feat: 新增多语言文案与组件国际化适配

本次提交完成了大量多语言相关的新增与优化工作：
1. 新增充值、案例、会员资产、订单等页面的中文/英文翻译文案
2. 新增企业微信客服、时间选择、支付弹窗等组件的多语言包
3. 优化工具函数与自定义页面的多语言适配，替换硬编码提示文案
4. 新增会员等级规则、积分商品、退款管理等页面的国际化支持
5. 修复企业微信JS-SDK的错误提示文案硬编码问题

lang/en-us/goods/coupon_receive.js

@@ -1,4 +1,47 @@
 export const lang = {
-	//title为每个页面的标题
-	title: 'Receive Coupon'
-}
+	//title is the title of each page
+	title: 'Receive Coupon',
+
+	// ====== Coupon Info ======
+	// Discount display: {discount} off
+	discountText: '{discount}% off',
+	// Minimum spend condition: Spend {atLeast} yuan to use
+	minSpendUsage: 'Spend {atLeast} yuan to use',
+	// No threshold coupon
+	noThresholdCoupon: 'No threshold coupon',
+	// Valid until: Valid until {endTime}
+	validUntil: 'Valid until {endTime}',
+	// Valid for N days after receipt: Valid for {fixedTerm} days after receipt
+	validDaysAfterReceive: 'Valid for {fixedTerm} days after receipt',
+	// Long-term valid
+	longTermValid: 'Long-term valid',
+	// Applicable stores: Applicable stores: {storeName}
+	applicableStores: 'Applicable stores: {storeName}',
+	// Scan QR code share tip
+	scanShareTip: 'Note: Scan QR code or click top-right to share',
+
+	// ====== Button Text ======
+	receive: 'Receive',
+	// Coupon sold out
+	couponSoldOut: 'Sorry, this coupon has been fully claimed!',
+	// Activity ended
+	activityEnded: 'This coupon activity has ended!',
+	// Activity closed
+	activityClosed: 'This coupon activity has been closed',
+	// Receive limit reached
+	receiveLimitReached: 'Coupon receive limit reached!',
+
+	// ====== Toast Messages ======
+	// Merchant not enabled coupons
+	merchantNotEnabled: 'Merchant has not enabled coupons',
+	// Receive success
+	receiveSuccess: 'Successfully received',
+
+	// ====== Share Text ======
+	// Congrats money coupon: Congratulations, you got a {money} yuan coupon
+	congratsMoneyCoupon: 'Congratulations, you got a {money} yuan coupon',
+	// Congrats discount coupon: Congratulations, you got a {discount}% off coupon
+	congratsDiscountCoupon: 'Congratulations, you got a {discount}% off coupon',
+	// Minimum spend available: Available with {atLeast} yuan spend
+	minSpendAvailable: 'Available with {atLeast} yuan spend'
+}