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/settlement-adjustment-editor.vue

@@ -1,8 +1,7 @@
 <template>
   <el-dialog v-model="visible" :title="title" width="94%" top="3vh" append-to-body destroy-on-close>
     <div v-loading="loading" class="settlement-adjustment-editor">
-      <section class="settlement-adjustment-editor__section">
-        <div class="dialog-section-title">基本信息</div>
+      <section-card title="基本信息">
         <el-form
           ref="formRef"
           :model="form"
@@ -57,11 +56,10 @@
             >
           </el-row>
         </el-form>
-      </section>
+      </section-card>
 
-      <section class="settlement-adjustment-editor__section">
-        <div class="settlement-adjustment-editor__section-head">
-          <div class="dialog-section-title">调整费用</div>
+      <section-card title="调整费用">
+        <template #extra>
           <el-button
             v-if="editable && form.formalSettlementId"
             type="primary"
@@ -69,7 +67,7 @@
             @click="openFeeDialog"
             >添加费用</el-button
           >
-        </div>
+        </template>
         <el-table :data="details" border>
           <el-table-column type="index" label="序号" width="64" align="center" /><el-table-column
             prop="feeType"
@@ -141,7 +139,7 @@
           }}</strong
           >；调整后结算金额：<strong>{{ formatMoney(form.adjustedSettlementAmount) }}</strong>
         </div>
-      </section>
+      </section-card>
     </div>
     <template #footer
       ><el-button @click="visible = false">取消</el-button
@@ -354,15 +352,6 @@ export default {
 </script>
 
 <style scoped lang="scss">
-.settlement-adjustment-editor__section {
-  margin-bottom: 24px;
-}
-.settlement-adjustment-editor__section-head {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  margin-bottom: 12px;
-}
 .settlement-adjustment-editor__summary {
   padding: 12px 0;
   text-align: right;
@@ -379,18 +368,4 @@ export default {
 .negative {
   color: #f56c6c;
 }
-.dialog-section-title {
-  display: flex;
-  align-items: center;
-  min-height: 22px;
-  font-size: 16px;
-  font-weight: 600;
-}
-.dialog-section-title::before {
-  width: 4px;
-  height: 18px;
-  margin-right: 8px;
-  background: #409eff;
-  content: '';
-}
 </style>