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

pkgService/submit_request/components/FloorSelector.vue

@@ -15,17 +15,17 @@
     <tn-popup v-model="showPopup" mode="bottom" length="72%" :borderRadius="32" :closeBtn="true">
       <view class="popup-content">
         <view class="popup-header">
-          <text class="popup-title">{{ t('popupTitle') }}</text>
+          <text class="popup-title">{{ $tr('选择意向楼层') }}</text>
         </view>
 
         <scroll-view scroll-y class="floor-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('loadingText') }}</view>
+            <view class="tn-margin-top-sm tn-color-gray">{{ $tr('楼层加载中...') }}</view>
           </view>
 
           <view v-else-if="!floorList.length" class="empty-state tn-padding-xl tn-text-center">
-            <text class="tn-color-gray">{{ t('emptyText') }}</text>
+            <text class="tn-color-gray">{{ $tr('暂无可选楼层') }}</text>
           </view>
 
           <view v-else class="floor-list">
@@ -34,7 +34,7 @@
               :class="{ 'is-active': !selectedFloor }"
               @click="handleClear"
             >
-              <text class="floor-name">{{ t('clearSelection') }}</text>
+              <text class="floor-name">{{ $tr('不选择') }}</text>
               <text v-if="!selectedFloor" class="tn-icon-success-circle-fill floor-check"></text>
             </view>
             <view
@@ -133,7 +133,7 @@ export default {
       return this.$getLanguage ? this.$getLanguage() : 'zh'
     },
     placeholderText() {
-      return this.t('selectFloor')
+      return this.$tr('请选择楼层')
     }
   },
   watch: {
@@ -148,9 +148,6 @@ export default {
     this.loadData()
   },
   methods: {
-    t(key, params) {
-      return this.$tm('pkgService.submit_request.components.FloorSelector', key, params)
-    },
     handleOpen() {
       this.showPopup = true
       this.loadData()
@@ -176,7 +173,7 @@ export default {
           this.floorList = []
           this.selectedFloor = null
           uni.showToast({
-            title: this.t('loadFailed'),
+            title: this.$tr('楼层列表加载失败'),
             icon: 'none'
           })
         })