修改关卡记录逻辑

game-server/app/util/util.ts

@@ -0,0 +1,10 @@
+
+  export function genCode(len) {
+    const chars = '123456789ABCDEFGHJKLMNPQRSTWXYZabcdefghijklmnopqrstuvwxyz';
+    const charArr = chars.split('');
+    let code = '';
+    for (let i = 0; i < len; i++) {
+      code += charArr[Math.floor(Math.random() * charArr.length)];
+    }
+    return code;
+  }