fix: 花名册合同风险统计与风险中心不一致

花名册快捷筛选标签基于当前页数据统计，改为后端返回全局RiskItem统计
- 后端roster API返回globalRiskStats(expiring/expired/unsigned)
- 前端优先使用全局统计，fallback到当前页统计

backend/src/routes/roster.routes.ts

@@ -210,6 +210,13 @@ router.get('/', authMiddleware, async (req: AuthRequest, res, next) => {
       result = result.slice(skip, skip + pageSize)
     }
 
+    // 全局合同风险统计（基于 RiskItem，与风险中心同口径）
+    const [globalExpiring, globalExpired, globalUnsigned] = await Promise.all([
+      prisma.riskItem.count({ where: { orgId: req.user!.orgId, status: 'PENDING', type: 'CONTRACT', level: 'MEDIUM' } }),
+      prisma.riskItem.count({ where: { orgId: req.user!.orgId, status: 'PENDING', type: 'CONTRACT', level: 'HIGH' } }),
+      prisma.riskItem.count({ where: { orgId: req.user!.orgId, status: 'PENDING', type: 'ONBOARDING' } }),
+    ])
+
     res.json({
       success: true,
       data: result,
@@ -219,6 +226,11 @@ router.get('/', authMiddleware, async (req: AuthRequest, res, next) => {
         total: filteredTotal,
         totalPages: Math.ceil(filteredTotal / pageSize),
       },
+      globalRiskStats: {
+        expiring: globalExpiring,
+        expired: globalExpired,
+        unsigned: globalUnsigned,
+      },
     })
   } catch (err) {
     next(err)

frontend/src/pages/Roster.tsx

@@ -235,14 +235,17 @@ export default function Roster() {
 
   const hasActiveFilters = search || filterStatus || filterContractStatus || filterDepartment
 
-  /** 计算合同风险统计（基于当前页数据） */
+  /** 全局合同风险统计（来自后端，与风险中心同口径） */
+  const globalRiskStats = rosterData?.globalRiskStats
   const riskStats = useMemo(() => {
+    if (globalRiskStats) return globalRiskStats
+    // fallback: 当前页统计
     const expiring = employees.filter((e: any) => e.contractStatus === 'expiring').length
     const expired = employees.filter((e: any) => e.contractStatus === 'expired').length
     const unsigned = employees.filter((e: any) => ['unsigned', 'unsigned_over_30', 'unsigned_over_year'].includes(e.contractStatus)).length
     const probation = employees.filter((e: any) => e.probationInfo?.isProbation && e.probationInfo?.isExpiring).length
     return { expiring, expired, unsigned, probation }
-  }, [employees])
+  }, [globalRiskStats, employees])
 
   /** 快捷筛选标签 */
   const quickFilters = [