style(ui): 统一全站 el-table 表头背景色及弹窗卡片化风格

- 将所有 el-table 表头背景色统一设为浅灰 #fafafa，覆盖普通表格、avue-crud 和固定列
- 移除业务组件内冗余的表头样式，改由全局样式统一控制
- 调整多处弹窗（预结算单、正式结算单、运输对账单、应收明细等）内容板块，改用全局 section-card 组件实现白底卡片分组
- 为多个弹窗内的搜索区域增加白底、圆角和阴影样式，提升视觉层次感
- 缩减多处表格“操作”列宽度以适配新布局
- 付款申请弹窗按钮由主色调 primary 改为 success，符合全站按钮风格规范
- 统一调整弹窗内表单、按钮、间距及背景细节，改善界面体验和视觉一致性

src/views/settlement/components/formal-settlement-editor.vue

@@ -1,8 +1,7 @@
 <template>
   <el-dialog v-model="visible" :title="title" width="96%" top="2vh" append-to-body destroy-on-close>
     <div v-loading="loading" class="formal-editor">
-      <section class="formal-editor__section">
-        <div class="dialog-section-title">结算基本信息</div>
+      <section-card title="结算基本信息">
         <el-form
           ref="formRef"
           :model="form"
@@ -64,11 +63,10 @@
             </el-col>
           </el-row>
         </el-form>
-      </section>
+      </section-card>
 
-      <section class="formal-editor__section">
-        <div class="formal-editor__section-head">
-          <div class="dialog-section-title">来源预结算单</div>
+      <section-card title="来源预结算单">
+        <template #extra>
           <div class="formal-editor__actions">
             <el-button v-if="editable" type="primary" plain @click="openCandidateDialog"
               >选择预结算单</el-button
@@ -77,7 +75,7 @@
               >选择结算明细</el-button
             >
           </div>
-        </div>
+        </template>
         <el-table :data="sources" border>
           <el-table-column type="index" label="序号" width="64" align="center" />
           <el-table-column
@@ -97,10 +95,9 @@
             >
           </el-table-column>
         </el-table>
-      </section>
+      </section-card>
 
-      <section v-if="details.length" class="formal-editor__section">
-        <div class="dialog-section-title">结算明细</div>
+      <section-card v-if="details.length" title="结算明细">
         <el-table :data="details" border>
           <el-table-column type="index" label="序号" width="64" fixed="left" align="center" />
           <el-table-column
@@ -131,10 +128,9 @@
             </template>
           </el-table-column>
         </el-table>
-      </section>
+      </section-card>
 
-      <section class="formal-editor__section">
-        <div class="dialog-section-title">附件</div>
+      <section-card title="附件">
         <vehicle-attachment-upload
           v-model="attachments"
           :readonly="!editable"
@@ -143,10 +139,9 @@
           :max-size="500"
           :file-types="attachmentFileTypes"
         />
-      </section>
+      </section-card>
 
-      <section v-if="readonly && payments.length" class="formal-editor__section">
-        <div class="dialog-section-title">付款信息</div>
+      <section-card v-if="readonly && payments.length" title="付款信息">
         <el-table :data="payments" border>
           <el-table-column type="index" label="序号" width="64" align="center" />
           <el-table-column
@@ -167,7 +162,7 @@
             </template>
           </el-table-column>
         </el-table>
-      </section>
+      </section-card>
     </div>
     <template #footer>
       <el-button @click="visible = false">取消</el-button>
@@ -177,7 +172,7 @@
     </template>
 
     <el-dialog v-model="candidate.visible" title="选择预结算单" width="88%" append-to-body>
-      <el-form :model="candidate.query" inline label-position="right" label-width="160px">
+      <el-form :model="candidate.query" inline label-position="right" label-width="160px" class="formal-editor__candidate-search">
         <el-form-item label="预结算单号"
           ><el-input v-model="candidate.query.preSettlementNo" clearable
         /></el-form-item>
@@ -227,7 +222,7 @@
     </el-dialog>
 
     <el-dialog v-model="detailCandidate.visible" title="选择结算明细" width="92%" append-to-body>
-      <el-form :model="detailCandidate.query" inline label-position="right" label-width="160px">
+      <el-form :model="detailCandidate.query" inline label-position="right" label-width="160px" class="formal-editor__detail-search">
         <el-form-item label="批次号"
           ><el-input v-model="detailCandidate.query.batchNo" clearable
         /></el-form-item>
@@ -725,15 +720,6 @@ export default {
 </script>
 
 <style scoped lang="scss">
-.formal-editor__section {
-  margin-bottom: 24px;
-}
-.formal-editor__section-head {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  margin-bottom: 12px;
-}
 .formal-editor__actions {
   display: flex;
   gap: 8px;
@@ -761,4 +747,13 @@ export default {
 .formal-editor__adjust-reason {
   margin-top: 16px;
 }
+/* 选择预结算单 / 选择结算明细 弹窗搜索区白底 */
+.formal-editor__candidate-search,
+.formal-editor__detail-search {
+  background: #fff;
+  border-radius: 6px;
+  padding: 12px;
+  margin-bottom: 16px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
+}
 </style>