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/member/invite_friends.js

@@ -1,3 +1,56 @@
 export const lang = {
+	// title is the page title
 	title: 'Invite Friends',
-}
+
+	// Activity header
+	activityDescription: 'Activity Description',
+	activityTime: 'Activity Time: {startTime} to {endTime}',
+	inviteNow: 'Invite Now',
+
+	// Invite list
+	myFriends: 'My Friends',
+	cashRedPacketAmount: '{amount} yuan cash red packet',
+	pointsAmount: '{amount} points',
+	couponsAmount: '{count} coupons',
+	viewMore: 'View More',
+	noMoreData: 'No more data',
+	noInvitedFriendsTip: 'You haven\'t invited any new friends yet',
+	inviteTip: 'Invite friends and earn rewards. Give it a try~',
+
+	// Invite rewards
+	inviteRewards: 'Invite Rewards',
+	cashRedPacket: 'Cash Red Packet',
+	points: 'Points',
+	couponUnit: '',
+	coupon: 'Coupon',
+	shareDesc: 'Share with friends. When friends enter through your share link and register, you can receive the following rewards:',
+	balanceReward: 'Get {amount} yuan red packet',
+	pointReward: 'Get {amount} points',
+	couponReward: 'Get {count} coupons',
+	unlimitedReward: 'Unlimited rewards available',
+	rewardLimit: 'Reward limit: {max} people',
+
+	// Invite steps
+	howToInvite: 'How to Invite',
+	stepShareLink: 'Share link with friends',
+	stepFriendEnter: 'Friend enters',
+	stepFriendRegister: 'Friend registers and gets reward',
+
+	// Poster popup
+	saveImage: 'Save Image',
+	longPressSaveImage: 'Long press to save image',
+
+	// Share popup
+	share: 'Share',
+	shareToFriends: 'Share to Friends',
+	generatePoster: 'Generate Share Poster',
+	copyLink: 'Copy Link',
+	cancelShare: 'Cancel',
+
+	// Empty data
+	noData: 'No relevant data',
+
+	// Action tips
+	saveSuccess: 'Saved successfully',
+	saveFailed: 'Save failed, please try again later',
+}