refactor(privacy-popup): 重构隐私弹窗的国际化文案处理逻辑

修复了小程序启动早期Lang未完成初始化时$lang返回空串的问题，将文案计算移到弹窗前一次性执行，统一多平台的文案获取逻辑

components/privacy-popup/privacy-popup.vue

@@ -2,23 +2,23 @@
 	<view>
 		<view class="privacy-mask" v-if="showPop">
 			<view class="privacy-wrap">
-				<view class="privacy-title">{{ $lang('components.privacyPopup.title') }}</view>
+				<view class="privacy-title">{{ i18n.title }}</view>
 				<view class="privacy-desc">
-					{{ $lang('components.privacyPopup.descPrefix', { appName: appName }) }}
-					<text class="privacy-link" @tap="openPrivacyContract">{{ privacyContractName }}</text>
+					{{ i18n.descPrefix }}
+					<text class="privacy-link" @tap="openPrivacyContract">{{ i18n.privacyContractName }}</text>
 					<!-- #ifdef QUICKAPP-WEBVIEW || H5 || MP-HARMONY -->
-					<text class="privacy-link" @tap="openPrivacyService">{{ privacyServiceName }}</text>
+					<text class="privacy-link" @tap="openPrivacyService">{{ i18n.privacyServiceName }}</text>
 					<!-- #endif -->
-					{{ $lang('components.privacyPopup.descSuffix', { appName: appName }) }}
+					{{ i18n.descSuffix }}
 				</view>
 				<view class="privacy-button-flex">
-					<button class="privacy-button-btn bg-disagree" @tap="handleDisagree">{{ $lang('components.privacyPopup.disagreeBtn') }}</button>
+					<button class="privacy-button-btn bg-disagree" @tap="handleDisagree">{{ i18n.disagreeBtn }}</button>
 					<!-- #ifdef QUICKAPP-WEBVIEW || MP-WEIXIN -->
 					<button id="agree-btn" class="privacy-button-btn bg-agree" open-type="agreePrivacyAuthorization"
-						@agreeprivacyauthorization="handleAgree">{{ $lang('components.privacyPopup.agreeBtn') }}</button>
+						@agreeprivacyauthorization="handleAgree">{{ i18n.agreeBtn }}</button>
 					<!-- #endif -->
 					<!-- #ifdef H5 || MP-HARMONY -->
-					<button id="agree-btn" class="privacy-button-btn bg-agree" @tap="handleAgree">{{ $lang('components.privacyPopup.agreeBtn') }}</button>
+					<button id="agree-btn" class="privacy-button-btn bg-agree" @tap="handleAgree">{{ i18n.agreeBtn }}</button>
 					<!-- #endif -->
 				</view>
 			</view>
@@ -43,14 +43,23 @@ export default {
 			showPop: false,
 			privacyAuthorization: null,
 			privacyResolves: new Set(),
-			
-			privacyContractName: this.$lang('components.privacyPopup.defaultContractNameMp'),
-			appName: this.$lang('components.privacyPopup.defaultAppNameMp'),
-			// #ifdef H5 || MP-HARMONY
-			appName: this.$lang('components.privacyPopup.defaultAppNameH5'),
-			privacyContractName: this.$lang('components.privacyPopup.defaultContractNameH5'),
-			privacyServiceName: this.$lang('components.privacyPopup.defaultServiceNameH5'),
-			// #endif
+			// 平台提供的隐私协议名称(由 wx.getPrivacySetting 等异步设置)
+			// 弹窗前才参与计算 i18n.privacyContractName
+			platformContractName: '',
+			// 弹窗文案: 在 popUp() 之前由 prepareI18n() 一次性计算
+			// 关键: 不在 data() 中调 $lang(避免 boot 未完成时缓存空串)
+			// 也不在 mounted/computed 中调(method/computed 响应式不稳定)
+			// 此时 Lang.boot() 必然已完成(PrivacyManager.show() 在 await boot() 后才执行)
+			i18n: {
+				title: '',
+				descPrefix: '',
+				descSuffix: '',
+				privacyContractName: '',
+				privacyServiceName: '',
+				disagreeBtn: '',
+				agreeBtn: '',
+				disagreeTip: '',
+			},
 		}
 	},
 	mounted() {
@@ -76,7 +85,7 @@ export default {
 			// #ifdef MP-WEIXIN
 			wx.getPrivacySetting({
 				success: (res) => {
-					this.privacyContractName = res.privacyContractName
+					this.platformContractName = res.privacyContractName || ''
 				}
 			});
 			// #endif
@@ -86,7 +95,7 @@ export default {
 				has.getPrivacySetting({
 					success: (res) => {
 						if (res.privacyContractName) {
-							this.privacyContractName = res.privacyContractName
+							this.platformContractName = res.privacyContractName
 						}
 					},
 				})
@@ -101,6 +110,57 @@ export default {
 		}
 	},
 	methods: {
+		/**
+		 * 在弹窗前**一次性**计算所有 i18n 文案
+		 * 关键修复: 微信小程序首次启动时, main.js 同步 $mount() 导致 data() 求值时
+		 *   Lang.boot() 尚未完成, $lang() 返回空串; 即使 boot 完成后 emit $forceUpdate,
+		 *   data 字段不会重新求值, computed 依赖追踪也可能被压缩器优化掉。
+		 *   此方法在 popUp() 之前同步执行, 此时 Lang.boot() 必然已完成,
+		 *   一次性把 i18n 字段填好, 模板只读 data 即可, 效果与 H5 一致。
+		 */
+		prepareI18n() {
+			const $lang = this.$lang.bind(this);
+			// 应用名称(按平台取值)
+			// #ifdef H5 || MP-HARMONY
+			const appName = $lang('components.privacyPopup.defaultAppNameH5');
+			// #endif
+			// #ifndef H5 || MP-HARMONY
+			const appName = $lang('components.privacyPopup.defaultAppNameMp');
+			// #endif
+
+			// 隐私协议名称: 平台提供的优先, 否则回退 i18n 默认值
+			let privacyContractName;
+			if (this.platformContractName) {
+				privacyContractName = this.platformContractName;
+			} else {
+				// #ifdef H5 || MP-HARMONY
+				privacyContractName = $lang('components.privacyPopup.defaultContractNameH5');
+				// #endif
+				// #ifndef H5 || MP-HARMONY
+				privacyContractName = $lang('components.privacyPopup.defaultContractNameMp');
+				// #endif
+			}
+
+			// 服务协议名称(仅 H5/鸿蒙端显示)
+			// #ifdef H5 || MP-HARMONY
+			const privacyServiceName = $lang('components.privacyPopup.defaultServiceNameH5');
+			// #endif
+			// #ifndef H5 || MP-HARMONY
+			const privacyServiceName = '';
+			// #endif
+
+			this.i18n = {
+				title: $lang('components.privacyPopup.title'),
+				descPrefix: $lang('components.privacyPopup.descPrefix', { appName }),
+				descSuffix: $lang('components.privacyPopup.descSuffix', { appName }),
+				privacyContractName,
+				privacyServiceName,
+				disagreeBtn: $lang('components.privacyPopup.disagreeBtn'),
+				agreeBtn: $lang('components.privacyPopup.agreeBtn'),
+				disagreeTip: $lang('components.privacyPopup.disagreeTip'),
+			};
+		},
+
 		/**
 		 * 接收全局隐私弹窗事件
 		 * 由 App.vue → PrivacyManager.show() → uni.$emit('privacy:show') 触发
@@ -295,7 +355,7 @@ export default {
 			PrivacyManager.disagree()
 
 			uni.showModal({
-				content: this.$lang('components.privacyPopup.disagreeTip'),
+				content: this.i18n.disagreeTip,
 				success: () => {
 					this.$emit('disagree')
 				}
@@ -321,6 +381,10 @@ export default {
 		},
 
 		popUp() {
+			// 弹窗前**一次性**计算所有 i18n 文案
+			// 此时 App.vue 已 await boot() + await PrivacyManager.show() 完成,
+			// Lang.boot() 必然已完成, $lang() 返回真实翻译(效果与 H5 一致)
+			this.prepareI18n()
 			this.showPop = true;
 		},