refactor: 四端完成 Options API → script setup + vuex → pinia 迁移

- buyer(95) / seller(169) / im(53) / manager(280) 共 597 个组件全部从 Options API 转换为 <script setup>
- 四端 vuex 全部移除，状态管理统一迁移至 pinia 4（stores/ 目录）
- util.js 等基础设施去除 vm 首参依赖；全局属性（$Message/$filters 等）在 script 内改为具名导入
- 被外部 ref 访问的公共组件均已补齐 defineExpose（清单见各端 MIGRATION-VUE3.md）
- 各端 eslint 启用 vue/component-api-style 防止新代码回退 Options API
- 四端 yarn build 全部通过；迁移约定与注意事项已更新至各端 MIGRATION-VUE3.md

manager/src/views/order/flow/refundLog.vue

@@ -2,7 +2,7 @@
   <div class="search">
     <el-card>
       <el-form
-        ref="searchForm"
+        ref="searchFormRef"
         :model="searchForm"
         inline
         label-width="70px"
@@ -108,71 +108,68 @@
   </div>
 </template>
 
-<script>
+<script setup>
+import { onMounted, reactive, ref } from "vue";
 import * as API_Order from "@/api/order";
 import { unitPrice } from "@/utils/filters";
 
-export default {
-  name: "refundLog",
-  data() {
-    return {
-      loading: true,
-      searchForm: {
-        pageNumber: 1,
-        pageSize: 20,
-        sort: "createTime",
-        order: "desc",
-        startDate: "",
-        endDate: "",
-        orderSn: "",
-        isRefund: "",
-      },
-      selectDate: null,
-      data: [],
-      total: 0,
-    };
-  },
-  methods: {
-    unitPrice,
-    init() {
-      this.getDataList();
-    },
-    changePage(v) {
-      this.searchForm.pageNumber = v;
-      this.getDataList();
-    },
-    changePageSize(v) {
-      this.searchForm.pageNumber = 1;
-      this.searchForm.pageSize = v;
-      this.getDataList();
-    },
-    handleSearch() {
-      this.searchForm.pageNumber = 1;
-      this.searchForm.pageSize = 20;
-      this.getDataList();
-    },
-    selectDateRange(v) {
-      if (v && v[0] && v[1]) {
-        this.searchForm.startDate = v[0];
-        this.searchForm.endDate = v[1];
-      } else {
-        this.searchForm.startDate = "";
-        this.searchForm.endDate = "";
-      }
-    },
-    getDataList() {
-      this.loading = true;
-      API_Order.refundLog(this.searchForm).then((res) => {
-        this.loading = false;
-        if (res.success) {
-          this.data = res.result.records;
-          this.total = res.result.total;
-        }
-      });
-    },
-  },
-  mounted() {
-    this.init();
-  },
-};
+defineOptions({ name: "refundLog" });
+
+const searchFormRef = ref(null);
+
+const loading = ref(true);
+const searchForm = reactive({
+  pageNumber: 1,
+  pageSize: 20,
+  sort: "createTime",
+  order: "desc",
+  startDate: "",
+  endDate: "",
+  orderSn: "",
+  isRefund: "",
+});
+const selectDate = ref(null);
+const data = ref([]);
+const total = ref(0);
+
+function init() {
+  getDataList();
+}
+function changePage(v) {
+  searchForm.pageNumber = v;
+  getDataList();
+}
+function changePageSize(v) {
+  searchForm.pageNumber = 1;
+  searchForm.pageSize = v;
+  getDataList();
+}
+function handleSearch() {
+  searchForm.pageNumber = 1;
+  searchForm.pageSize = 20;
+  getDataList();
+}
+function selectDateRange(v) {
+  if (v && v[0] && v[1]) {
+    searchForm.startDate = v[0];
+    searchForm.endDate = v[1];
+  } else {
+    searchForm.startDate = "";
+    searchForm.endDate = "";
+  }
+}
+function getDataList() {
+  loading.value = true;
+  API_Order.refundLog(searchForm).then((res) => {
+    loading.value = false;
+    if (res.success) {
+      data.value = res.result.records;
+      total.value = res.result.total;
+    }
+  });
+}
+
+onMounted(() => {
+  init();
+});
 </script>