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/contract_sign/contract_sign.vue

@@ -1,15 +1,15 @@
 <template>
   <view class="contract-sign-page tn-safe-area-inset-bottom">
     <tn-nav-bar :isBack="true" :bottomShadow="false" backgroundColor="transparent">
-      <view class="tn-text-bold tn-text-xl tn-color-black">{{ t('navTitle') }}</view>
+      <view class="tn-text-bold tn-text-xl tn-color-black">{{ $tr('合同签约') }}</view>
     </tn-nav-bar>
 
     <view class="page-main" :style="{ paddingTop: vuex_custom_bar_height + 'px' }">
       <view class="overview-panel">
         <view class="overview-header">
           <view>
-            <view class="overview-title">{{ t('overviewTitle') }}</view>
-            <view class="overview-subtitle">{{ t('contractNoLabel') }}{{ contractNo || t('notAvailable') }}</view>
+            <view class="overview-title">{{ $tr('签约前确认') }}</view>
+            <view class="overview-subtitle">{{ $tr('合同编号：') }}{{ contractNo || $tr('未获取') }}</view>
           </view>
           <view class="overview-badge">
             <text class="tn-icon-edit-write-fill"></text>
@@ -18,13 +18,13 @@
         </view>
         <view class="overview-meta">
           <text class="tn-icon-safe-fill"></text>
-          <text>{{ t('overviewMeta') }}</text>
+          <text>{{ $tr('阅读合同正文后完成签名提交，签约结果会同步到我的合同。') }}</text>
         </view>
       </view>
 
       <view v-if="loading" class="empty-panel">
-        <view class="empty-title">{{ t('loadingTitle') }}</view>
-        <view class="empty-desc">{{ t('loadingDesc') }}</view>
+        <view class="empty-title">{{ $tr('合同加载中') }}</view>
+        <view class="empty-desc">{{ $tr('正在获取合同正文，请稍候。') }}</view>
       </view>
 
       <view v-else-if="contractContent" class="preview-panel">
@@ -38,7 +38,7 @@
 
         <view class="preview-tip" @click="openFullscreenPreview">
           <text class="tn-icon-fullscreen"></text>
-          <text>{{ t('fullscreenPreview') }}</text>
+          <text>{{ $tr('点击全屏查看') }}</text>
         </view>
 
         <view class="zoom-controls" @click.stop>
@@ -56,17 +56,17 @@
         <view class="empty-icon">
           <text class="tn-icon-folder"></text>
         </view>
-        <view class="empty-title">{{ t('emptyTitle') }}</view>
-        <view class="empty-desc">{{ t('emptyDesc') }}</view>
+        <view class="empty-title">{{ $tr('暂无合同正文') }}</view>
+        <view class="empty-desc">{{ $tr('当前合同暂未返回可签约正文，请稍后再试。') }}</view>
       </view>
 
       <view v-if="contractContent" class="footer-bar">
         <view class="footer-tip">
           <text class="tn-icon-safe-fill"></text>
-          <text>{{ t('footerTip') }}</text>
+          <text>{{ $tr('签名前请确认您已完整阅读合同内容') }}</text>
         </view>
         <view class="action-btn" @click="openSignBoard">
-          {{ isSubmitting ? t('submitting') : t('signAction') }}
+          {{ isSubmitting ? $tr('提交中...') : $tr('我已阅读并同意，去签名') }}
         </view>
       </view>
     </view>
@@ -83,9 +83,9 @@
         <view class="fullscreen-header">
           <view class="fullscreen-back" @click="closeFullscreenPreview">
             <text class="tn-icon-left"></text>
-            <text>{{ t('back') }}</text>
+            <text>{{ $tr('返回') }}</text>
           </view>
-          <view class="fullscreen-title">{{ t('fullscreenTitle') }}</view>
+          <view class="fullscreen-title">{{ $tr('合同全文') }}</view>
           <view class="fullscreen-placeholder"></view>
         </view>
         <scroll-view scroll-y scroll-x class="fullscreen-scroll" :enable-flex="true">
@@ -138,54 +138,6 @@ function resolveUploadedFileUrl(uploadResult) {
 }
 
 export default {
-  i18n: {
-    zh: {
-      navTitle: '合同签约',
-      overviewTitle: '签约前确认',
-      contractNoLabel: '合同编号：',
-      notAvailable: '未获取',
-      overviewMeta: '阅读合同正文后完成签名提交，签约结果会同步到我的合同。',
-      loadingTitle: '合同加载中',
-      loadingDesc: '正在获取合同正文，请稍候。',
-      fullscreenPreview: '点击全屏查看',
-      emptyTitle: '暂无合同正文',
-      emptyDesc: '当前合同暂未返回可签约正文，请稍后再试。',
-      footerTip: '签名前请确认您已完整阅读合同内容',
-      submitting: '提交中...',
-      signAction: '我已阅读并同意，去签名',
-      back: '返回',
-      fullscreenTitle: '合同全文',
-      signerMissing: '未获取到签名人姓名',
-      contractNoMissing: '缺少合同编号',
-      signingLoading: '签约提交中...',
-      uploadFailed: '签名上传失败',
-      signSuccess: '签约成功',
-      signFailed: '签约失败'
-    },
-    en: {
-      navTitle: 'Contract Signing',
-      overviewTitle: 'Before Signing',
-      contractNoLabel: 'Contract No.: ',
-      notAvailable: 'N/A',
-      overviewMeta: 'Read the contract content before submitting your signature. The result will sync to My Contracts.',
-      loadingTitle: 'Loading contract',
-      loadingDesc: 'Fetching contract content. Please wait.',
-      fullscreenPreview: 'Open Fullscreen',
-      emptyTitle: 'No contract content',
-      emptyDesc: 'No signable contract content is available at the moment. Please try again later.',
-      footerTip: 'Please confirm that you have fully read the contract before signing',
-      submitting: 'Submitting...',
-      signAction: 'I have read and agree. Sign now',
-      back: 'Back',
-      fullscreenTitle: 'Full Contract',
-      signerMissing: 'Missing signer name',
-      contractNoMissing: 'Missing contract number',
-      signingLoading: 'Submitting contract...',
-      uploadFailed: 'Failed to upload signature',
-      signSuccess: 'Contract signed successfully',
-      signFailed: 'Failed to sign contract'
-    }
-  },
   components: {
     ContractSignDialog
   },
@@ -209,9 +161,6 @@ export default {
     this.fetchContractContent()
   },
   methods: {
-    t(key, params) {
-      return this.$tm('pkgService.contract_sign.contract_sign', key, params)
-    },
     fetchContractContent() {
       if (!this.contractNo) {
         return Promise.resolve()
@@ -238,14 +187,14 @@ export default {
       }
       if (!this.signerName) {
         uni.showToast({
-          title: this.t('signerMissing'),
+          title: this.$tr('未获取到签名人姓名'),
           icon: 'none'
         })
         return
       }
       if (!this.contractNo) {
         uni.showToast({
-          title: this.t('contractNoMissing'),
+          title: this.$tr('缺少合同编号'),
           icon: 'none'
         })
         return
@@ -307,7 +256,7 @@ export default {
 
       this.isSubmitting = true
       uni.showLoading({
-        title: this.t('signingLoading'),
+        title: this.$tr('签约提交中...'),
         mask: true
       })
 
@@ -322,7 +271,7 @@ export default {
         .then((uploadResult) => {
           const signImageUrl = resolveUploadedFileUrl(uploadResult)
           if (!signImageUrl) {
-            return Promise.reject(new Error((uploadResult && uploadResult.msg) || this.t('uploadFailed')))
+            return Promise.reject(new Error((uploadResult && uploadResult.msg) || this.$tr('签名上传失败')))
           }
 
           return contractSign({
@@ -349,7 +298,7 @@ export default {
         .then(() => {
           uni.hideLoading()
           uni.showToast({
-            title: this.t('signSuccess'),
+            title: this.$tr('签约成功'),
             icon: 'success'
           })
           setTimeout(() => {
@@ -362,7 +311,7 @@ export default {
           console.error('contract sign failed', error)
           uni.hideLoading()
           uni.showToast({
-            title: (error && (error.message || error.msg)) || this.t('signFailed'),
+            title: (error && (error.message || error.msg)) || this.$tr('签约失败'),
             icon: 'none'
           })
         })