feat: 增加邀请码每周使用上限并调整翻牌规则（扩展免费次数、移除赠送翻牌与翻倍提示）

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Managers/InviteCodeManager.cs

@@ -131,28 +131,35 @@ public class InviteCodeManager : DomainService
             throw new UserFriendlyException("该用户已被邀请,邀请码无效");
         }
 
-        // 检查当前用户是否已被邀请
+        // 验证本周邀请码使用次数
+        var weekStart = CardFlipManager.GetWeekStartDate(DateTime.Now);
+        var weeklyUseCount = await _invitationRecordRepository._DbQueryable
+            .Where(x => x.InvitedUserId == userId)
+            .Where(x => x.InvitationTime >= weekStart)
+            .CountAsync();
+
+        if (weeklyUseCount >= CardFlipManager.MAX_INVITE_FLIPS)
+        {
+            throw new UserFriendlyException($"本周邀请码使用次数已达上限({CardFlipManager.MAX_INVITE_FLIPS}次),请下周再来");
+        }
+
+        // 检查当前用户的邀请码信息
         var myInviteCode = await _inviteCodeRepository._DbQueryable
             .Where(x => x.UserId == userId)
             .FirstAsync();
 
-        if (myInviteCode?.IsUserInvited == true)
-        {
-            throw new UserFriendlyException("您已使用过邀请码,无法重复使用");
-        }
-
         // 标记邀请码为已使用
         inviteCodeEntity.MarkAsUsed(userId);
         await _inviteCodeRepository.UpdateAsync(inviteCodeEntity);
 
-        // 标记当前用户已被邀请
+        // 标记当前用户已被邀请(仅第一次使用邀请码时标记)
         if (myInviteCode == null)
         {
             myInviteCode = new InviteCodeAggregateRoot(userId, GenerateUniqueInviteCode());
             myInviteCode.MarkUserAsInvited();
             await _inviteCodeRepository.InsertAsync(myInviteCode);
         }
-        else
+        else if (!myInviteCode.IsUserInvited)
         {
             myInviteCode.MarkUserAsInvited();
             await _inviteCodeRepository.UpdateAsync(myInviteCode);