feat: 新增售后异议管理全流程功能

本次提交完成售后异议管理模块的开发，主要包括以下内容：
1. 新增售后异议主页面、待办页面和意见填写页面
2. 新增5个通用业务组件用于页面渲染
3. 新增4个业务API接口文件
4. 优化流程图表单描述、文件列表样式和钢卷信息展示
5. 完善投诉受理单的日期格式化和实体类继承

klp-ui/src/views/wms/post/objection/components/BasicInfoSection.vue

@@ -0,0 +1,57 @@
+<template>
+  <div v-if="enabled" class="section-container">
+    <div class="detail-section">
+      <div class="detail-section-label">投诉情况</div>
+      <div class="detail-section-text">{{ data.complaintContent || '-' }}</div>
+    </div>
+
+    <div class="detail-section">
+      <div class="detail-section-label">客户诉求</div>
+      <div class="detail-section-text">{{ data.customerDemand || '-' }}</div>
+    </div>
+
+    <div class="detail-section" v-if="data.file">
+      <div class="detail-section-label">凭证文件</div>
+      <FileList :ossIds="data.file" />
+    </div>
+  </div>
+</template>
+
+<script>
+import FileList from "@/components/FileList/index.vue";
+
+export default {
+  name: 'BasicInfoSection',
+  components: { FileList },
+  props: {
+    enabled: {
+      type: Boolean,
+      default: true
+    },
+    data: {
+      type: Object,
+      default: () => ({})
+    }
+  }
+}
+</script>
+
+<style scoped>
+.detail-section {
+  margin-bottom: 14px;
+}
+.detail-section-label {
+  font-size: 12px;
+  font-weight: 600;
+  color: #909399;
+  margin-bottom: 4px;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+.detail-section-text {
+  font-size: 14px;
+  color: #303133;
+  line-height: 1.6;
+  word-break: break-all;
+}
+</style>