Fix top border & misc tweaks (#167)

Yuhang Zhao

2025-03-04 1d08c8b1144a62887a2b73903eef4129dc9be207

 src/core/contexts/qtwindowcontext.cpp

@@ -219,8 +219,10 @@

            case QEvent::MouseButtonDblClick: {
                if (me->button() == Qt::LeftButton && inTitleBar && !fixedSize) {
                    Qt::WindowFlags windowFlags = delegate->getWindowFlags(host);
                    Qt::WindowStates windowState = delegate->getWindowState(host);
                    if (!(windowState & Qt::WindowFullScreen)) {
                    if ((windowFlags & Qt::WindowMaximizeButtonHint) &&
                        !(windowState & Qt::WindowFullScreen)) {
                        if (windowState & Qt::WindowMaximized) {
                            delegate->setWindowState(host, windowState & ~Qt::WindowMaximized);
                        } else {