fix: ensure ViewOptionsWidget stays within screen bounds

- Add screen boundary checks when showing the widget
- Adjust widget position if it would appear outside screen
- Improve user experience by keeping widget fully visible

Log: fix ui issue
Bug: https://pms.uniontech.com/bug-view-286089.html

src/dfm-base/widgets/dfmwindow/filemanagerwindow.cpp

@@ -272,7 +272,10 @@ void FileManagerWindowPrivate::connectAnimationSignals()
         bool expanded = curSplitterAnimation->endValue().toInt() > 1;
         if (expanded)
             resetSideBarSize();
-        splitter->handle(1)->setEnabled(expanded);
+        // set the handle to be disabled when the side bar is collapsed
+        // because if do not disable the handle, the splitter can be dragged by pressed window left boarder.
+        if (auto handle = splitter->handle(1))
+            handle->setEnabled(expanded);
         delete curSplitterAnimation;
         curSplitterAnimation = nullptr;
     });

src/plugins/filemanager/dfmplugin-titlebar/views/titlebarwidget.cpp

@@ -438,6 +438,8 @@ bool TitleBarWidget::eventFilter(QObject *watched, QEvent *event)
         }
     }
 
+    // if the splitter is animating, do not process the resize event of tabbar
+    // otherwise, the tabbar width will be changed twice(once by the resizeEvent and once by placeholder size changed)
     if (watched == bottomBar && event->type() == QEvent::Resize) {
         if (isSplitterAnimating)
             return true;

src/plugins/filemanager/dfmplugin-titlebar/views/viewoptionswidget.cpp

@@ -16,6 +16,8 @@
 #include <QVBoxLayout>
 #include <QStandardItemModel>
 #include <QKeyEvent>
+#include <QApplication>
+#include <QScreen>
 
 DWIDGET_USE_NAMESPACE
 using namespace dfmplugin_titlebar;
@@ -290,7 +292,32 @@ void ViewOptionsWidget::exec(const QPoint &pos, DFMBASE_NAMESPACE::Global::ViewM
 {
     d->setUrl(url);
     d->switchMode(mode);
-    move(pos);
+
+    // Calculate appropriate display position to ensure widget stays within screen bounds
+    QPoint showPos = pos;
+    QRect screenRect = QApplication::screenAt(pos)->availableGeometry();
+
+    // Check right boundary
+    if (pos.x() + width() > screenRect.right()) {
+        showPos.setX(screenRect.right() - width());
+    }
+
+    // Check left boundary 
+    if (showPos.x() < screenRect.left()) {
+        showPos.setX(screenRect.left());
+    }
+
+    // Check bottom boundary
+    if (pos.y() + height() > screenRect.bottom()) {
+        showPos.setY(screenRect.bottom() - height());
+    }
+
+    // Check top boundary
+    if (showPos.y() < screenRect.top()) {
+        showPos.setY(screenRect.top());
+    }
+
+    move(showPos);
     show();
 
     QEventLoop eventLoop;