feat: 小程序UI重构为Apple设计系统并添加tabBar

- 全局样式重构为Apple Design System风格
- 添加底部tabBar导航(首页/发布/历史/私信/我的)
- 更紧凑的spacing和更小的字体尺寸
- pill圆角按钮和状态标签
- Action Blue (#0066cc) 单一accent色
- 添加tabBar图标资源

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

miniprogram/pages/profile/index.js

@@ -3,6 +3,7 @@ const { request } = require('../../utils/request')
 Page({
   data: {
     loading: false,
+    user: null,
     form: {
       nickname: '',
       company: '',
@@ -17,6 +18,9 @@ Page({
   },
 
   async loadProfile() {
+    const app = getApp()
+    const user = app.globalData.user || wx.getStorageSync('user')
+    this.setData({ user })
     const profile = await request({ url: '/user/profile' })
     this.setData({
       form: {
@@ -29,6 +33,12 @@ Page({
     })
   },
 
+  goto(e) {
+    const path = e.currentTarget.dataset.path
+    if (!path) return
+    wx.navigateTo({ url: path })
+  },
+
   onInput(e) {
     const field = e.currentTarget.dataset.field
     this.setData({ [`form.${field}`]: (e.detail.value || '').trim() })
@@ -57,5 +67,18 @@ Page({
     } finally {
       this.setData({ loading: false })
     }
+  },
+
+  logout() {
+    wx.showModal({
+      title: '退出登录',
+      content: '确定要退出登录吗？',
+      success: (res) => {
+        if (res.confirm) {
+          getApp().clearAuth()
+          wx.reLaunch({ url: '/pages/login/index' })
+        }
+      }
+    })
   }
 })