fix: 修复下载列表对话框中，点击某个 item 取消下载按钮后下载列表无法再次显示的问题

MainWindow::notify 中焦点判断异常，未去除 QStyleSheetStyle 导致错误认为需要隐藏下载管理对话框

Log: 判断 focusIn 事件前排除 QStyleSheetStyle 对象

src/widgets/downloadlistwidget.cpp

@@ -1,11 +1,14 @@
 #include "downloadlistwidget.h"
 #include "ui_downloadlistwidget.h"
-#include <QGraphicsOpacityEffect>
-#include <QPropertyAnimation>
-#include <QDebug>
+#include "widgets/common/downloaditem.h"
+#include "backend/sparkapi.h"
+#include "backend/downloadworker.h"
+#include "utils/utils.h"
+#include "application.h"
+
+#include <QDesktopServices>
 #include <QtConcurrent>
-
-
+#include <QDebug>
 
 DownloadListWidget::DownloadListWidget(QWidget *parent) : DBlurEffectWidget(parent),
                                                           ui(new Ui::DownloadListWidget)
@@ -118,14 +121,12 @@ void DownloadListWidget::startRequest(QUrl url, QString fileName)
     isdownload = true;
     downloaditemlist[allDownload - 1]->free = false;
 
-
     // 使用懒汉式单例来存储downloadController
     if (downloadController == nullptr)
     {
         downloadController = new DownloadController; // 并发下载，在第一次点击下载按钮的时候才会初始化
     }
 
-
     if (downloadController)
     {
         downloadController->disconnect();
@@ -139,7 +140,6 @@ void DownloadListWidget::startRequest(QUrl url, QString fileName)
     downloadController->startDownload(url.toString());
 }
 
-
 /***************************************************************
   *  @brief     下载列表完成下载的回调函数
   *  @param     
@@ -178,8 +178,6 @@ void DownloadListWidget::httpFinished() // 完成下载
             startRequest(urList.at(nowDownload - 1), fileName);
         }
     });
-    
-    
 }
 
 void DownloadListWidget::updateDataReadProgress(QString speedInfo, qint64 bytesRead, qint64 totalBytes)

src/widgets/downloadlistwidget.h

@@ -1,20 +1,19 @@
 #ifndef DOWNLOADLISTWIDGET_H
 #define DOWNLOADLISTWIDGET_H
 
+#include <DBlurEffectWidget>
+
 #include <QWidget>
 #include <QTimer>
-#include <DBlurEffectWidget>
-#include <QNetworkAccessManager>
-#include <QDesktopServices>
-#include "widgets/common/downloaditem.h"
-#include "backend/sparkapi.h"
-#include "backend/downloadworker.h"
-#include "utils/utils.h"
-DWIDGET_USE_NAMESPACE
+
 namespace Ui {
 class DownloadListWidget;
 }
 
+DWIDGET_USE_NAMESPACE
+
+class DownloadItem;
+class DownloadController;
 class DownloadListWidget : public DBlurEffectWidget
 {
     Q_OBJECT