应用详情页添加分享和请求更新按钮，设置页面添加更新客户端和清理缓存、读取缓存大小功能

src/pages/appintopage.h

@@ -5,6 +5,7 @@
 #include <QUrl>
 #include <QString>
 #include <QtConcurrent>
+#include <QClipboard>
 #include "backend/sparkapi.h"
 #include "backend/image_show.h"
 #include "widgets/downloadlistwidget.h"
@@ -29,6 +30,10 @@ private slots:
 
     void on_pushButton_3_clicked();
 
+    void on_shareButton_clicked();
+
+    void on_updateButton_clicked();
+
 private:
     QJsonObject info;
     QPixmap iconpixmap;