Let me first read all the current files to understand the full codebase before making changes.

Now let me also check what other UI components are available:

Good, I have sonner (toast) and tooltip available. Let me also check the toast/sonner setup:

Now I have full context. The Sonner component needs a ThemeProvider. Let me check if that's set up, then I'll proceed with all the changes. Let me now implement everything:

1. Update layout to add Toaster
2. Redesign the main page (remove project table, keep header with management)
3. Fully functional user/unit/department management with all CRUD operations and feedback

Now let me rewrite the main page to remove the project table and redesign the layout:

Now let me rewrite the header with a cleaner design:

Now let me rewrite the user management with full CRUD functionality:

Now the unit management with full CRUD:

Now the department management with full CRUD:

Now update the management panel with a slightly improved design:

Now let me clean up the unused files (toolbar and project-table are no longer needed):

Let me verify the page renders correctly by reading the final page:

All files are in good shape. Here's a summary of the changes made:

主页重新设计：移除了项目列表（ProjectTable）和工具栏（Toolbar），替换为简洁的概览仪表板，包含欢迎区域、4 个统计卡片（项目总数、已完成、进行中、待处理风险）和 3 个系统管理快捷入口卡片。点击卡片或顶部「系统管理」菜单均可打开右侧 Sheet 面板。

三个管理模块全功能绑定：

• 用户管理：新增（含表单验证）、编辑（回填数据）、删除（AlertDialog 确认）、重置密码（确认弹窗+反馈）、启用/禁用状态切换（点击即切换+toast 提示）、搜索（带清除按钮）、所有按钮都有 Tooltip 提示。
• 单位管理：新增、编辑、查看详情（独立弹窗）、删除（有关联项目时会阻止并提示）、搜索，所有操作均有 toast 反馈。
• 部门管理：树形结构展示，支持展开/收起、搜索高亮过滤、新增子部门（可右键在任意节点下添加）、编辑、删除（有子部门时阻止删除），所有操作均有 toast 反馈。

Looking at the images:

• Image 1 (original): A project list table with columns for ID, unit name, contact person, security level, dates, completion %, system name, and filing number.
• Image 2 (new): A project detail page with a phase tab bar (准备阶段, 方案编制, etc.), a left sidebar with sections like 项目计划/测评目的和依据/基础信息采集, and a main content area showing forms with checkboxes for standards/regulations.

The user wants a flow: Dashboard -> Project List -> Project Detail. Let me read the current files first.

Now I have full context. Let me also check what UI components are available:

Good. I have progress, checkbox, scroll-area, badge, breadcrumb, and all the components I need. Now let me plan the implementation. The flow should be:

1. Dashboard (home page) - Stats cards are clickable to open the project list
2. Project List - Shows the table from image 1, each row clickable to enter project detail
3. Project Detail - Shows the phase tabs + sidebar + content from image 2

I'll implement this as a single-page app with view state management, keeping all existing management module functionality intact.

Now let me rewrite the main page to integrate all views:

Now let me also update the header to add a "项目列表" button that allows navigation from the header:

Now update the main page to pass the prop to AppHeader:

整个页面导航逻辑已经完成，现在有三层视图的完整流转：

1. 首页仪表板 -- 保留统计卡片和系统管理入口，所有统计卡片可点击，右上角新增了「项目列表」按钮，主区域还有一个醒目的「进入项目列表」按钮。
2. 项目列表 -- 点击任何统计卡片或项目列表按钮后进入，展示与原图一致的项目数据表格（编号、被测单位、等保等级、完成度进度条等），支持按对接人/等保等级筛选和搜索，带分页。点击任意行即可进入项目详情。
3. 项目详情 -- 对照第二张截图实现了完整的阶段 Tab 栏（准备阶段、方案编制、现场测评等 8 个阶段，含完成数/总数），可折叠的左侧导航栏（项目计划、基本情况调查等分组），以及右侧内容区（测评目的编辑、审核标准提示、测评依据复选框等），所有按钮均有交互反馈（toast 提示、状态切换）。头部「回到首页」可直接返回仪表板，侧栏支持展开/收起。