修改节点样式

Web/Vue/CubeLib/src/components/CubeTreeItem.vue

@@ -138,14 +138,13 @@ const computedIcon = computed(() => {
     
     return effectiveIconMap.default || '📄'
   } else if (iconType === 'heading') {
-    const effectiveIconMap = userIconMap || defaultHeadingIconMap
-    const level = props.item.level
-    
-    if (level && effectiveIconMap[level]) {
-      return effectiveIconMap[level]
+    if (hasChildren.value) {
+      if (props.item.level === 1) {
+        return '📚'
+      }
+      return '📖'
     }
-    
-    return effectiveIconMap.default || '📄'
+    return '📄'
   }
   
   return hasChildren.value ? '📁' : '📄'