fix 添加积分，扣除积分

src/main/java/com/tailbet/service/impl/PointsServiceImpl.java

@@ -35,10 +35,14 @@ public class PointsServiceImpl implements IPointsService {
         }
 
         Long before = user.getPoints();
-        Long after = before + amount;
 
-        user.setPoints(after);
-        userMapper.updateById(user);
+        // 原子增加积分
+        int rows = userMapper.addPoints(userId, amount);
+        if (rows == 0) {
+            throw new RuntimeException("积分增加失败");
+        }
+
+        Long after = before + amount;
 
         // 记录流水
         PointsFlow flow = new PointsFlow();
@@ -68,10 +72,14 @@ public class PointsServiceImpl implements IPointsService {
         }
 
         Long before = user.getPoints();
-        Long after = before - amount;
 
-        user.setPoints(after);
-        userMapper.updateById(user);
+        // 原子扣除积分（SQL层保证余额充足才扣）
+        int rows = userMapper.subPoints(userId, amount);
+        if (rows == 0) {
+            return false;
+        }
+
+        Long after = before - amount;
 
         // 记录流水
         PointsFlow flow = new PointsFlow();