feat: P4 dataSource 字段 + overtimePay 修复 + 获取按钮动态化

- schema: PayslipItem 增加 dataSource 字段标记数据来源
- DEFAULT_ITEMS: overtimePay 从 CALCULATED 改为 INPUT（修复被重算覆盖为0的bug）
- DEFAULT_ITEMS: performanceSalary/bonus/deduction 标记 dataSource
- 迁移逻辑: 已有组织自动补充 dataSource + 修正 overtimePay 类型
- 后端模板 CRUD 支持 dataSource 字段
- 前端模板编辑器增加数据来源下拉选择
- 前端模板表格增加数据来源列
- 前端批次详情'获取'按钮根据模板 dataSource 动态显示

frontend/src/pages/money/BatchTab.tsx

@@ -897,55 +897,66 @@ function BatchDetail({ batchId, onBack }: { batchId: string; onBack: () => void
             >
               <Download className="w-4 h-4 mr-1" />下载模板
             </Button>
-            <Button
-              variant="secondary"
-              size="sm"
-              onClick={() => importOvertimeMutation.mutate(undefined)}
-              disabled={importOvertimeMutation.isPending}
-            >
-              <Calculator className="w-4 h-4 mr-1" />
-              {importOvertimeMutation.isPending ? '获取中...' : '获取加班费'}
-            </Button>
-            <Button
-              variant="secondary"
-              size="sm"
-              onClick={() => fetchBonusMutation.mutate(undefined)}
-              disabled={fetchBonusMutation.isPending || isArchived}
-              title="从提成奖金模块按月拉取填充奖金字段"
-            >
-              <DollarSign className="w-4 h-4 mr-1" />
-              {fetchBonusMutation.isPending ? '获取中...' : '获取提成奖金'}
-            </Button>
-            <Button
-              variant="secondary"
-              size="sm"
-              onClick={() => fetchPerformanceMutation.mutate(undefined)}
-              disabled={fetchPerformanceMutation.isPending || isArchived}
-              title="按考核等级系数计算绩效工资（A=1.2/B=1.0/C=0.8/D=0.6），无考核记录按1.0"
-            >
-              <TrendingUp className="w-4 h-4 mr-1" />
-              {fetchPerformanceMutation.isPending ? '获取中...' : '获取绩效工资'}
-            </Button>
-            <Button
-              variant="secondary"
-              size="sm"
-              onClick={() => fetchDisciplinaryMutation.mutate(undefined)}
-              disabled={fetchDisciplinaryMutation.isPending || isArchived}
-              title="按批次月份从违纪记录中汇总扣款金额（action=DEDUCTION）"
-            >
-              <AlertTriangle className="w-4 h-4 mr-1" />
-              {fetchDisciplinaryMutation.isPending ? '获取中...' : '获取违纪扣款'}
-            </Button>
-            <Button
-              variant="secondary"
-              size="sm"
-              onClick={() => fetchAttendanceDeductionMutation.mutate(undefined)}
-              disabled={fetchAttendanceDeductionMutation.isPending || isArchived}
-              title="按批次月份从考勤确认中获取扣款金额（需先在考勤确认中填写）"
-            >
-              <CalendarCheck className="w-4 h-4 mr-1" />
-              {fetchAttendanceDeductionMutation.isPending ? '获取中...' : '获取考勤扣款'}
-            </Button>
+            {/* 根据模板 dataSource 动态显示获取按钮 */}
+            {(templateItems || []).some((t: any) => t.dataSource === 'overtime') && (
+              <Button
+                variant="secondary"
+                size="sm"
+                onClick={() => importOvertimeMutation.mutate(undefined)}
+                disabled={importOvertimeMutation.isPending}
+              >
+                <Calculator className="w-4 h-4 mr-1" />
+                {importOvertimeMutation.isPending ? '获取中...' : '获取加班费'}
+              </Button>
+            )}
+            {(templateItems || []).some((t: any) => t.dataSource === 'bonus') && (
+              <Button
+                variant="secondary"
+                size="sm"
+                onClick={() => fetchBonusMutation.mutate(undefined)}
+                disabled={fetchBonusMutation.isPending || isArchived}
+                title="从提成奖金模块按月拉取填充奖金字段"
+              >
+                <DollarSign className="w-4 h-4 mr-1" />
+                {fetchBonusMutation.isPending ? '获取中...' : '获取提成奖金'}
+              </Button>
+            )}
+            {(templateItems || []).some((t: any) => t.dataSource === 'performance') && (
+              <Button
+                variant="secondary"
+                size="sm"
+                onClick={() => fetchPerformanceMutation.mutate(undefined)}
+                disabled={fetchPerformanceMutation.isPending || isArchived}
+                title="按考核等级系数计算绩效工资（A=1.2/B=1.0/C=0.8/D=0.6），无考核记录按1.0"
+              >
+                <TrendingUp className="w-4 h-4 mr-1" />
+                {fetchPerformanceMutation.isPending ? '获取中...' : '获取绩效工资'}
+              </Button>
+            )}
+            {(templateItems || []).some((t: any) => t.dataSource === 'deduction') && (
+              <>
+                <Button
+                  variant="secondary"
+                  size="sm"
+                  onClick={() => fetchDisciplinaryMutation.mutate(undefined)}
+                  disabled={fetchDisciplinaryMutation.isPending || isArchived}
+                  title="按批次月份从违纪记录中汇总扣款金额（action=DEDUCTION）"
+                >
+                  <AlertTriangle className="w-4 h-4 mr-1" />
+                  {fetchDisciplinaryMutation.isPending ? '获取中...' : '获取违纪扣款'}
+                </Button>
+                <Button
+                  variant="secondary"
+                  size="sm"
+                  onClick={() => fetchAttendanceDeductionMutation.mutate(undefined)}
+                  disabled={fetchAttendanceDeductionMutation.isPending || isArchived}
+                  title="按批次月份从考勤确认中获取扣款金额（需先在考勤确认中填写）"
+                >
+                  <CalendarCheck className="w-4 h-4 mr-1" />
+                  {fetchAttendanceDeductionMutation.isPending ? '获取中...' : '获取考勤扣款'}
+                </Button>
+              </>
+            )}
             <Button
               size="sm"
               onClick={async () => {

frontend/src/pages/money/TemplateTab.tsx

@@ -9,6 +9,14 @@ import Card from '../../components/ui/Card'
 import Button from '../../components/ui/Button'
 import { Input, Label, Select } from '../../components/ui/Input'
 import Modal from '../../components/ui/Modal'
+
+const DATA_SOURCE_LABELS: Record<string, string> = {
+  overtime: '加班记录',
+  performance: '绩效记录',
+  bonus: '奖金记录',
+  deduction: '扣款记录',
+}
+
 // 金额格式化：保留两位小数 + 千分位
 
 // ========== 薪酬模版管理 ==========
@@ -24,6 +32,7 @@ export function TemplateManager() {
     type: 'INPUT' as 'INPUT' | 'CALCULATED',
     formula: '',
     calcType: 'FORMULA' as 'FORMULA' | 'SYSTEM',
+    dataSource: '' as string,
     order: 99,
     isEditable: true,
   })
@@ -68,7 +77,7 @@ export function TemplateManager() {
   /** 打开新增表单 */
   const handleAdd = () => {
     setEditingItem(null)
-    setForm({ name: '', code: '', type: 'INPUT', formula: '', calcType: 'FORMULA', order: items?.length ? items.length + 1 : 99, isEditable: true })
+    setForm({ name: '', code: '', type: 'INPUT', formula: '', calcType: 'FORMULA', dataSource: '', order: items?.length ? items.length + 1 : 99, isEditable: true })
     setShowForm(true)
   }
 
@@ -81,6 +90,7 @@ export function TemplateManager() {
       type: item.type,
       formula: item.formula || '',
       calcType: item.calcType || 'FORMULA',
+      dataSource: item.dataSource || '',
       order: item.order,
       isEditable: item.isEditable,
     })
@@ -98,6 +108,7 @@ export function TemplateManager() {
       type: form.type,
       formula: form.type === 'CALCULATED' ? form.formula.trim() || null : null,
       calcType: form.type === 'CALCULATED' ? form.calcType : 'FORMULA',
+      dataSource: form.dataSource || null,
       order: Number(form.order),
       isEditable: form.isEditable,
     }
@@ -132,6 +143,7 @@ export function TemplateManager() {
                   <th className="py-2 px-2 w-32">字段代码</th>
                   <th className="py-2 px-2 w-20">类型</th>
                   <th className="py-2 px-2 w-24">计算方式</th>
+                  <th className="py-2 px-2 w-24">数据来源</th>
                   <th className="py-2 px-2 w-48">计算公式</th>
                   <th className="py-2 px-2 w-16">可编辑</th>
                   <th className="py-2 px-2 text-right w-24">操作</th>
@@ -155,6 +167,15 @@ export function TemplateManager() {
                         </span>
                       )}
                     </td>
+                    <td className="py-2 px-2">
+                      {item.dataSource ? (
+                        <span className="px-2 py-0.5 rounded text-xs whitespace-nowrap bg-cyan-50 text-cyan-600">
+                          {DATA_SOURCE_LABELS[item.dataSource] || item.dataSource}
+                        </span>
+                      ) : (
+                        <span className="text-xs text-gray-400">手动填写</span>
+                      )}
+                    </td>
                     <td className="py-2 px-2 text-gray-500 font-mono text-xs max-w-48 truncate" title={item.formula || ''}>{item.formula || '—'}</td>
                     <td className="py-2 px-2">
                       <span className={`text-xs ${item.isEditable ? 'text-safe' : 'text-gray-500'}`}>
@@ -283,6 +304,22 @@ export function TemplateManager() {
                   </div>
                 </div>
               )}
+              {form.type === 'INPUT' && (
+                <div>
+                  <Label>数据来源</Label>
+                  <Select
+                    value={form.dataSource}
+                    onChange={(e) => setForm({ ...form, dataSource: e.target.value })}
+                  >
+                    <option value="">手动填写</option>
+                    <option value="overtime">加班记录（从加班系统获取）</option>
+                    <option value="performance">绩效记录（从绩效系统获取）</option>
+                    <option value="bonus">奖金记录（从奖金系统导入）</option>
+                    <option value="deduction">扣款记录（从扣款系统导入）</option>
+                  </Select>
+                  <p className="text-xs text-gray-500 mt-1">选择外部数据来源后，发薪批次中会显示对应的"获取"按钮</p>
+                </div>
+              )}
               <div>
                 <label className="flex items-center gap-2 cursor-pointer">
                   <input