fix: ISSUE #I6B4CS 重复安装应用的bug

应用安装过程中，重新进入应用详情页，仅通过 `dpkg-query -s $pkgName` 判断本地是否已安装，未判断当前安装任务执行状态

Log: 判断本地安装状态后，执行 isDownloading 函数判断安装任务状态，更新按钮显示状态；整理应用详情页代码

src/utils/utils.cpp

@@ -1,25 +1,24 @@
 #include "utils.h"
+#include "application.h"
 
-Utils::Utils()
-{
-}
+#include <QDBusInterface>
 
 // Author: chatGPT
-void Utils::sendNotification(QString icon, QString title, QString body)
+void Utils::sendNotification(const QString &icon, const QString &title, const QString &body)
 {
-    QDBusInterface iface("org.freedesktop.Notifications",
-                         "/org/freedesktop/Notifications",
-                         "org.freedesktop.Notifications");
+    QDBusInterface interface("org.freedesktop.Notifications",
+                             "/org/freedesktop/Notifications",
+                             "org.freedesktop.Notifications");
 
     QVariantList args;
-    args << QCoreApplication::applicationName() // the name of the application
-         << (uint)0                             // replaces the previous notification with the same ID
-         << icon                                // the application icon of the notification
-         << title                               // the title of the notification
-         << body                                // the body of the notification
-         << QStringList()                       // no actions
-         << QVariantMap()                       // no hints
-         << -1;                                 // no timeout
+    args << Application::applicationName() // the name of the application
+         << static_cast<quint32>(0)        // replaces the previous notification with the same ID
+         << icon                           // the application icon of the notification
+         << title                          // the title of the notification
+         << body                           // the body of the notification
+         << QStringList()                  // no actions
+         << QVariantMap()                  // no hints
+         << -1;                            // no timeout
 
-    iface.callWithArgumentList(QDBus::AutoDetect, "Notify", args);
+    interface.callWithArgumentList(QDBus::AutoDetect, "Notify", args);
 }

src/utils/utils.h

@@ -2,13 +2,11 @@
 #define UTILS_H
 
 #include <QObject>
-#include <QtDBus>
 
 class Utils
 {
 public:
-    Utils();
-    static void sendNotification(QString icon,QString title,QString body);
+    static void sendNotification(const QString &icon, const QString &title, const QString &body);
 };
 
 #endif // UTILS_H