feat(recycle-bin): 实现回收站功能

- 新增回收站相关 API 接口
- 添加回收站页面组件和路由
- 实现笔记和分类的软删除功能
- 支持回收站内容的获取、恢复和永久删除操作
- 优化用户界面，增加回收站入口和相关提示

biji-qianduan/src/router/index.js

@@ -3,6 +3,7 @@ import HomePage from '../components/HomePage.vue';
 import MarkdownEditor from '../components/MarkdownEditor.vue';
 import LoginPage from '../components/LoginPage.vue';
 import RegisterPage from '../components/RegisterPage.vue';
+import TrashPage from '../components/TrashPage.vue';
 
 const routes = [
   {
@@ -34,6 +35,11 @@ const routes = [
     path: '/register',
     name: 'Register',
     component: RegisterPage
+  },
+  {
+    path: '/trash',
+    name: 'Trash',
+    component: TrashPage
   }
 ];