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/book.vue

@@ -1,7 +1,7 @@
 <template>
   <view class="book-page tn-safe-area-inset-bottom">
     <tn-nav-bar :isBack="true" :bottomShadow="false" backgroundColor="#F8F9FA">
-      <view class="tn-text-bold tn-text-xl tn-color-black">{{ t('title') }}</view>
+      <view class="tn-text-bold tn-text-xl tn-color-black">{{ $tr('预订确认') }}</view>
     </tn-nav-bar>
 
     <view class="book-content tn-padding" :style="{paddingTop: vuex_custom_bar_height + 'px', paddingBottom: '180rpx'}">
@@ -13,7 +13,7 @@
         </view>
         <view class="preview-info tn-flex-1 tn-margin-left tn-flex tn-flex-direction-column tn-flex-row-between">
           <view>
-            <view class="tn-text-sm tn-color-gray">{{ t('bookingFor') }}</view>
+            <view class="tn-text-sm tn-color-gray">{{ $tr('你正在预约') }}</view>
             <view class="tn-text-bold tn-text-lg tn-color-black tn-margin-top-xs clamp-text-2">
               {{ displayStyleName }}
             </view>
@@ -24,7 +24,7 @@
           <view class="tn-flex tn-flex-row-between tn-flex-col-bottom tn-margin-top-sm">
             <view class="room-tag tn-text-xs tn-text-bold">{{ displayLocationText }}</view>
             <view class="tn-color-black tn-text tn-text-bold">
-              <text class="tn-text-sm tn-color-gray tn-margin-right-xs">{{ t('deposit') }}</text>$500.00
+              <text class="tn-text-sm tn-color-gray tn-margin-right-xs">{{ $tr('定金') }}</text>$500.00
             </view>
           </view>
         </view>
@@ -32,15 +32,15 @@
 
       <!-- 填写日期表单 -->
       <view class="form-section tn-margin-bottom-xl tn-padding-lg form-card">
-        <view class="section-title tn-text-bold tn-text-xl tn-margin-bottom-xs">{{ t('checkInDate') }}</view>
-        <view class="tn-color-gray tn-text-sm tn-margin-bottom-lg">{{ t('checkInDesc') }}</view>
+        <view class="section-title tn-text-bold tn-text-xl tn-margin-bottom-xs">{{ $tr('填写预订时间') }}</view>
+        <view class="tn-color-gray tn-text-sm tn-margin-bottom-lg">{{ $tr('支付后会先生成预定单并进入审核，不会直接占用房间资源。') }}</view>
         
         <view class="form-item tn-margin-bottom-lg">
-          <view class="form-label tn-text-bold">{{ t('startDate') }}</view>
+          <view class="form-label tn-text-bold">{{ $tr('入住日期 (Check-in)') }}</view>
           <picker mode="date" @change="onStartDateChange">
             <view class="form-input tn-flex tn-flex-row-between tn-flex-col-center">
               <text :class="form.startDate ? 'tn-color-black tn-text-bold' : 'tn-color-gray'">
-                {{ form.startDate ? form.startDate : t('selectDate') }}
+                {{ form.startDate ? form.startDate : $tr('请选择日期') }}
               </text>
               <text class="tn-icon-calendar tn-color-black tn-text-xl"></text>
             </view>
@@ -48,11 +48,11 @@
         </view>
 
         <view class="form-item tn-margin-bottom-sm">
-          <view class="form-label tn-text-bold">{{ t('endDate') }}</view>
+          <view class="form-label tn-text-bold">{{ $tr('离开日期 (Check-out)') }}</view>
           <picker mode="date" @change="onEndDateChange" :start="form.startDate">
             <view class="form-input tn-flex tn-flex-row-between tn-flex-col-center">
               <text :class="form.endDate ? 'tn-color-black tn-text-bold' : 'tn-color-gray'">
-                {{ form.endDate ? form.endDate : t('selectDate') }}
+                {{ form.endDate ? form.endDate : $tr('请选择日期') }}
               </text>
               <text class="tn-icon-calendar tn-color-black tn-text-xl"></text>
             </view>
@@ -61,12 +61,12 @@
 
         <view v-if="stayNights > 0" class="tn-margin-top-lg booking-summary">
           <view class="summary-row tn-flex tn-flex-row-between">
-            <text class="tn-color-gray">{{ t('stayNights') }}</text>
-            <text class="tn-text-bold tn-color-black">{{ stayNights }} {{ t('nightUnit') }}</text>
+            <text class="tn-color-gray">{{ $tr('入住晚数') }}</text>
+            <text class="tn-text-bold tn-color-black">{{ stayNights }} {{ $tr('晚') }}</text>
           </view>
           <view class="summary-row tn-flex tn-flex-row-between tn-margin-top-sm">
-            <text class="tn-color-gray">{{ t('bookingStatus') }}</text>
-            <text class="tn-text-bold tn-color-black">{{ t('pendingPayment') }}</text>
+            <text class="tn-color-gray">{{ $tr('当前状态') }}</text>
+            <text class="tn-text-bold tn-color-black">{{ $tr('待支付定金') }}</text>
           </view>
         </view>
       </view>
@@ -75,11 +75,11 @@
     <!-- 底部固定按钮区 -->
     <view class="fixed-bottom-btn-area tn-flex tn-flex-row-between tn-flex-col-center">
       <view class="tn-flex tn-flex-direction-column">
-        <view class="tn-text-sm tn-color-gray">{{ t('deposit') }}</view>
+        <view class="tn-text-sm tn-color-gray">{{ $tr('定金') }}</view>
         <view class="tn-text-bold tn-text-xl" style="color: $brand-primary;">$500.00</view>
       </view>
       <view class="custom-btn btn-dark" style="width: 60%; height: 100rpx;" @click="submitBooking" :class="{ 'btn-disabled': isSubmitting }">
-        <text class="tn-text-bold tn-text-lg">{{ isSubmitting ? (language === 'zh' ? '处理中...' : 'Processing...') : t('submitOrder') }}</text>
+        <text class="tn-text-bold tn-text-lg">{{ isSubmitting ? (language === 'zh' ? '处理中...' : 'Processing...') : $tr('进入支付页') }}</text>
       </view>
     </view>
     
@@ -100,40 +100,6 @@ export default {
       form: {
         startDate: '',
         endDate: ''
-      },
-      i18n: {
-        zh: {
-          title: '预订确认',
-          bookingFor: '你正在预约',
-          deposit: '定金',
-          checkInDate: '填写预订时间',
-          checkInDesc: '支付后会先生成预定单并进入审核，不会直接占用房间资源。',
-          startDate: '入住日期 (Check-in)',
-          endDate: '离开日期 (Check-out)',
-          selectDate: '请选择日期',
-          submitOrder: '进入支付页',
-          stayNights: '入住晚数',
-          nightUnit: '晚',
-          bookingStatus: '当前状态',
-          pendingPayment: '待支付定金',
-          roomTypeLabel: '房型：'
-        },
-        en: {
-          title: 'Booking Confirm',
-          bookingFor: 'Booking For',
-          deposit: 'Deposit',
-          checkInDate: 'Booking Period',
-          checkInDesc: 'Payment will create a booking order first, without occupying room inventory.',
-          startDate: 'Check-in Date',
-          endDate: 'Check-out Date',
-          selectDate: 'Select Date',
-          submitOrder: 'Go To Payment',
-          stayNights: 'Stay Nights',
-          nightUnit: 'nights',
-          bookingStatus: 'Status',
-          pendingPayment: 'Deposit Pending',
-          roomTypeLabel: 'Room Type: '
-        }
       }
     }
   },
@@ -159,7 +125,7 @@ export default {
       const areaText = this.language === 'en'
         ? (this.applyData.roomAreaEnDisplay || compactEnglishText(this.applyData.roomAreaEn || this.applyData.roomArea || '', 28))
         : (this.applyData.roomArea || this.applyData.roomAreaEn || '')
-      return [roomTypeText ? `${this.t('roomTypeLabel')}${roomTypeText}` : '', areaText].filter(Boolean).join(' | ')
+      return [roomTypeText ? `${this.$tr('房型：')}${roomTypeText}` : '', areaText].filter(Boolean).join(' | ')
     },
     displayLocationText() {
       if (!this.applyData) {
@@ -200,9 +166,6 @@ export default {
     this.redirectIfBookingUnavailable()
   },
   methods: {
-    t(key) {
-      return this.$tm('pkgBooking.book.book', key)
-    },
     redirectIfBookingUnavailable() {
       const session = getSessionSnapshot()
       if (!session.isLogin) {