feat: add registration page for new miniprogram users

- New register page with chooseAvatar, nickname input (random default),
  and required phone number authorization via getPhoneNumber
- Login simplified: removed deprecated wx.getUserProfile, checks
  is_new_user flag to redirect new users to registration
- Server login response now includes is_new_user field

miniprogram/pages/login/login.js

@@ -1,15 +1,12 @@
 var app = getApp()
-var http = require('../../utils/request')
 
 Page({
   data: {
     statusBarHeight: 44,
-    loading: false,
-    userProfile: null
+    loading: false
   },
 
   onLoad: function () {
-    var app = getApp()
     this.setData({ statusBarHeight: app.globalData.statusBarHeight })
   },
 
@@ -17,73 +14,20 @@ Page({
     var self = this
     self.setData({ loading: true })
 
-    self.getWechatProfile().then(function (profile) {
-      self.setData({ userProfile: profile })
-      return app.doLogin()
-    }).then(function () {
-      return self.saveProfile()
-    }).then(function () {
+    app.doLogin().then(function (data) {
       self.setData({ loading: false })
-      wx.switchTab({ url: '/pages/index/index' })
+      if (data && data.is_new_user) {
+        wx.redirectTo({ url: '/pages/register/register' })
+      } else {
+        wx.switchTab({ url: '/pages/index/index' })
+      }
     }).catch(function (err) {
       self.setData({ loading: false })
       wx.showToast({ title: err.message || '登录失败', icon: 'none' })
     })
   },
 
-  getWechatProfile: function () {
-    return new Promise(function (resolve) {
-      if (!wx.getUserProfile) {
-        resolve(null)
-        return
-      }
-      wx.getUserProfile({
-        desc: '用于完善会员资料',
-        success: function (res) {
-          resolve(res.userInfo || null)
-        },
-        fail: function () {
-          resolve(null)
-        }
-      })
-    })
-  },
-
-  saveProfile: function () {
-    var profile = this.data.userProfile || {}
-    if (!profile.nickName && !profile.avatarUrl) return Promise.resolve()
-    return this.updateProfile({
-      nickname: profile.nickName || '',
-      avatar: profile.avatarUrl || '',
-      gender: profile.gender || 0
-    })
-  },
-
-  updateProfile: function (payload) {
-    return http.put('/api/v1/user/profile', payload).then(function () {
-      return app.loadProfile()
-    })
-  },
-
   onAgreement: function () {
     wx.showModal({ title: '提示', content: '用户协议和隐私政策内容建设中', showCancel: false })
-  },
-
-  onGetPhoneNumber: function (e) {
-    var self = this
-    if (!e.detail || !e.detail.code) {
-      wx.showToast({ title: '已跳过手机号授权', icon: 'none' })
-      return
-    }
-    self.setData({ loading: true })
-    app.doLogin().then(function () {
-      return http.post('/api/v1/user/phone', { code: e.detail.code })
-    }).then(function () {
-      self.setData({ loading: false })
-      wx.switchTab({ url: '/pages/index/index' })
-    }).catch(function (err) {
-      self.setData({ loading: false })
-      wx.showToast({ title: err.message || '手机号授权失败', icon: 'none' })
-    })
   }
 })