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

pkgAccount/login/login.vue

@@ -8,20 +8,20 @@
       
       <!-- 页面头部大标题 -->
       <view class="page-header tn-margin-bottom-xl tn-margin-top-xl fade-in">
-        <view class="tn-text-bold tn-color-black title-text">{{ t('pageTitle') }}</view>
-        <view class="tn-color-gray tn-text-sm tn-margin-top-sm subtitle-text">{{ t('pageDesc') }}</view>
+        <view class="tn-text-bold tn-color-black title-text">{{ $tr('欢迎回来') }}</view>
+        <view class="tn-color-gray tn-text-sm tn-margin-top-sm subtitle-text">{{ $tr('登录绿居公寓，探索您的国际化青年社区') }}</view>
       </view>
 
       <!-- 登录表单 -->
       <view class="form-area tn-margin-top-xl fade-in-up">
         <view class="form-item tn-margin-bottom-lg">
-          <view class="form-label tn-text-bold tn-margin-bottom-sm">{{ t('accountLabel') }}</view>
+          <view class="form-label tn-text-bold tn-margin-bottom-sm">{{ $tr('账号 / 邮箱') }}</view>
           <view class="input-wrapper" :class="{ 'is-focused': accountFocused }">
             <text class="tn-icon-my input-icon"></text>
-            <input 
-              class="form-input" 
-              :placeholder="t('accountPlaceholder')" 
-              placeholder-class="input-placeholder" 
+            <input
+              class="form-input"
+              :placeholder="$tr('请输入账号或邮箱')"
+              placeholder-class="input-placeholder"
               v-model="form.account"
               @focus="accountFocused = true"
               @blur="accountFocused = false"
@@ -30,13 +30,13 @@
         </view>
 
         <view class="form-item tn-margin-bottom-xl">
-          <view class="form-label tn-text-bold tn-margin-bottom-sm">{{ t('passwordLabel') }}</view>
+          <view class="form-label tn-text-bold tn-margin-bottom-sm">{{ $tr('密码') }}</view>
           <view class="input-wrapper" :class="{ 'is-focused': passwordFocused }">
             <text class="tn-icon-lock input-icon"></text>
             <input 
               class="form-input" 
               type="password" 
-              :placeholder="t('passwordPlaceholder')" 
+              :placeholder="$tr('请输入密码')"
               placeholder-class="input-placeholder" 
               v-model="form.password"
               @focus="passwordFocused = true"
@@ -50,22 +50,22 @@
       <view class="action-area tn-margin-top-xxl fade-in-up" style="animation-delay: 0.2s;">
         <view class="custom-btn btn-primary" @click="handleLogin" :class="{ 'btn-disabled': isSubmitting }">
           <text v-if="isSubmitting" class="tn-icon-loading tn-margin-right-xs spin"></text>
-          <text class="tn-text-bold tn-text-lg">{{ isSubmitting ? t('submitting') : t('submitLogin') }}</text>
+          <text class="tn-text-bold tn-text-lg">{{ isSubmitting ? $tr('登录中...') : $tr('立即登录') }}</text>
         </view>
 
         <view class="secondary-entry-card tn-margin-top-lg" @click="goToRegistrationRecords">
           <view class="tn-flex tn-flex-row-between tn-flex-col-center">
             <view>
-              <view class="secondary-entry-title">{{ t('viewRegistrationRecords') }}</view>
-              <view class="secondary-entry-desc tn-margin-top-xs">{{ t('viewRegistrationRecordsDesc') }}</view>
+              <view class="secondary-entry-title">{{ $tr('查看注册记录') }}</view>
+              <view class="secondary-entry-desc tn-margin-top-xs">{{ $tr('未登录也可查看当前微信账号提交的注册申请记录') }}</view>
             </view>
             <text class="tn-icon-right secondary-entry-arrow"></text>
           </view>
         </view>
         
         <view class="tn-flex tn-flex-row-center tn-margin-top-xl">
-          <view class="tn-color-gray tn-text-sm">{{ t('noAccount') }}</view>
-          <view class="tn-color-black tn-text-bold tn-text-sm tn-margin-left-xs register-link" @click="goToRegister">{{ t('goRegister') }}</view>
+          <view class="tn-color-gray tn-text-sm">{{ $tr('还没有账号？') }}</view>
+          <view class="tn-color-black tn-text-bold tn-text-sm tn-margin-left-xs register-link" @click="goToRegister">{{ $tr('去注册') }}</view>
         </view>
       </view>
 
@@ -96,44 +96,6 @@ export default {
       form: {
         account: '',
         password: ''
-      },
-      i18n: {
-        zh: {
-          pageTitle: '欢迎回来',
-          pageDesc: '登录绿居公寓，探索您的国际化青年社区',
-          accountLabel: '账号 / 邮箱',
-          accountPlaceholder: '请输入账号或邮箱',
-          passwordLabel: '密码',
-          passwordPlaceholder: '请输入密码',
-          submitting: '登录中...',
-          submitLogin: '立即登录',
-          viewRegistrationRecords: '查看注册记录',
-          viewRegistrationRecordsDesc: '未登录也可查看当前微信账号提交的注册申请记录',
-          noAccount: '还没有账号？',
-          goRegister: '去注册',
-          loading: '加载中...',
-          validateRequired: '请输入账号和密码',
-          loginSuccess: '登录成功',
-          loginFailed: '登录失败，请稍后重试'
-        },
-        en: {
-          pageTitle: 'Welcome Back',
-          pageDesc: 'Sign in to Luju Apartments and explore your international youth community.',
-          accountLabel: 'Account / Email',
-          accountPlaceholder: 'Enter account or email',
-          passwordLabel: 'Password',
-          passwordPlaceholder: 'Enter password',
-          submitting: 'Signing In...',
-          submitLogin: 'Sign In',
-          viewRegistrationRecords: 'View Registration Records',
-          viewRegistrationRecordsDesc: 'You can review registration records submitted by this Wechat account even without signing in.',
-          noAccount: 'No account yet?',
-          goRegister: 'Register',
-          loading: 'Loading...',
-          validateRequired: 'Please enter both account and password',
-          loginSuccess: 'Signed in successfully',
-          loginFailed: 'Sign-in failed, please try again later'
-        }
       }
     }
   },
@@ -143,9 +105,6 @@ export default {
     await this.checkPendingRegistration(bypass)
   },
   methods: {
-    t(key) {
-      return this.$tm('pkgAccount.login.login', key)
-    },
     normalizeRedirectUrl(value = '') {
       if (!value) {
         return ''
@@ -192,7 +151,7 @@ export default {
       })
     },
     async checkPendingRegistration(bypassRedirect = false) {
-      uni.showLoading({ title: this.t('loading') })
+      uni.showLoading({ title: this.$tr('加载中...') })
       try {
         const providerValue = await this.getWechatCode()
         if (!providerValue) {
@@ -229,7 +188,7 @@ export default {
       }
 
       uni.showToast({
-        title: this.t('validateRequired'),
+        title: this.$tr('请输入账号和密码'),
         icon: 'none'
       })
       return false
@@ -361,7 +320,7 @@ export default {
 
       uni.hideLoading()
       uni.showToast({
-        title: this.t('loginSuccess'),
+        title: this.$tr('登录成功'),
         icon: 'success'
       })
       setTimeout(() => {
@@ -375,7 +334,7 @@ export default {
       }
 
       this.isSubmitting = true
-      uni.showLoading({ title: this.t('submitting') })
+      uni.showLoading({ title: this.$tr('登录中...') })
 
       return this.resolveLoginState()
         .then(loginState => {
@@ -390,7 +349,7 @@ export default {
           uni.hideLoading()
           this.isSubmitting = false
           uni.showToast({
-            title: this.t('loginFailed'),
+            title: this.$tr('登录失败，请稍后重试'),
             icon: 'none'
           })
         })