feat: 微信分享钩子全页面接入 + 订阅信息结构化映射 + JWT 错误处理加强

- client: 全部页面接入 onShareAppMessage/onShareTimeline 分享钩子
- client: login 页增强、profile 订阅展示优化
- client/stores: 订阅字段扁平结构映射为 subInfo（plan/expiresAt/startDate）
- server: auth 路由 JWT 无效/过期统一返回 401 未授权响应
- server: models/tests 同步更新

client/src/stores/user.js

@@ -36,18 +36,33 @@ export const useUserStore = defineStore('user', () => {
     return data
   }
 
-  async function h5Register(email, password, nickName, verifyCode) {
-    const data = await authApi.register(email, password, nickName, verifyCode)
+  async function h5Register(email, password, nickName, verifyCode, username) {
+    const data = await authApi.register(email, password, nickName, verifyCode, username)
     token.value = data.token
     userInfo.value = data.userInfo
     uni.setStorageSync('token', data.token)
     return data
   }
 
+  // 将后端扁平的订阅字段映射为前端使用的 subInfo 结构
+  function mapSubscription(u) {
+    if (!u) return null
+    const isSub = !!u.isSubscriber
+    const expires = u.subscribeExpiry || null
+    if (!isSub && !expires) return null
+    return {
+      plan: u.subscriptionPlan || (isSub ? 'PRO' : 'free'),
+      expiresAt: expires,
+      startDate: u.subscribeStart || u.createdAt || null
+    }
+  }
+
   async function fetchMe() {
     try {
       const data = await authApi.me(token.value)
       userInfo.value = data
+      // /me 返回完整用户文档，直接派生订阅信息
+      subInfo.value = mapSubscription(data)
       return data
     } catch (err) {
       console.error('[userStore] fetchMe failed:', err)
@@ -56,14 +71,11 @@ export const useUserStore = defineStore('user', () => {
   }
 
   async function fetchSubInfo(tokenVal) {
-    // 从后端获取订阅信息 - 复用 knowledgeApi 或专门接口
-    // 当前后端无单独订阅接口，从 /api/user/progress 中获取
     const { userApi } = await import('@/utils/api')
     try {
       const progress = await userApi.progress(tokenVal)
-      if (progress && progress.subscription) {
-        subInfo.value = progress.subscription
-      }
+      const u = progress && (progress.data || progress)
+      subInfo.value = mapSubscription(u)
     } catch (err) {
       console.error('[userStore] fetchSubInfo failed:', err)
     }