feat: 新用户默认昵称及个人中心加载状态修复

- 新用户注册时随机生成普拉提主题默认昵称（16 个可选）
- 修复 App 启动后个人中心首次进入不展示用户信息的 bug
  - loggedIn 改为仅依赖 token 是否存在
  - 新增 hasProfile 判断用户数据是否已加载
  - 未加载时显示骨架屏而非空白
- 抽离随机函数为可注入依赖，消除 Math.random 测试耦合

packages/server/src/auth/__tests__/auth.service.spec.ts

@@ -2,7 +2,7 @@ import { Test, TestingModule } from '@nestjs/testing'
 import { JwtService } from '@nestjs/jwt'
 import { UnauthorizedException } from '@nestjs/common'
 import { UserRole } from '@mp-pilates/shared'
-import { AuthService } from '../auth.service'
+import { AuthService, RANDOM_FN_TOKEN } from '../auth.service'
 import { WechatService } from '../wechat.service'
 import { PrismaService } from '../../prisma/prisma.service'
 
@@ -12,13 +12,14 @@ const OPENID = 'test_openid_123'
 const SESSION_KEY = 'test_session_key'
 const USER_ID = 'user-uuid-001'
 const JWT_TOKEN = 'signed.jwt.token'
+const TEST_NICKNAME = '优雅普拉提'
 
 const mockUser = {
   id: USER_ID,
   openid: OPENID,
   unionid: null,
   phone: null,
-  nickname: '',
+  nickname: TEST_NICKNAME,
   avatarUrl: null,
   role: UserRole.MEMBER,
   createdAt: new Date(),
@@ -57,6 +58,7 @@ describe('AuthService', () => {
         { provide: PrismaService, useValue: mockPrismaService },
         { provide: WechatService, useValue: mockWechatService },
         { provide: JwtService, useValue: mockJwtService },
+        { provide: RANDOM_FN_TOKEN, useValue: () => 0 }, // deterministic nickname
       ],
     }).compile()
 
@@ -89,7 +91,7 @@ describe('AuthService', () => {
         where: { openid: OPENID },
       })
       expect(mockPrismaService.user.create).toHaveBeenCalledWith({
-        data: { openid: OPENID },
+        data: { openid: OPENID, nickname: TEST_NICKNAME },
       })
       expect(result.user).toEqual(mockUser)
     })
@@ -107,7 +109,7 @@ describe('AuthService', () => {
       await authService.login(loginCode)
 
       expect(mockPrismaService.user.create).toHaveBeenCalledWith({
-        data: { openid: OPENID, unionid },
+        data: { openid: OPENID, unionid, nickname: TEST_NICKNAME },
       })
     })
 

packages/server/src/auth/auth.service.ts

@@ -1,4 +1,4 @@
-import { Injectable, UnauthorizedException } from '@nestjs/common'
+import { Inject, Injectable, UnauthorizedException } from '@nestjs/common'
 import { JwtService } from '@nestjs/jwt'
 import { User } from '@prisma/client'
 import { UserRole } from '@mp-pilates/shared'
@@ -22,12 +22,39 @@ export interface JwtPayload {
  */
 const sessionKeyStore = new Map<string, string>()
 
+export const RANDOM_FN_TOKEN = 'RANDOM_FN_TOKEN'
+
+const DEFAULT_NICKNAMES = [
+  '优雅普拉提',
+  '柔韧时光',
+  '轻盈姿态',
+  '身心合一',
+  '舒展生活',
+  '静享流动',
+  '普拉提修行者',
+  '姿态雕塑师',
+  '呼吸艺术家',
+  '柔美力量',
+  '线条雕刻师',
+  '优雅行者',
+  '轻盈韵律',
+  '内在平和',
+  '舒展之美',
+]
+
+function generateDefaultNickname(
+  randomFn: () => number = Math.random,
+): string {
+  return DEFAULT_NICKNAMES[Math.floor(randomFn() * DEFAULT_NICKNAMES.length)]
+}
+
 @Injectable()
 export class AuthService {
   constructor(
     private readonly prisma: PrismaService,
     private readonly jwtService: JwtService,
     private readonly wechatService: WechatService,
+    @Inject(RANDOM_FN_TOKEN) private readonly randomFn: () => number = Math.random,
   ) {}
 
   async login(code: string): Promise<LoginResult> {
@@ -44,6 +71,7 @@ export class AuthService {
         data: {
           openid,
           ...(unionid !== undefined && { unionid }),
+          nickname: generateDefaultNickname(this.randomFn),
         },
       }))