chore: initialize client repository

Common/HttpHelper.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <QObject>
+#include <QNetworkAccessManager>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QJsonObject>
+#include <QJsonDocument>
+#include <QEventLoop>
+#include <QDebug>
+
+class HttpHelper
+{
+public:
+    // 每次调用独立创建manager，不做成成员变量
+    static void postRequest(const QString& url, const QJsonObject& jsonBody,
+        std::function<void(int code, const QJsonObject& resp)> callback);
+};