStyle = computed(() => {
   if (!nodeData?.color) {
     return { backgroundColor: '' } // Explicitly clear background color
   }
 
   const colorPaletteStore = useColorPaletteStore()
+  const settingStore = useSettingStore()
+
+  // Start with the original color (same as old_color in drawNode)
   let headerColor = nodeData.color
 
-  // Apply base header darkening to replicate LiteGraph's ColorOption system
-  // When header and body colors are the same/similar, darken the header
-  if (nodeData.bgcolor && nodeData.color === nodeData.bgcolor) {
-    // Darken header relative to body (opposite of light theme adjustment)
-    headerColor = adjustColor(nodeData.color, { lightness: -0.15 })
+  // Apply the exact same adjustments as the drawNode monkey patch
+  const adjustments: { lightness?: number; opacity?: number } = {}
+
+  // 1. Apply opacity setting (same as drawNode)
+  const opacity = settingStore.get('Comfy.Node.Opacity')
+  if (opacity) adjustments.opacity = opacity
+
+  // 2. Apply light theme adjustments (same as drawNode)
+  if (colorPaletteStore.completedActivePalette.light_theme) {
+    // This matches: "if (old_color) { node.color = adjustColor(old_color, { lightness: 0.5 }) }"
+    adjustments.lightness = 0.5
   }
 
-  // Apply light theme lightening on top of base darkening (same as drawNode monkey patch)
-  if (colorPaletteStore.completedActivePalette.light_theme) {
-    headerColor = adjustColor(headerColor, { lightness: 0.5 })
+  // Apply all adjustments at once (matching drawNode's approach)
+  if (Object.keys(adjustments).length > 0) {
+    headerColor = adjustColor(headerColor, adjustments)
   }
 
   return { backgroundColor: headerColor }