优化提现逻辑，修正可提现金额计算方式，确保准确反映累计佣金、已提现金额和待审核金额。同时，更新小程序界面，调整可提现金额的显示和按钮状态判断，提升用户体验。

app/api/withdraw/route.ts

@@ -84,39 +84,75 @@ export async function POST(request: NextRequest) {
       })
     }
     
-    // 查询可提现金额（待结算收益）
-    let totalEarnings = 0
+    // ✅ 修正：从 orders 表查询累计佣金（与前端逻辑一致）
+    let totalCommission = 0
     try {
-      const earningsResult = await query(`
-        SELECT COALESCE(SUM(commission), 0) as total_commission
-        FROM referral_bindings
-        WHERE referrer_id = ? AND status = 'converted'
+      // 读取分成比例
+      let distributorShare = 0.9 // 默认90%
+      try {
+        const config = await getConfig('referral_config')
+        if (config?.distributorShare) {
+          distributorShare = Number(config.distributorShare)
+        }
+      } catch (e) {
+        console.warn('[Withdraw] 读取分成比例失败，使用默认值 90%')
+      }
+      
+      // 查询订单总金额
+      const ordersResult = await query(`
+        SELECT COALESCE(SUM(amount), 0) as total_amount
+        FROM orders
+        WHERE referrer_id = ? AND status = 'paid'
       `, [userId]) as any[]
-      totalEarnings = parseFloat(earningsResult[0]?.total_commission || 0)
+      
+      const totalAmount = parseFloat(ordersResult[0]?.total_amount || 0)
+      totalCommission = totalAmount * distributorShare
+      
+      console.log('[Withdraw] 佣金计算:')
+      console.log('- 订单总金额:', totalAmount)
+      console.log('- 分成比例:', distributorShare * 100 + '%')
+      console.log('- 累计佣金:', totalCommission)
     } catch (e) {
       // 如果表不存在，收益为0
-      console.log('[Withdraw] 查询收益失败，可能表不存在')
+      console.log('[Withdraw] 查询收益失败，可能表不存在:', e)
     }
     
     // 查询已提现金额
-    let withdrawnAmount = 0
+    let withdrawnEarnings = 0
     try {
-      const withdrawnResult = await query(`
-        SELECT COALESCE(SUM(amount), 0) as withdrawn
-        FROM withdrawals
-        WHERE user_id = ? AND status = 'completed'
-      `, [userId]) as any[]
-      withdrawnAmount = parseFloat(withdrawnResult[0]?.withdrawn || 0)
+      withdrawnEarnings = parseFloat(user.withdrawn_earnings) || 0
     } catch (e) {
-      // 如果表不存在，已提现为0
+      console.log('[Withdraw] 读取已提现金额失败:', e)
     }
     
-    const availableAmount = totalEarnings - withdrawnAmount
+    // 查询待审核提现金额
+    let pendingWithdrawAmount = 0
+    try {
+      const pendingResult = await query(`
+        SELECT COALESCE(SUM(amount), 0) as pending_amount
+        FROM withdrawals
+        WHERE user_id = ? AND status = 'pending'
+      `, [userId]) as any[]
+      pendingWithdrawAmount = parseFloat(pendingResult[0]?.pending_amount || 0)
+    } catch (e) {
+      console.log('[Withdraw] 查询待审核金额失败:', e)
+    }
+    
+    // ✅ 修正：可提现金额 = 累计佣金 - 已提现金额 - 待审核金额（三元素完整校验）
+    const availableAmount = totalCommission - withdrawnEarnings - pendingWithdrawAmount
+    
+    console.log('[Withdraw] 提现验证（完整版）:')
+    console.log('- 累计佣金 (totalCommission):', totalCommission)
+    console.log('- 已提现金额 (withdrawnEarnings):', withdrawnEarnings)
+    console.log('- 待审核金额 (pendingWithdrawAmount):', pendingWithdrawAmount)
+    console.log('- 可提现金额 = 累计 - 已提现 - 待审核 =', totalCommission, '-', withdrawnEarnings, '-', pendingWithdrawAmount, '=', availableAmount)
+    console.log('- 申请提现金额 (amount):', amount)
+    console.log('- 判断:', amount, '>', availableAmount, '=', amount > availableAmount)
     
     if (amount > availableAmount) {
       return NextResponse.json({ 
         success: false, 
-        message: `可提现金额不足，当前可提现 ¥${availableAmount.toFixed(2)}` 
+        message: `可提现金额不足。当前可提现 ¥${availableAmount.toFixed(2)}（累计 ¥${totalCommission.toFixed(2)} - 已提现 ¥${withdrawnEarnings.toFixed(2)} - 待审核 ¥${pendingWithdrawAmount.toFixed(2)}）` 
       })
     }
     
@@ -144,12 +180,13 @@ export async function POST(request: NextRequest) {
     
     return NextResponse.json({
       success: true,
-      message: '提现成功',
+      message: '提现申请已提交，正在审核中，通过后会自动到账您的微信零钱',
       data: {
         withdrawId,
         amount,
         account,
-        accountType: accountType === 'alipay' ? '支付宝' : '微信'
+        accountType: accountType === 'alipay' ? '支付宝' : '微信',
+        status: 'pending'
       }
     })