simplify route structure by moving AppLayout to root path

apps/jingrow/frontend/src/app/layouts/AppHeader.vue

@@ -125,7 +125,7 @@ const breadcrumbItems = computed(() => {
   if (route.meta?.toolName) {
     // 工具路由：显示 Tools / 工具名称
     // 自动解析 Tools 路由的路径（用于面包屑链接）
-    let toolsPath = '/app/tools' // 默认值
+    let toolsPath = '/tools'
     try {
       const resolved = router.resolve({ name: 'Tools' })
       if (resolved.matched.length > 0) {

apps/jingrow/frontend/src/app/router/index.ts

@@ -17,19 +17,19 @@ const router = createRouter({
       meta: { requiresAuth: false }
     },
     {
-      path: '/',
+      path: '',
       name: 'HomePage',
       component: () => import('../../views/HomePage.vue'),
       meta: { requiresAuth: false }
     },
     {
-      path: '/app',
+      path: '/',
       name: 'AppLayout',
       component: () => import('../layouts/AppLayout.vue'),
       meta: { requiresAuth: true },
       children: [
         {
-          path: '',
+          path: 'dashboard',
           name: 'Dashboard',
           component: () => import('../../views/Dashboard.vue')
         },