refactor(guide): 重构教程页面为管理员视角

- 重新规划教程结构：概览、供应商管理、模型管理、用户与密钥、高级功能、常见问题
- 新增详细的功能解释和配置说明
- 删除旧的 CLI/SDK 用户指南页面
- 修复路由配置，添加 meta.requiresAuth: false

frontend/src/router/index.ts

@@ -15,9 +15,46 @@ const routes: RouteRecordRaw[] = [
 
   {
     path: '/guide',
-    name: 'Guide',
-    component: () => importWithRetry(() => import('@/views/public/Guide.vue')),
-    meta: { requiresAuth: false }
+    component: () => importWithRetry(() => import('@/views/public/guide/GuideLayout.vue')),
+    meta: { requiresAuth: false },
+    children: [
+      {
+        path: '',
+        name: 'GuideOverview',
+        component: () => importWithRetry(() => import('@/views/public/guide/Overview.vue')),
+        meta: { requiresAuth: false }
+      },
+      {
+        path: 'provider',
+        name: 'GuideProvider',
+        component: () => importWithRetry(() => import('@/views/public/guide/ProviderGuide.vue')),
+        meta: { requiresAuth: false }
+      },
+      {
+        path: 'model',
+        name: 'GuideModel',
+        component: () => importWithRetry(() => import('@/views/public/guide/ModelGuide.vue')),
+        meta: { requiresAuth: false }
+      },
+      {
+        path: 'user-key',
+        name: 'GuideUserKey',
+        component: () => importWithRetry(() => import('@/views/public/guide/UserKeyGuide.vue')),
+        meta: { requiresAuth: false }
+      },
+      {
+        path: 'advanced',
+        name: 'GuideAdvanced',
+        component: () => importWithRetry(() => import('@/views/public/guide/AdvancedGuide.vue')),
+        meta: { requiresAuth: false }
+      },
+      {
+        path: 'faq',
+        name: 'GuideFaq',
+        component: () => importWithRetry(() => import('@/views/public/guide/GuideFaq.vue')),
+        meta: { requiresAuth: false }
+      }
+    ]
   },
   {
     path: '/logo-demo',