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

server/src/models/Trend.js

@@ -4,6 +4,7 @@ const { Schema } = mongoose;
 const TrendSchema = new Schema({
   title: { type: String, required: true, trim: true },
   summary: { type: String },
+  body: { type: String },
   source: { type: String, default: '未知来源' },
   sourceUrl: { type: String },
   category: {

server/src/models/User.js

@@ -94,11 +94,11 @@ const UserSchema = new Schema({
   dim4Score: { type: Number, default: 0 },
   dim5Score: { type: Number, default: 0 },
   
-  // 已解锁维度
-  unlockedDims: [{ 
-    type: Number, 
-    enum: [1, 2, 3, 4, 5] 
-  }],
+  // 已解锁维度（新用户默认解锁第1维度）
+  unlockedDims: {
+    type: [{ type: Number, enum: [1, 2, 3, 4, 5] }],
+    default: [1]
+  },
   
   // 商品相关
   ownedSkins: [{ 

server/src/models/VerificationCode.js

@@ -4,7 +4,7 @@ const { Schema } = mongoose
 const VerificationCodeSchema = new Schema({
   email: { type: String, required: true, index: true },
   code: { type: String, required: true },
-  expiresAt: { type: Date, required: true, index: true },
+  expiresAt: { type: Date, required: true },
   used: { type: Boolean, default: false },
   createdAt: { type: Date, default: Date.now }
 })