fix: 单据详情面板费用明细与变更记录表体内部滚动，表头固定

src/views/settlement/receivable-payable-detail.vue

@@ -136,7 +136,7 @@
         <div class="settlement-detail-page__detail-panel-body">
           <el-tabs v-model="detailDialog.activeTab" @tab-change="handleDetailTabChange">
             <el-tab-pane label="费用明细" name="fee">
-              <el-table v-loading="detailDialog.loading" :data="feeRows" border>
+              <el-table v-loading="detailDialog.loading" :data="feeRows" :max-height="detailTableMaxHeight" border>
                 <el-table-column type="index" label="序号" width="64" align="center" />
                 <el-table-column
                   v-for="column in feeDetailColumns"
@@ -168,7 +168,7 @@
               </el-table>
             </el-tab-pane>
             <el-tab-pane label="变更记录" name="change">
-              <el-table v-loading="latestChangeLoading" :data="latestChangeRows" border>
+              <el-table v-loading="latestChangeLoading" :data="latestChangeRows" :max-height="detailTableMaxHeight" border>
                 <el-table-column type="index" label="序号" width="64" align="center" />
                 <el-table-column
                   v-for="column in changeRecordColumns"
@@ -1226,6 +1226,11 @@ export default {
       if (!this.adjustDialog.visible) return 40 + 49 * 3 + 16;
       return Math.round(Math.min(window.innerHeight * 0.6, 560)) - 138;
     },
+    detailTableMaxHeight() {
+      // 同上，另减 body 下内边距(16) 和 tabs 头(55)
+      if (!this.detailDialog.visible) return 40 + 49 * 3 + 16;
+      return Math.round(Math.min(window.innerHeight * 0.6, 560)) - 178;
+    },
     generateContractName() {
       const contract = this.contractOptions.find(
         item => String(item.id) === String(this.generateQuery.contractId)