refactor: 国际化文本迁移至全局 locales/messages.js

将组件级 i18n 对象重构为统一由全局 locales/messages.js 管理，确保中英文语言切换时正确显示对应文本。

- 新增 utils/i18n.js 国际化工具函数
- 更新 store/$t.mixin.js 翻译混入逻辑
- 迁移 pkgService、pkgBooking、pkgAccount、pkgExplore、pages 等共 58 个组件的中英文文本至全局消息表

pages/index/component/SelectRoomTab.vue

@@ -114,64 +114,6 @@ export default {
     SelectRoomHero,
     SelectRoomAreaPanel
   },
-  i18n: {
-    zh: {
-      shareTitle: '绿居公寓 - 国际化青年社区',
-      all: '全部',
-      allAreas: '全部区域',
-      allTags: '全部标签',
-      apartmentDetail: '公寓详情',
-      areaStatus: '区域状态',
-      areaStatusDesc: '暂无符合筛选条件的区域',
-      areaUnavailableTitle: '该区域暂未开放',
-      bookViewing: '预约看房',
-      defaultAreaAddressPrefix: '位于',
-      distancePlaceholder: '附近',
-      emptyAreaDesc: '当前筛选条件下暂无可用房源',
-      emptyAreaTitle: "暂无匹配房源",
-      emptyBannerDesc: "暂无可展示的轮播图",
-      emptyBannerTitle: "暂无轮播图",
-      learnMore: "了解更多",
-      loadingAreaStatus: "区域加载中",
-      pricePending: "待定",
-      priceUnit: "元/月起",
-      searchApartment: "搜索区域、公寓或房型",
-      sortDefault: "默认排序",
-      sortNameAsc: "名称排序",
-      sortPriceAsc: "价格从低到高",
-      sortPriceDesc: "价格从高到低",
-      tagFilter: "标签筛选",
-      viewCommunity: "查看详情"
-    },
-    en: {
-      shareTitle: 'Luju Apartments - International Youth Community',
-      all: "All",
-      allAreas: "All Areas",
-      allTags: "All Tags",
-      apartmentDetail: "Apartment Detail",
-      areaStatus: "Area Status",
-      areaStatusDesc: "No areas matched the current filter.",
-      areaUnavailableTitle: "Area information unavailable",
-      bookViewing: "Book Viewing",
-      defaultAreaAddressPrefix: "Located at ",
-      distancePlaceholder: "Nearby",
-      emptyAreaDesc: "No rooms available under the current filters.",
-      emptyAreaTitle: "No matched rooms",
-      emptyBannerDesc: "No active banners available.",
-      emptyBannerTitle: "No banners",
-      learnMore: "Learn More",
-      loadingAreaStatus: "Loading areas",
-      pricePending: "TBD",
-      priceUnit: "/month",
-      searchApartment: "Search by area, apartment or room type",
-      sortDefault: "Default",
-      sortNameAsc: "Name",
-      sortPriceAsc: "Price: Low to High",
-      sortPriceDesc: "Price: High to Low",
-      tagFilter: "Tags",
-      viewCommunity: "View Details"
-    }
-  },
   data() {
     return {
       isLogin: false,
@@ -213,12 +155,12 @@ export default {
         return this.getLocalizedAreaText(matchedArea)
       }
       if (this.currentLang === 'en') {
-        return this.currentBanner.areaLabelEnDisplay || this.currentBanner.areaLabelEn || this.currentBanner.areaLabel || this.t('allAreas')
+        return this.currentBanner.areaLabelEnDisplay || this.currentBanner.areaLabelEn || this.currentBanner.areaLabel || this.$tr('全部区域')
       }
-      return this.currentBanner.areaLabel || this.t('allAreas')
+      return this.currentBanner.areaLabel || this.$tr('全部区域')
     },
     currentTagLabel() {
-      return this.selectedTag || this.t('allTags')
+      return this.selectedTag || this.$tr('全部标签')
     },
     availableFilterTags() {
       const preferredOrder = ['押一付一', '生活便利', '独立厨卫', '商圈环绕', '民水民电', '拎包入住', '近地铁', '智能家居']
@@ -262,9 +204,6 @@ export default {
     await Promise.all([this.loadBannerList(), this.loadAreaList()])
   },
   methods: {
-    t(key) {
-      return this.$tm('pages.index.component.SelectRoomTab', key)
-    },
     getLocalizedBannerText(banner = {}, field = '') {
       const key = String(field || '').trim()
       if (!key) {
@@ -512,7 +451,7 @@ export default {
       } else {
         // 容错处理
         uni.showToast({
-          title: this.t('areaUnavailableTitle'),
+          title: this.$tr('该区域暂未开放'),
           icon: 'none'
         })
       }
@@ -547,13 +486,13 @@ export default {
   ,
   onShareAppMessage() {
     return {
-      title: this.t('shareTitle'),
+      title: this.$tr('绿居公寓 - 国际化青年社区'),
       path: '/pages/index/index'
     }
   },
   onShareTimeline() {
     return {
-      title: this.t('shareTitle')
+      title: this.$tr('绿居公寓 - 国际化青年社区')
     }
   }
 }