feat: 新增多语言文案、优化导航及工具函数，修复部分业务逻辑

1. 新增多语言资源文件，覆盖文章、预约日期、会员信息、优惠券、表单、购物车、积分商城、分销、AI聊天等多个模块
2. 优化底部导航组件，使用多语言配置替代硬编码文案
3. 重构工具函数，新增从后端数据提取多语言文案的工具方法
4. 修复邀请好友页面的保存提示文案，替换为多语言版本
5. 修复商品SKU组件的提示文案，使用多语言配置
6. 重构AI聊天页面的帮助文档和回复模板，使用多语言配置
7. 优化空状态组件，支持多语言默认文案
8. 修复跳转逻辑，补全参数传递
9. 新增本地开发环境配置

lang/en-us/components/ns-login.js

@@ -0,0 +1,51 @@
+export const lang = {
+	// ===== ns-login component =====
+	'ns-login': {
+		// H5 bind mobile popup
+		bindMobileTitle: 'Mobile number not bound yet',
+		bindMobileTip: 'Please bind your mobile number to receive order updates',
+		mobileLabel: 'Mobile',
+		mobilePlaceholder: 'Enter mobile number',
+		captchaLabel: 'Captcha',
+		captchaPlaceholder: 'Enter captcha',
+		dynacodeLabel: 'Code',
+		dynacodePlaceholder: 'Enter code',
+		save: 'Save',
+
+		// Mini Program login popup
+		welcomeTitle: 'Welcome to {siteName}',
+		loginWithMobile: 'Login with mobile, ',
+		registerLogin: 'Register & login, ',
+		getServicesTip: 'to access orders, after-sales and more.',
+		agree: 'I agree',
+		privacyPolicy: '《Privacy Policy》',
+		userServiceAgreement: '《User Service Agreement》',
+		agreeAndAuthorizeMobile: 'Agree & Authorize Mobile',
+		authorizeMobile: 'Authorize Mobile',
+		notNow: 'Not Now',
+
+		// Nickname & Avatar
+		avatarLabel: 'Avatar',
+		nicknameLabel: 'Nickname',
+		nicknamePlaceholder: 'Enter nickname',
+		getMobile: 'Get Mobile Number',
+
+		// Dynacode
+		getDynacode: 'Get Code',
+		resendAfter: 'Resend in {seconds}s',
+
+		// Toast messages
+		pleaseConfirmAgreement: 'Please confirm the agreement',
+		uploadFailed: 'Upload failed',
+		pleaseEnterMobile: 'Please enter mobile number',
+		pleaseEnterCorrectMobile: 'Please enter correct mobile number',
+		pleaseEnterCaptcha: 'Please enter captcha',
+		pleaseEnterDynacode: 'Please enter dynamic code',
+		requestFail: 'request:fail',
+		loggingIn: 'Logging in',
+		loginFailed: 'Login failed',
+		pleaseAuthorizeMobile: 'Please authorize your mobile number',
+		pleaseEnterNickname: 'Please enter nickname',
+		avatarPullFailed: 'Avatar pull failed',
+	}
+}

lang/en-us/components/ns-newform.js

@@ -0,0 +1,33 @@
+export const lang = {
+	// ===== ns-newform component =====
+	'ns-newform': {
+		// Input placeholder defaults
+		inputPlaceholder: 'Please enter',
+		selectPlaceholder: 'Please select',
+		datePlaceholder: 'Please select date',
+		timePlaceholder: 'Please select time',
+		startDate: 'Start date',
+		endDate: 'End date',
+		startTime: 'Start time',
+		endTime: 'End time',
+		selectProvinceCity: 'Please select province and city',
+		selectProvinceCityDistrict: 'Please select province, city and district',
+
+		// Validation - required
+		pleaseInput: 'Please enter {title}',
+		pleaseSelect: 'Please select {title}',
+		pleaseSelectAtLeastOne: 'Please select at least one {title}',
+		pleaseUploadAtLeastOne: 'Please upload at least one {title}',
+
+		// Validation - format
+		idCardInvalid: 'Invalid ID card number',
+		mobileInvalid: 'Invalid mobile number',
+
+		// Validation - range
+		endDateBeforeStartDate: 'End date cannot be earlier than start date',
+		endTimeBeforeStartTime: 'End time must be later than start time',
+
+		// Image upload
+		maxUploadImages: 'Upload up to {max} images',
+	}
+}

lang/en-us/components/yuyue-date.js

@@ -0,0 +1,17 @@
+export const lang = {
+	// ===== yuyue-date component =====
+	'yuyueDate': {
+		// Appointed date button
+		appointedDate: 'Appointed Date',
+
+		// Time status text
+		fullyBooked: 'Fully Booked',
+		available: 'Available',
+
+		// Selection status
+		noSelection: 'No Selection',
+
+		// Toast message
+		weekdayCannotBook: '{weekday} cannot be booked',
+	}
+}