增加全局配置

src/main/java/xyz/playedu/api/service/AppConfigService.java

@@ -3,6 +3,8 @@ package xyz.playedu.api.service;
 import xyz.playedu.api.domain.AppConfig;
 import com.baomidou.mybatisplus.extension.service.IService;
 
+import java.util.Map;
+
 /**
 * @author tengteng
 * @description 针对表【app_config】的数据库操作Service
@@ -10,4 +12,6 @@ import com.baomidou.mybatisplus.extension.service.IService;
 */
 public interface AppConfigService extends IService<AppConfig> {
 
+    Map<String, Long> allKeys();
+
 }