feat: 完成优化-4全部任务 + 多城市社保 + pgvector修复

- AIAssistant: 会话历史保存/加载/删除，风险预测支持范围筛选，审查结果保存到员工档案
- Dashboard: 待办批量操作，风险分布可下钻，刷新按钮Tab级联，薪税tab导出Excel
- SocialInsurance: 多城市社保/公积金配置支持，城市选择器
- Roster: 新增参保城市字段
- risk.service: 修复风险项去重逻辑(用employeeId:type:actionUrl替代含动态天数的title)
- payroll.routes: 修复OvertimeRecord/Payslip字段名错误
- pgvector: 从源码编译安装x86_64版本兼容postgresql@15
- 优化-4文档: 全部8项标记为已完成

backend/src/routes/dashboard.routes.ts

@@ -2,6 +2,7 @@ import { Router, Response, NextFunction } from 'express'
 import prisma from '../lib/prisma'
 import { authMiddleware, AuthRequest } from '../middleware/auth'
 import { getDashboardData } from '../services/risk.service'
+import { z } from 'zod'
 
 const router = Router()
 
@@ -46,4 +47,34 @@ router.patch('/todos/:id/ignore', authMiddleware, async (req: AuthRequest, res:
   }
 })
 
+// 批量标记待办为已完成
+router.patch('/todos/batch-resolve', authMiddleware, async (req: AuthRequest, res: Response, next: NextFunction) => {
+  try {
+    const schema = z.object({ ids: z.array(z.string()) })
+    const { ids } = schema.parse(req.body)
+    const result = await prisma.riskItem.updateMany({
+      where: { id: { in: ids }, orgId: req.user!.orgId, status: 'PENDING' },
+      data: { status: 'RESOLVED', resolvedAt: new Date(), resolvedBy: req.user!.id },
+    })
+    res.json({ success: true, data: { count: result.count } })
+  } catch (err) {
+    next(err)
+  }
+})
+
+// 批量忽略待办
+router.patch('/todos/batch-ignore', authMiddleware, async (req: AuthRequest, res: Response, next: NextFunction) => {
+  try {
+    const schema = z.object({ ids: z.array(z.string()) })
+    const { ids } = schema.parse(req.body)
+    const result = await prisma.riskItem.updateMany({
+      where: { id: { in: ids }, orgId: req.user!.orgId, status: 'PENDING' },
+      data: { status: 'IGNORED', resolvedAt: new Date(), resolvedBy: req.user!.id },
+    })
+    res.json({ success: true, data: { count: result.count } })
+  } catch (err) {
+    next(err)
+  }
+})
+
 export default router