fix: 薪资批次排除预入职员工（hireDate > 批次月末）

原查询只过滤status=ACTIVE，预入职员工status也是ACTIVE会被错误纳入。
增加hireDate <= monthEnd条件，确保只拉入已入职员工。

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

frontend/src/pages/money/BatchTab.tsx

@@ -1174,6 +1174,7 @@ function BatchDetail({ batchId, onBack }: { batchId: string; onBack: () => void
             <thead>
               <tr className="border-b text-left text-xs text-gray-500">
                 <th className="py-2 px-2">员工</th>
+                <th className="py-2 px-2">合同类型</th>
                 <th className="py-2 px-2 text-right">基本工资</th>
                 <th className="py-2 px-2 text-right">加班费</th>
                 <th className="py-2 px-2 text-right">津贴</th>
@@ -1203,6 +1204,29 @@ function BatchDetail({ batchId, onBack }: { batchId: string; onBack: () => void
                       )}
                     </div>
                   </td>
+                  <td className="py-2 px-2">
+                    {(() => {
+                      const ct = entry.employee.contracts?.[0]?.contractType
+                      const cfg: Record<string, { label: string; style: string }> = {
+                        FIXED: { label: '固定期限', style: 'bg-blue-50 text-blue-700' },
+                        UNFIXED: { label: '无固定期', style: 'bg-purple-50 text-purple-700' },
+                        LABOR: { label: '劳务协议', style: 'bg-amber-50 text-amber-700' },
+                        INTERNSHIP: { label: '实习协议', style: 'bg-teal-50 text-teal-700' },
+                        PARTTIME: { label: '兼职协议', style: 'bg-cyan-50 text-cyan-700' },
+                        OUTSOURCING: { label: '业务外包', style: 'bg-slate-50 text-slate-700' },
+                        DISPATCH: { label: '劳务派遣', style: 'bg-cyan-50 text-cyan-700' },
+                        UNSIGNED: { label: '未签合同', style: 'bg-red-50 text-danger' },
+                      }
+                      const c = cfg[ct || ''] || { label: '未签合同', style: 'bg-red-50 text-danger' }
+                      const noSocial = ct && ['LABOR', 'INTERNSHIP', 'PARTTIME', 'OUTSOURCING', 'UNSIGNED'].includes(ct)
+                      return (
+                        <div className="flex flex-col gap-0.5">
+                          <span className={`px-1.5 py-0.5 rounded text-[11px] ${c.style}`}>{c.label}</span>
+                          {noSocial && <span className="text-[10px] text-gray-400">不缴社保</span>}
+                        </div>
+                      )
+                    })()}
+                  </td>
                   {renderCell(entry, 'baseSalary')}
                   {renderCell(entry, 'overtimePay')}
                   {renderCell(entry, 'allowance')}