feat: 全面优化小程序界面和功能

✨ 新增功能:
- 配置后台匹配规则选择功能，支持多种匹配类型自定义
- 推广中心使用真实数据，实现H5/小程序绑定关系
- 配置MySQL数据库连接，建立完整数据表结构

🎨 界面优化:
- 优化登录状态显示，未登录只显示基础功能
- 修复推广中心等页面宽度问题，统一界面布局
- 优化设置页面绑定弹窗样式，简洁大气
- 修复目录页图标和文字对齐问题

🔧 技术改进:
- 匹配功能支持后台配置，动态加载匹配类型
- 推广数据支持API获取，本地存储作为备份
- 数据库表结构完整，支持用户、订单、推广关系
- 小程序登录仅保留微信登录方式

📱 小程序优化:
- 匹配次数调整为每日3次免费
- 支持¥1购买额外匹配次数
- 分享到朋友圈功能优化
- 界面宽度统一，卡片布局一致

miniprogram/pages/referral/referral.js

@@ -42,35 +42,56 @@ Page({
   },
 
   // 初始化数据
-  initData() {
+  async initData() {
     const { isLoggedIn, userInfo } = app.globalData
     if (isLoggedIn && userInfo) {
       // 生成邀请码
-      const referralCode = userInfo.referralCode || 'REFM' + (userInfo.id || Date.now().toString(36)).toUpperCase().slice(-6)
+      const referralCode = userInfo.referralCode || 'SOUL' + (userInfo.id || Date.now().toString(36)).toUpperCase().slice(-6)
       
-      // 模拟绑定用户数据
-      const activeBindings = [
-        { id: '1', nickname: '小明', bindingDate: '2025/12/25', daysRemaining: 5, status: 'active' },
-        { id: '2', nickname: '小红', bindingDate: '2026/1/9', daysRemaining: 20, status: 'active' },
-        { id: '3', nickname: '阿强', bindingDate: '2025/12/22', daysRemaining: 2, status: 'active' }
-      ]
+      // 尝试从API获取真实数据
+      let realData = null
+      try {
+        const res = await app.request('/api/referral/data', {
+          method: 'GET',
+          data: { userId: userInfo.id }
+        })
+        if (res.success) {
+          realData = res.data
+        }
+      } catch (e) {
+        console.log('获取推广数据失败，使用本地数据')
+      }
       
-      const convertedBindings = [
-        { id: '4', nickname: '小李', bindingDate: '2025/12/10', commission: '8.91', orderAmount: '9.90', status: 'converted' }
-      ]
+      // 使用真实数据或本地存储的数据
+      const storedBindings = wx.getStorageSync('referral_bindings') || []
+      const storedEarnings = wx.getStorageSync('referral_earnings') || { total: 0, pending: 0 }
       
-      const expiredBindings = [
-        { id: '5', nickname: '小王', bindingDate: '2025/11/15', status: 'expired' }
-      ]
+      let activeBindings, convertedBindings, expiredBindings
+      
+      if (realData) {
+        activeBindings = realData.activeBindings || []
+        convertedBindings = realData.convertedBindings || []
+        expiredBindings = realData.expiredBindings || []
+      } else if (storedBindings.length > 0) {
+        // 使用本地存储的数据
+        activeBindings = storedBindings.filter(b => b.status === 'active')
+        convertedBindings = storedBindings.filter(b => b.status === 'converted')
+        expiredBindings = storedBindings.filter(b => b.status === 'expired')
+      } else {
+        // 默认空数据
+        activeBindings = []
+        convertedBindings = []
+        expiredBindings = []
+      }
       
       const expiringCount = activeBindings.filter(b => b.daysRemaining <= 7).length
       
       this.setData({
         isLoggedIn: true,
         userInfo,
-        earnings: (userInfo.earnings || 0).toFixed(2),
-        pendingEarnings: (userInfo.pendingEarnings || 0).toFixed(2),
-        referralCount: userInfo.referralCount || 0,
+        earnings: realData?.earnings || storedEarnings.total || 0,
+        pendingEarnings: realData?.pendingEarnings || storedEarnings.pending || 0,
+        referralCount: realData?.referralCount || activeBindings.length + convertedBindings.length,
         referralCode,
         activeBindings,
         convertedBindings,
@@ -117,6 +138,23 @@ Page({
     wx.showToast({ title: '海报功能开发中', icon: 'none' })
   },
 
+  // 分享到朋友圈
+  shareToMoments() {
+    const shareText = `🔥 发现一本超棒的创业实战书《一场Soul的创业实验》！\n\n💡 62个真实商业案例，从私域运营到资源整合，干货满满！\n\n🎁 通过我的链接购买立享5%优惠，我是 ${this.data.userInfo?.nickname || '卡若'} 推荐！\n\n👉 ${this.data.referralCode} 是我的专属邀请码\n\n#创业实验 #私域运营 #商业案例`
+    
+    wx.setClipboardData({
+      data: shareText,
+      success: () => {
+        wx.showModal({
+          title: '文案已复制',
+          content: '请打开微信朋友圈，粘贴分享文案即可',
+          showCancel: false,
+          confirmText: '知道了'
+        })
+      }
+    })
+  },
+
   // 提现
   handleWithdraw() {
     const earnings = parseFloat(this.data.earnings)

miniprogram/pages/referral/referral.wxml

@@ -172,14 +172,14 @@
         <text class="share-arrow">→</text>
       </view>
       
-      <button class="share-item share-btn" open-type="share">
+      <view class="share-item" bindtap="shareToMoments">
         <view class="share-icon wechat">💬</view>
         <view class="share-info">
           <text class="share-title">分享到朋友圈</text>
           <text class="share-desc">复制文案发朋友圈</text>
         </view>
         <text class="share-arrow">→</text>
-      </button>
+      </view>
       
       <view class="share-item" bindtap="copyLink">
         <view class="share-icon link">🔗</view>