fix(game): 修复每日游戏接口调用路径和签名逻辑

- 在 MeiTianClient 中添加斜杠以匹配服务端路径
- 修改签名逻辑为服务端 key 加密原文本，确保与服务端保持一致

ff-game/src/main/java/com/ff/game/api/meitian/client/MeiTianClient.java

@@ -148,7 +148,7 @@ public interface MeiTianClient {
      * @param data
      * @return {@link MeiTianGameRecordDetailDTO}
      */
-    @Post("dg/player/playCheckUrl/{merchantId}/{code}/{data}")
+    @Post("/dg/player/playCheckUrl/{merchantId}/{code}/{data}")
     MeiTianGameRecordDetailDTO getGameDetail(
             @Var("merchantId") String merchantId,
             @Var("code") String code,

ff-game/src/main/java/com/ff/game/api/meitian/impl/MeiTianGameServiceImpl.java

@@ -608,12 +608,12 @@ public class MeiTianGameServiceImpl implements IGamesService {
         String rawData = JSON.toJSONString(rawMap);
         String data = null;
         try {
-            data = Base64.encode(rawData.getBytes("UTF-8"));
+            data = Base64.encode(rawData.getBytes(StandardCharsets.UTF_8));
         } catch (Exception e) {
             log.error("[MeiTian] encode rawData failure", e);
             throw new ApiException(ErrorCode.ERROR.getCode());
         }
-        String code = Md5Utils.md5New(data + key);
+        String code = Md5Utils.md5New(key + rawData);
         MeiTianGameRecordDetailDTO responseDTO = meiTianClient.getGameDetail(merchantId, code, data);
 
         //判断是否获取成功