解决系统字体变化时UI未能及时更新的问题

frontend/view/result-view-delegate.cpp

@@ -7,6 +7,8 @@ ResultViewDelegate::ResultViewDelegate(QObject *parent) : QStyledItemDelegate(pa
     m_textDoc(new QTextDocument(this)),
     m_hightLightEffectHelper(new HightLightEffectHelper(this))
 {
+    m_textDoc->setDefaultFont(QApplication::font());
+    connect(qApp, &QApplication::fontChanged, m_textDoc, &QTextDocument::setDefaultFont);
 }
 
 void ResultViewDelegate::setSearchKeyword(const QString &regFindKeyWords)