推广中心优化 + 用户资料功能

1. 推广中心优化：
   - 增加"待购买"、"已过期"统计
   - 访问量单独显示
   - 移除10元提现门槛，有收益即可提现
   - 复制文案去掉"专属邀请码"

2. 我的页面：
   - 支持获取微信头像（原生能力）
   - 支持获取微信昵称
   - 新增用户更新API

3. 后台API：
   - referral/data返回expiredCount和expiredUsers
   - 新增user/update接口同步用户信息

app/api/referral/data/route.ts

@@ -128,7 +128,8 @@ export async function GET(request: NextRequest) {
     // 6. 获取已转化用户列表
     const convertedBindings = await query(`
       SELECT rb.id, rb.referee_id, rb.conversion_date, rb.commission_amount,
-             u.nickname, u.avatar
+             u.nickname, u.avatar,
+             (SELECT COALESCE(SUM(amount), 0) FROM orders WHERE user_id = rb.referee_id AND status = 'paid') as order_amount
       FROM referral_bindings rb
       JOIN users u ON rb.referee_id = u.id
       WHERE rb.referrer_id = ? AND rb.status = 'converted'
@@ -136,6 +137,17 @@ export async function GET(request: NextRequest) {
       LIMIT 50
     `, [userId]) as any[]
     
+    // 6.5 获取已过期用户列表
+    const expiredBindings = await query(`
+      SELECT rb.id, rb.referee_id, rb.expiry_date, rb.binding_date,
+             u.nickname, u.avatar
+      FROM referral_bindings rb
+      JOIN users u ON rb.referee_id = u.id
+      WHERE rb.referrer_id = ? AND (rb.status = 'expired' OR (rb.status = 'active' AND rb.expiry_date <= NOW()))
+      ORDER BY rb.expiry_date DESC
+      LIMIT 50
+    `, [userId]) as any[]
+    
     // 7. 获取收益明细
     let earningsDetails: any[] = []
     try {
@@ -165,6 +177,8 @@ export async function GET(request: NextRequest) {
         visitCount: totalVisits,
         // 带来的付款人数
         paidCount: paymentStats.paidCount,
+        // 已过期用户数
+        expiredCount: bindingStats.expired,
         
         // === 收益数据 ===
         // 已结算收益
@@ -201,7 +215,8 @@ export async function GET(request: NextRequest) {
           avatar: b.avatar,
           daysRemaining: Math.max(0, b.days_remaining),
           hasFullBook: b.has_full_book,
-          bindingDate: b.binding_date
+          bindingDate: b.binding_date,
+          status: 'active'
         })),
         
         convertedUsers: convertedBindings.map((b: any) => ({
@@ -209,7 +224,19 @@ export async function GET(request: NextRequest) {
           nickname: b.nickname || '用户' + b.referee_id.slice(-4),
           avatar: b.avatar,
           commission: parseFloat(b.commission_amount) || 0,
-          conversionDate: b.conversion_date
+          orderAmount: parseFloat(b.order_amount) || 0,
+          conversionDate: b.conversion_date,
+          status: 'converted'
+        })),
+        
+        // 已过期用户列表
+        expiredUsers: expiredBindings.map((b: any) => ({
+          id: b.referee_id,
+          nickname: b.nickname || '用户' + b.referee_id.slice(-4),
+          avatar: b.avatar,
+          bindingDate: b.binding_date,
+          expiryDate: b.expiry_date,
+          status: 'expired'
         })),
         
         // === 收益明细 ===