refactor: remove old demo pages and static menu logic

1. 删除大量旧的示例页面、组件示例和静态菜单配置
2. 新增菜单扁平数组转树形结构工具函数
3. 重构菜单加载逻辑，改为从后端动态获取并格式化
4. 新增全局权限检查方法和自定义权限指令
5. 优化侧边栏菜单路由跳转逻辑，自动跳转第一个有权限的子页面
6. 移除路由中对旧demo模块的引用

src/store/modules/d2admin/modules/menu.js

@@ -1,5 +1,7 @@
-// 设置文件
 import setting from '@/setting.js'
+import util from '@/libs/util'
+import menu from '@/menu'
+import { getMenuAll } from '@/api/menu'
 
 export default {
   namespaced: true,
@@ -12,19 +14,14 @@ export default {
     asideCollapse: setting.menu.asideCollapse,
     // 侧边栏折叠动画
     asideTransition: setting.menu.asideTransition,
+    // 权限字典 { '/path': '菜单名' }
+    authKey: {},
     // 菜单源数据
     sourceData: []
   },
   actions: {
-    /**
-     * 设置侧边栏展开或者收缩
-     * @param {Object} context
-     * @param {Boolean} collapse is collapse
-     */
     async asideCollapseSet ({ state, dispatch }, collapse) {
-      // store 赋值
       state.asideCollapse = collapse
-      // 持久化
       await dispatch('d2admin/db/set', {
         dbName: 'sys',
         path: 'menu.asideCollapse',
@@ -32,14 +29,8 @@ export default {
         user: true
       }, { root: true })
     },
-    /**
-     * 切换侧边栏展开和收缩
-     * @param {Object} context
-     */
     async asideCollapseToggle ({ state, dispatch }) {
-      // store 赋值
       state.asideCollapse = !state.asideCollapse
-      // 持久化
       await dispatch('d2admin/db/set', {
         dbName: 'sys',
         path: 'menu.asideCollapse',
@@ -47,15 +38,8 @@ export default {
         user: true
       }, { root: true })
     },
-    /**
-     * 设置侧边栏折叠动画
-     * @param {Object} context
-     * @param {Boolean} transition is transition
-     */
     async asideTransitionSet ({ state, dispatch }, transition) {
-      // store 赋值
       state.asideTransition = transition
-      // 持久化
       await dispatch('d2admin/db/set', {
         dbName: 'sys',
         path: 'menu.asideTransition',
@@ -63,14 +47,8 @@ export default {
         user: true
       }, { root: true })
     },
-    /**
-     * 切换侧边栏折叠动画
-     * @param {Object} context
-     */
     async asideTransitionToggle ({ state, dispatch }) {
-      // store 赋值
       state.asideTransition = !state.asideTransition
-      // 持久化
       await dispatch('d2admin/db/set', {
         dbName: 'sys',
         path: 'menu.asideTransition',
@@ -78,52 +56,58 @@ export default {
         user: true
       }, { root: true })
     },
-    /**
-     * 持久化数据加载侧边栏设置
-     * @param {Object} context
-     */
     async asideLoad ({ state, dispatch }) {
-      // store 赋值
-      const menu = await dispatch('d2admin/db/get', {
+      const menuSetting = await dispatch('d2admin/db/get', {
         dbName: 'sys',
         path: 'menu',
         defaultValue: setting.menu,
         user: true
       }, { root: true })
-      state.asideCollapse = menu.asideCollapse !== undefined ? menu.asideCollapse : setting.menu.asideCollapse
-      state.asideTransition = menu.asideTransition !== undefined ? menu.asideTransition : setting.menu.asideTransition
+      state.asideCollapse = menuSetting.asideCollapse !== undefined ? menuSetting.asideCollapse : setting.menu.asideCollapse
+      state.asideTransition = menuSetting.asideTransition !== undefined ? menuSetting.asideTransition : setting.menu.asideTransition
     },
-    /**
-     * 持久化数据加载菜单源数据
-     * @param {Object} context
-     */
-    async sourceDataLoad ({ state, dispatch }) {
-      const sourceData = await dispatch('d2admin/db/get', {
+    async sourceDataLoad ({ state, commit, dispatch }) {
+      // 优先从 localStorage 读取上次缓存的菜单数据
+      state.sourceData = await dispatch('d2admin/db/get', {
         dbName: 'database',
         path: '$menu.sourceData',
         defaultValue: [],
         user: true
       }, { root: true })
-      state.sourceData = sourceData
+
+      // 缓存为空且已登录时，从后端获取菜单
+      if (!state.sourceData.length && util.cookies.get('token')) {
+        const res = await getMenuAll()
+        state.sourceData = res || []
+        await dispatch('d2admin/db/set', {
+          dbName: 'database',
+          path: '$menu.sourceData',
+          value: state.sourceData,
+          user: true
+        }, { root: true })
+      }
+
+      // 构建菜单树和权限字典
+      menu.install(this, state.sourceData)
     }
   },
   mutations: {
-    /**
-     * @description 设置顶栏菜单
-     * @param {Object} state state
-     * @param {Array} menu menu setting
-     */
+    headerAuth (state, source) {
+      if (!source || source.length <= 0) {
+        return
+      }
+      const auth = {}
+      source.forEach(value => {
+        if (value.url) {
+          auth[value.url] = value.name
+        }
+      })
+      state.authKey = auth
+    },
     headerSet (state, menu) {
-      // store 赋值
       state.header = menu
     },
-    /**
-     * @description 设置侧边栏菜单
-     * @param {Object} state state
-     * @param {Array} menu menu setting
-     */
     asideSet (state, menu) {
-      // store 赋值
       state.aside = menu
     }
   }