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/components/wxwork-contact.js

@@ -0,0 +1,21 @@
+export const lang = {
+	// ===== wxwork-contact component =====
+	wxworkContact: {
+		// Default button text
+		defaultBtnText: 'Add WeChat Work Customer Service',
+
+		// Confirm popup
+		popupTitle: 'Add WeChat Work Customer Service',
+		popupContent: 'After clicking confirm, you will be redirected to WeChat Work to add a professional customer service agent',
+		cancelBtn: 'Cancel',
+		confirmBtn: 'Confirm',
+
+		// Tips
+		tipTitle: 'Tip',
+		jumpSuccess: 'Jump successful',
+		jumpFailed: 'Jump failed, please check WeChat Work configuration',
+		notConfigured: 'WeChat Work customer service not configured',
+		sdkNotInitialized: 'WeChat Work SDK not initialized',
+		openProfileFailed: 'Failed to open user profile',
+	}
+}