style(business): 优化业务弹窗布局与样式统一

- 修改 dispatchItemForm 表单标签宽度为 calc(6em + 24px)，统一label宽度标准
- 调整 business-crud-page 内 section-card 间距，避免卡片紧贴，符合整体风格
- 规范 detail-content 内部元素间距及白卡底部边距，提升视觉一致性
- 调整 contract-manage select 组件列占比，优化表单布局
- 调整 customer-archive 弹窗间距，增强界面美观
- 全站弹窗新增底部操作栏固定与滚动内容区，提升弹窗交互体验
- port-terminal、railway-station 弹窗表单标签宽度调整及样式改进，提高表单对齐效果
- 统一多处弹窗及表单组件底部间距，确保全局风格一致
- port-terminal 弹窗取消分组白卡，恢复原有结构以满足用户需求

src/views/business/components/business-crud-page.vue

@@ -2685,7 +2685,7 @@
       <el-form
         :model="dispatchItemForm"
         label-position="right"
-        label-width="auto"
+        label-width="calc(6em + 24px)"
         class="business-crud-page__dispatch-item-form"
       >
         <div class="dialog-section-title">收发货信息</div>
@@ -10268,7 +10268,7 @@ export default {
     grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
     gap: 16px;
     align-items: stretch;
-    margin-bottom: 12px;
+    margin-bottom: 8px;
   }
 
   &__dispatch-summary-card,
@@ -10702,9 +10702,11 @@ export default {
   &__detail-content {
     display: flex;
     flex-direction: column;
-    gap: 12px;
+    gap: 8px;
 
     .section-card {
+      margin-bottom: 0 !important;
+
       :deep(.el-descriptions__label) {
         width: 140px;
         color: #606266;
@@ -10803,8 +10805,12 @@ export default {
     }
   }
 }
-.section-card{
-  margin-bottom: 0 !important;
+.section-card {
+  margin-bottom: 8px !important;
+
+  &:last-child {
+    margin-bottom: 0 !important;
+  }
 }
 
 /* 编辑弹窗：含分组的 Avue form 渲染为白卡风格 */
@@ -10813,7 +10819,7 @@ export default {
   border-radius: 6px;
   box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
   padding: 16px;
-  margin-bottom: 16px;
+  margin-bottom: 8px;
 
   .avue-form__group--title {
     padding: 0 !important;