初始账号：修改检查名字方法

shared/db/Role.ts

@@ -699,8 +699,8 @@ export default class Role extends BaseModel {
 
     public static async checkName(roleName: string, serverId: number) {
         if(!roleName) return true; // 不可起空字符串
-        const role: RoleType = await RoleModel.findOne({ roleName, serverId }).lean();
+        const res = await RoleModel.exists({ roleName, serverId });
-        return !!role;
+        return res;
     }
 
     // 获取战力在中位数的玩家