feat: 系统优化Phase2 - 面包屑导航/侧边栏间距/制度公示阅读签收/模板变量中文化/通知类型补全

- 面包屑导航组件，集成至TopNav header
- 侧边栏菜单分组间距增大，分组间分隔线
- 制度公示员工阅读签收：PolicyReadRecord模型、portal路由、管理端阅读统计
- 修复Policies.tsx民主程序推进bug（字段名/API路径/参数）
- 用工文本模板变量名英文转中文显示
- 通知类型TYPE_LABELS补全(RISK_ALERT/SOCIAL_INS/OVERTIME_ALERT/PAYSLIP_READY)
- 通知示例数据补充
- h2标题统一为text-sm font-medium
- 新增run.md

backend/src/routes/template.routes.ts

@@ -0,0 +1,45 @@
+import { Router, Response, NextFunction } from 'express'
+import { authMiddleware, AuthRequest } from '../middleware/auth'
+import { getAllTemplates, getTemplateById, getTemplatesByCategory, renderTemplate } from '../services/template.service'
+
+const router = Router()
+
+/** 获取所有模板列表 */
+router.get('/', authMiddleware, async (req: AuthRequest, res: Response, next: NextFunction) => {
+  try {
+    const category = req.query.category as string | undefined
+    const templates = category ? getTemplatesByCategory(category) : getAllTemplates()
+    res.json({ success: true, data: templates })
+  } catch (err) {
+    next(err)
+  }
+})
+
+/** 获取模板详情 */
+router.get('/:id', authMiddleware, async (req: AuthRequest, res: Response, next: NextFunction) => {
+  try {
+    const template = getTemplateById(req.params.id)
+    if (!template) {
+      return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '模板不存在' } })
+    }
+    res.json({ success: true, data: template })
+  } catch (err) {
+    next(err)
+  }
+})
+
+/** 渲染模板 */
+router.post('/:id/render', authMiddleware, async (req: AuthRequest, res: Response, next: NextFunction) => {
+  try {
+    const { variables } = req.body as { variables: Record<string, string> }
+    const content = renderTemplate(req.params.id, variables || {})
+    if (!content) {
+      return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '模板不存在' } })
+    }
+    res.json({ success: true, data: { content } })
+  } catch (err) {
+    next(err)
+  }
+})
+
+export default router