优化：目录状态做成全局状态

src/stores/menu.ts

@@ -0,0 +1,44 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import type { CategoryTreeNode } from '@/api/category'
+
+export const useMenuStore = defineStore('menu', () => {
+  /** 分类树（顶层） */
+  const categoryTree = ref<CategoryTreeNode[]>([])
+  
+  /** 每层选中的 id，[layer0, layer1?, layer2?] */
+  const layerActiveValues = ref<string[]>([])
+
+  /** 过滤：仅当 forceShow 明确为 false 时不显示，其他（null/undefined/true 等）均显示；排除 forceHide 的节点 */
+  function filterVisible(nodes: CategoryTreeNode[] | undefined): CategoryTreeNode[] {
+    if (!nodes?.length) return []
+    return nodes.filter((n) => n.forceShow !== false && !n.forceHide)
+  }
+
+  /** 当前展示的层级数据：[[layer0], [layer1]?, [layer2]?] */
+  const categoryLayers = computed(() => {
+    const root = filterVisible(categoryTree.value)
+    if (root.length === 0) return []
+
+    const layers: CategoryTreeNode[][] = [root]
+    const active = layerActiveValues.value
+
+    let currentNodes = root
+    for (let i = 0; i < 2; i++) {
+      const selectedId = active[i]
+      const node = selectedId ? currentNodes.find((n) => n.id === selectedId) : currentNodes[0]
+      const children = filterVisible(node?.children)
+      if (children.length === 0) break
+      layers.push(children)
+      currentNodes = children
+    }
+    return layers
+  })
+
+  return {
+    categoryTree,
+    layerActiveValues,
+    categoryLayers,
+    filterVisible
+  }
+})

src/views/Home.vue

@@ -155,13 +155,14 @@ import {
   enrichWithIcons,
   getPmTagMain,
   MOCK_CATEGORY_TREE,
-  type CategoryTreeNode,
 } from '../api/category'
 import { USE_MOCK_CATEGORY } from '../config/mock'
 import { useI18n } from 'vue-i18n'
 import { useSearchHistory } from '../composables/useSearchHistory'
 import { useToastStore } from '../stores/toast'
 import { useLocaleStore } from '../stores/locale'
+import { useMenuStore } from '../stores/menu'
+import { storeToRefs } from 'pinia'
 
 const { mobile } = useDisplay()
 const { t } = useI18n()
@@ -169,10 +170,10 @@ const searchHistory = useSearchHistory()
 const searchHistoryList = computed(() => searchHistory.list.value)
 const isMobile = computed(() => mobile.value)
 
-/** 分类树（顶层） */
-const categoryTree = ref<CategoryTreeNode[]>([])
-/** 每层选中的 id，[layer0, layer1?, layer2?] */
-const layerActiveValues = ref<string[]>([])
+const menuStore = useMenuStore()
+const { categoryTree, layerActiveValues, categoryLayers } = storeToRefs(menuStore)
+const { filterVisible } = menuStore
+
 /** 第三层搜索框是否展开 */
 const searchExpanded = ref(false)
 /** 搜索关键词 */
@@ -225,12 +226,6 @@ function doSearch(keyword: string) {
   loadEvents(1, false, keyword)
 }
 
-/** 过滤：仅当 forceShow 明确为 false 时不显示，其他（null/undefined/true 等）均显示；排除 forceHide 的节点 */
-function filterVisible(nodes: CategoryTreeNode[] | undefined): CategoryTreeNode[] {
-  if (!nodes?.length) return []
-  return nodes.filter((n) => n.forceShow !== false && !n.forceHide)
-}
-
 /** 当前选中分类的 tagIds：收集所有选中层级节点的 tagId 数组（含父级），用于事件筛选 */
 const activeTagIds = computed(() => {
   const activeIds = layerActiveValues.value
@@ -255,26 +250,6 @@ const activeTagIds = computed(() => {
   return Array.from(tagIdSet)
 })
 
-/** 当前展示的层级数据：[[layer0], [layer1]?, [layer2]?] */
-const categoryLayers = computed(() => {
-  const root = filterVisible(categoryTree.value)
-  if (root.length === 0) return []
-
-  const layers: CategoryTreeNode[][] = [root]
-  const active = layerActiveValues.value
-
-  let currentNodes = root
-  for (let i = 0; i < 2; i++) {
-    const selectedId = active[i]
-    const node = selectedId ? currentNodes.find((n) => n.id === selectedId) : currentNodes[0]
-    const children = filterVisible(node?.children)
-    if (children.length === 0) break
-    layers.push(children)
-    currentNodes = children
-  }
-  return layers
-})
-
 /** 分类选中时：若有 children 则展开下一层并默认选中第一个，并重新加载列表 */
 function onCategorySelect(layerIndex: number, selectedId: string) {
   if (!selectedId || layerActiveValues.value[layerIndex] === selectedId) {