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/page/article-manage/hotWords.vue

@@ -20,32 +20,22 @@
   </div>
 </template>
 
-<script>
+<script setup>
+import { ref } from "vue";
 import todayHotWords from "./template/todayHotWords";
 import historyHotWords from "./template/historyHotWords";
 import setupHotWords from "./template/setupHotWords";
 import statisticsHotWords from "./template/statisticsHotWords";
 
-export default {
-  name: "hotWords",
-  components: {
-    todayHotWords,
-    historyHotWords,
-    setupHotWords,
-    statisticsHotWords,
-  },
-  data() {
-    return {
-      templatesWay: [
-        { template: "todayHotWords", label: "今日热词" },
-        { template: "historyHotWords", label: "历史热词" },
-        { template: "statisticsHotWords", label: "热词统计" },
-        { template: "setupHotWords", label: "设置热词" },
-      ],
-      currentTemplate: "todayHotWords",
-    };
-  },
-};
+defineOptions({ name: "hotWords" });
+
+const templatesWay = ref([
+  { template: "todayHotWords", label: "今日热词" },
+  { template: "historyHotWords", label: "历史热词" },
+  { template: "statisticsHotWords", label: "热词统计" },
+  { template: "setupHotWords", label: "设置热词" },
+]);
+const currentTemplate = ref("todayHotWords");
 </script>
 
 <style lang="scss" scoped></style>