升级Vue3，iView替换ElementPlus

- 删除babel配置、更新依赖与入口初始化
- 全量替换UI组件、样式适配，新增迁移文档与标签/过滤器自动化替换脚本

buyer/src/utils/iconMap.js

@@ -0,0 +1,83 @@
+import {
+  Check,
+  Close,
+  Delete,
+  Plus,
+  ArrowDown,
+  ArrowUp,
+  ArrowRight,
+  ArrowLeft,
+  ShoppingCart,
+  Camera,
+  View,
+  Warning,
+  Help,
+  Edit,
+  InfoFilled,
+  User,
+  Lock,
+  Iphone,
+  Search,
+  Document,
+  Refresh,
+  Link,
+  Key,
+  AlarmClock,
+  Location,
+  Star,
+  StarFilled,
+  CircleClose,
+  ShoppingCartFull,
+  Tickets,
+  PriceTag,
+  Money,
+} from "@element-plus/icons-vue";
+
+/** 旧 iView type 字符串 → Element Plus 图标组件 */
+export const ICON_MAP = {
+  "md-checkmark": Check,
+  "md-close": Close,
+  "md-trash": Delete,
+  "md-add": Plus,
+  "md-arrow-dropdown": ArrowDown,
+  "md-arrow-dropup": ArrowUp,
+  "md-person": User,
+  "md-lock": Lock,
+  "md-phone-portrait": Iphone,
+  "md-key": Key,
+  "md-link": Link,
+  "md-refresh": Refresh,
+  "ios-arrow-down": ArrowDown,
+  "ios-arrow-up": ArrowUp,
+  "ios-arrow-forward": ArrowRight,
+  "ios-arrow-back": ArrowLeft,
+  "ios-arrow-round-down": ArrowDown,
+  "ios-arrow-round-forward": ArrowRight,
+  "ios-cart-outline": ShoppingCart,
+  "ios-camera": Camera,
+  "ios-eye-outline": View,
+  "ios-trash-outline": Delete,
+  "ios-alert-outline": Warning,
+  "ios-help-circle-outline": Help,
+  "ios-add-circle-outline": Plus,
+  "ios-information-circle": InfoFilled,
+  "ios-search": Search,
+  "ios-text-outline": Document,
+  "ios-alarm-outline": AlarmClock,
+  "md-qr-scanner": Iphone,
+  edit: Edit,
+  "trash-a": Delete,
+  location: Location,
+  "ios-heart": StarFilled,
+  "md-close-circle": CircleClose,
+  "ios-cart": ShoppingCartFull,
+  "md-clipboard": Tickets,
+  "md-pricetag": PriceTag,
+  "logo-usd": Money,
+  "ios-eye": View,
+  "md-star": Star,
+};
+
+export function resolveIcon(type) {
+  return ICON_MAP[type] || InfoFilled;
+}

buyer/src/utils/message.js

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+import { ElMessage, ElMessageBox } from "element-plus";
+
+export const Message = {
+  success(content) {
+    return ElMessage.success(normalize(content));
+  },
+  error(content) {
+    return ElMessage.error(normalize(content));
+  },
+  warning(content) {
+    return ElMessage.warning(normalize(content));
+  },
+  info(content) {
+    return ElMessage.info(normalize(content));
+  },
+};
+
+export const Notice = {
+  open(options = {}) {
+    const fn = Message[options.type] || Message.info;
+    return fn(options.desc || options.title || "");
+  },
+  info(options) {
+    return Message.info(options?.desc || options?.title || "");
+  },
+  success(options) {
+    return Message.success(options?.desc || options?.title || "");
+  },
+  warning(options) {
+    return Message.warning(options?.desc || options?.title || "");
+  },
+  error(options) {
+    return Message.error(options?.desc || options?.title || "");
+  },
+};
+
+export const Modal = {
+  confirm(options = {}) {
+    const content = options.content || options.title || "确认操作？";
+    return ElMessageBox.confirm(content, options.title || "提示", {
+      confirmButtonText: options.okText || "确定",
+      cancelButtonText: options.cancelText || "取消",
+      type: options.type || "warning",
+    })
+      .then(() => {
+        if (typeof options.onOk === "function") {
+          return options.onOk();
+        }
+      })
+      .catch(() => {
+        if (typeof options.onCancel === "function") {
+          options.onCancel();
+        }
+      });
+  },
+  remove() {
+    ElMessageBox.close();
+  },
+};
+
+function normalize(content) {
+  if (typeof content === "string") return content;
+  if (content && content.content) return content.content;
+  return String(content ?? "");
+}
+
+export function setupLegacyMessage(app) {
+  app.config.globalProperties.$Message = Message;
+  app.config.globalProperties.$Modal = Modal;
+  app.config.globalProperties.$Notice = Notice;
+}