fix: 待签合同列表中合同类型英文改为中文

LaborContract.contractType 枚举值（FIXED/UNFIXED/LABOR等）
转为中文显示（固定期限劳动合同/劳务协议等）。

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

backend/src/routes/esign.routes.ts

@@ -155,6 +155,16 @@ router.get('/pending', async (req: AuthRequest, res: Response, next: NextFunctio
     }
 
     // 汇总 LaborContract（排除已有 EsignRecord 关联的，避免重复）
+    const CONTRACT_TYPE_LABEL: Record<string, string> = {
+      FIXED: '固定期限劳动合同',
+      UNFIXED: '无固定期限劳动合同',
+      UNSIGNED: '未签合同',
+      LABOR: '劳务协议',
+      INTERNSHIP: '实习协议',
+      DISPATCH: '劳务派遣合同',
+      OUTSOURCING: '外包合同',
+      PARTTIME: '非全日制合同',
+    }
     const esignContractIds = new Set(pendingEsign.filter(r => r.contractId).map(r => r.contractId))
     for (const c of pendingContracts) {
       if (esignContractIds.has(c.id)) continue // 已有电子签署记录的不重复
@@ -163,7 +173,7 @@ router.get('/pending', async (req: AuthRequest, res: Response, next: NextFunctio
         type: 'contract',
         recordId: null,
         contractId: c.id,
-        title: `${c.contractType}合同`,
+        title: CONTRACT_TYPE_LABEL[c.contractType] || `${c.contractType}合同`,
         scene: 'CONTRACT',
         signMethod: c.signMethod,
         status: 'PENDING',