feat(cargo-type): 优化顶部按钮区界面和样式

- 将“添加分类”按钮文字修改为“新增”以统一风格
- 为批量导入、下载模板、批量导出和批量删除按钮添加对应 Element Plus 图标
- 在组件中引入并注册 Search、Plus、Upload、Download、Delete 图标组件
- 新增样式规则，去除 basic-container 卡片内层 el-card 的 padding，符合设计规范4.4
- 隐藏表格工具栏中的搜索图标按钮，优化界面简洁度

src/views/base/cargo-type.vue

@@ -30,32 +30,32 @@
       </div>
       <div class="compact-search__actions">
         <el-button type="primary" v-if="permission.cargo_type_add" @click="$refs.crud.rowAdd()">
-          <el-icon class="el-icon--left"><Plus /></el-icon>添加分类
+          <el-icon class="el-icon--left"><Plus /></el-icon>新增
         </el-button>
         <el-button
           type="primary"
           plain
           v-if="permission.cargo_type_import"
           @click="handleImport"
-        >批量导入</el-button>
+        ><el-icon class="el-icon--left"><Upload /></el-icon>批量导入</el-button>
         <el-button
           type="primary"
           plain
           v-if="permission.cargo_type_template"
           @click="handleTemplate"
-        >下载模板</el-button>
+        ><el-icon class="el-icon--left"><Download /></el-icon>下载模板</el-button>
         <el-button
           type="primary"
           plain
           v-if="permission.cargo_type_export"
           @click="handleExport"
-        >批量导出</el-button>
+        ><el-icon class="el-icon--left"><Download /></el-icon>批量导出</el-button>
         <el-button
           type="danger"
           plain
           v-if="permission.cargo_type_delete"
           @click="handleDelete"
-        >批量删除</el-button>
+        ><el-icon class="el-icon--left"><Delete /></el-icon>批量删除</el-button>
       </div>
     </div>
 
@@ -176,7 +176,7 @@ import { openImportDialog } from '@/utils/import-excel';
 import { getToken } from '@/utils/auth';
 import NProgress from 'nprogress';
 import 'nprogress/nprogress.css';
-import { Search, Plus } from '@element-plus/icons-vue';
+import { Search, Plus, Upload, Download, Delete } from '@element-plus/icons-vue';
 
 // 导入失败明细中，每个错误文本对应的「字段列」与「规则说明」
 const CARGO_TYPE_FAIL_RULES = [
@@ -273,7 +273,7 @@ export const decorateCargoTypeFailDetail = async workbook => {
 };
 
 export default {
-  components: { Search, Plus },
+  components: { Search, Plus, Upload, Download, Delete },
   data() {
     return {
       form: {},
@@ -652,6 +652,11 @@ export default {
     box-shadow: none;
   }
 
+  // 去除 basic-container 卡片内层 el-card 的 padding（规范 4.4）
+  :deep(.basic-container__card) > .el-card__body {
+    padding: 0;
+  }
+
   // 隐藏表格工具栏中的搜索图标按钮
   :deep(.avue-crud__search-btn) {
     display: none !important;