fix: 统一使用 alipay.trade.page.pay + 支付全链路测试

- 因支付宝产品仅开通电脑网站支付，移除 mobile/desktop 切换
- 统一使用 alipay.trade.page.pay + FAST_INSTANT_TRADE_PAY
- 该接口在手机浏览器中也能跳转支付宝或显示移动端页面
- 新增 tests/payment_e2e_test.sh — 全链路支付测试脚本

src/handlers/payment.rs

@@ -187,11 +187,9 @@ fn build_alipay_form_html(
     return_url: &str,
     is_mobile: bool,  // true=手机网站支付, false=电脑网站支付
 ) -> Result<String, String> {
-    let (method, product_code) = if is_mobile {
-        ("alipay.trade.wap.pay", "QUICK_WAP_PAY")
-    } else {
-        ("alipay.trade.page.pay", "FAST_INSTANT_TRADE_PAY")
-    };
+    // 注意：当前支付宝产品仅开通了 alipay.trade.page.pay（电脑网站支付）
+    // 该接口在手机浏览器中也能正常唤起支付宝 APP 或显示移动端页面
+    let (method, product_code) = ("alipay.trade.page.pay", "FAST_INSTANT_TRADE_PAY");
 
     let biz_content = serde_json::json!({
         "out_trade_no": out_trade_no,

tests/payment_e2e_test.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+# ===== 全链路支付测试 =====
+# 运行: bash tests/payment_e2e_test.sh
+set -e
+
+BASE_URL="https://xmclassmate.top"
+echo "=========================================="
+echo "  全链路支付测试"
+echo "  环境: ${BASE_URL}"
+echo "=========================================="
+
+# Step 1: 健康检查
+echo ""
+echo "[1/5] 健康检查..."
+HEALTH=$(curl -s -o /dev/null -w "%{http_code}" ${BASE_URL}/health)
+echo "  GET /health → HTTP ${HEALTH}"
+[ "$HEALTH" = "200" ] && echo "  ✅ 通过" || { echo "  ❌ 失败"; exit 1; }
+
+# Step 2: 支付页面可访问
+echo ""
+echo "[2/5] 支付页面..."
+PAY_CODE=$(curl -s -o /dev/null -w "%{http_code}" ${BASE_URL}/payment)
+echo "  GET /payment → HTTP ${PAY_CODE}"
+[ "$PAY_CODE" = "200" ] && echo "  ✅ 通过（维护模式已关闭）" || { echo "  ❌ 失败（返回503=维护中）"; exit 1; }
+
+# Step 3: 访客登录
+echo ""
+echo "[3/5] 访客登录..."
+LOGIN_RESULT=$(curl -s -X POST ${BASE_URL}/api/guest-login)
+JWT=$(echo "$LOGIN_RESULT" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['token'])" 2>/dev/null)
+USER_ID=$(echo "$LOGIN_RESULT" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['user_id'])" 2>/dev/null)
+echo "  POST /api/guest-login → user_id=${USER_ID}"
+[ -n "$JWT" ] && echo "  ✅ JWT 获取成功" || { echo "  ❌ JWT 获取失败"; exit 1; }
+
+# Step 4: 用户信息
+echo ""
+echo "[4/5] 用户信息..."
+PROFILE=$(curl -s -H "Authorization: Bearer ${JWT}" ${BASE_URL}/api/user/profile)
+echo "  GET /api/user/profile → $(echo $PROFILE | python3 -c "import sys,json; print('is_member='+str(json.load(sys.stdin)['data']['is_member']))" 2>/dev/null)"
+
+# Step 5: 生成支付表单
+echo ""
+echo "[5/5] 支付宝支付表单..."
+RESULT=$(curl -s "${BASE_URL}/payment/page?package=monthly&jwt=${JWT}")
+
+if echo "$RESULT" | grep -q "sign"; then
+    METHOD=$(echo "$RESULT" | grep -oP '(?<=name="method" value=")[^"]+')
+    APP_ID_CHECK=$(echo "$RESULT" | grep -oP '(?<=name="app_id" value=")[^"]+')
+    GATEWAY=$(echo "$RESULT" | grep -oP '(?<=action=")[^"]+')
+    echo "  method: ${METHOD}"
+    echo "  app_id: ${APP_ID_CHECK}"
+    echo "  gateway: ${GATEWAY}"
+    echo "  ✅ 支付表单生成成功"
+elif echo "$RESULT" | grep -q "失败\|Error"; then
+    echo "  ❌ 支付表单生成失败"
+    echo "$RESULT" | grep -oP '(?<=<p[^>]*>)[^<]+' | head -3
+    exit 1
+else
+    echo "  ❌ 未知响应"
+    echo "${RESULT:0:200}"
+    exit 1
+fi
+
+echo ""
+echo "=========================================="
+echo "  全链路测试通过 ✅"
+echo "=========================================="
+echo ""
+echo "手动验证："
+echo "1. 打开 https://xmclassmate.top/payment"
+echo "2. 点击「访客登录」→ 选择套餐 → 支付"
+echo "3. 浏览器将跳转到支付宝 alipay.trade.page.pay 页面"