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

pkgBooking/book_viewing/components/RoomTypeSelector.vue

@@ -3,7 +3,7 @@
     <view class="selector-header tn-flex tn-flex-row-between tn-flex-col-center" @click="openSelector">
       <view class="selected-info">
         <view class="selected-name tn-text-ellipsis" :class="{ 'is-empty': !selectedRoomType }">
-          {{ selectedRoomType ? getRoomTypeDisplayName(selectedRoomType) : t('selectRoomType') }}
+          {{ selectedRoomType ? getRoomTypeDisplayName(selectedRoomType) : $tr('请选择房型') }}
         </view>
         <view class="selected-area tn-text-ellipsis" v-if="selectedArea">
           {{ getAreaDisplayName(selectedArea) }}
@@ -15,17 +15,17 @@
     <tn-popup v-model="showPopup" mode="bottom" length="80%" :borderRadius="32" :closeBtn="true">
       <view class="popup-content">
         <view class="popup-header">
-          <text class="popup-title">{{ t('popupTitle') }}</text>
+          <text class="popup-title">{{ $tr('选择意向房型') }}</text>
         </view>
 
         <scroll-view scroll-y class="area-list-scroll">
           <view v-if="isLoading" class="loading-state tn-padding-xl tn-text-center">
             <tn-loading mode="circle"></tn-loading>
-            <view class="tn-margin-top-sm tn-color-gray">{{ t('loadingRoomTypes') }}</view>
+            <view class="tn-margin-top-sm tn-color-gray">{{ $tr('房型加载中...') }}</view>
           </view>
 
           <view v-else-if="!areaList.length" class="empty-state tn-padding-xl tn-text-center">
-            <text class="tn-color-gray">{{ t('emptyRoomTypes') }}</text>
+            <text class="tn-color-gray">{{ $tr('暂无可选房型') }}</text>
           </view>
 
           <view v-else class="area-group" v-for="(area, index) in areaList" :key="area.code">
@@ -45,7 +45,7 @@
                 @click="handleSelect(area, room)"
               >
                 <view class="room-name tn-text-ellipsis">{{ getRoomTypeDisplayName(room) }}</view>
-                <view class="room-price" v-if="room.price">¥{{ getPriceValue(room.price) }}{{ t('priceUnit') }}</view>
+                <view class="room-price" v-if="room.price">¥{{ getPriceValue(room.price) }}{{ $tr('/月') }}</view>
               </view>
             </view>
           </view>
@@ -117,10 +117,6 @@ export default {
     this.loadData()
   },
   methods: {
-    t(key) {
-      const lang = I18N[this.language] ? this.language : 'zh'
-      return I18N[lang][key] || I18N.zh[key] || key
-    },
     openSelector() {
       this.showPopup = true
       this.loadData()
@@ -149,7 +145,7 @@ export default {
         })
         .catch((error) => {
           console.error('load room types error', error)
-          uni.showToast({ title: this.t('loadFailed'), icon: 'none' })
+          uni.showToast({ title: this.$tr('房型加载失败'), icon: 'none' })
         })
         .finally(() => {
           this.isLoading = false