feat: add F1 key help support for launcher

1. Added showHelp() method in LauncherController to open manual via DBus
2. Implemented F1 key handling in both fullscreen and windowed modes
3. The help system specifically targets "启动器" (Launcher) section
4. Uses DBus interface com.deepin.Manual.Open to launch documentation
5. Added necessary DBus headers to launchercontroller.cpp

The change was made to provide quick access to launcher documentation
through standard F1 help key, improving user experience and
discoverability of launcher features.

feat: 为启动器添加F1键帮助支持

1. 在LauncherController中添加showHelp()方法通过DBus打开手册
2. 在全屏和窗口模式下实现F1键处理
3. 帮助系统专门针对"启动器"部分
4. 使用DBus接口com.deepin.Manual.Open启动文档
5. 在launchercontroller.cpp中添加必要的DBus头文件

此变更为用户提供通过标准F1帮助键快速访问启动器文档的功能，提升用户体验和
启动器功能的可发现性。
Pms: BUG-315751

Author: wjyrich

launchercontroller.cpp

@@ -11,6 +11,8 @@
 #include <DGuiApplicationHelper>
 #include <QCommandLineParser>
 #include <launcher1adaptor.h>
+#include <QDBusMessage>
+#include <QDBusConnection>
 
 #include <private/qguiapplication_p.h>
 
@@ -188,4 +190,15 @@ void LauncherController::closeAllPopups()
 void LauncherController::setAvoidHide(bool avoidHide)
 {
     m_avoidHide = avoidHide;
-}
+}
+
+void LauncherController::showHelp()
+{
+    // 由于当前只有调用 “启动器”，才能跳转到帮助文档的启动器目录。使用launcher 以及launchpad等字段，无法跳转到启动器目录。
+    QString helpTitle = "启动器";
+    
+    const QString &dmanInterface = "com.deepin.Manual.Open";
+    QDBusMessage message = QDBusMessage::createMethodCall(dmanInterface, "/com/deepin/Manual/Open", dmanInterface, "OpenTitle");
+    message << "dde" << helpTitle;
+    QDBusConnection::sessionBus().asyncCall(message);
+}

launchercontroller.h

@@ -52,6 +52,7 @@ class LauncherController : public QObject
     Q_INVOKABLE QFont adjustFontWeight(const QFont& f, QFont::Weight weight);
 
     Q_INVOKABLE void closeAllPopups();
+    Q_INVOKABLE void showHelp();
 
 signals:
     void currentFrameChanged();

qml/FullscreenFrame.qml

@@ -68,6 +68,13 @@ InputEventItem {
         focus: true
         objectName: "FullscreenFrame-BaseLayer"
 
+        Shortcut {
+            context: Qt.ApplicationShortcut
+            sequences: [StandardKey.HelpContents, "F1"]
+            onActivated: LauncherController.showHelp()
+            onActivatedAmbiguously: LauncherController.showHelp()
+        }
+
         readonly property bool isHorizontalDock: DesktopIntegration.dockPosition === Qt.UpArrow || DesktopIntegration.dockPosition === Qt.DownArrow
         readonly property int dockSpacing: (isHorizontalDock ? DesktopIntegration.dockGeometry.height : DesktopIntegration.dockGeometry.width) / Screen.devicePixelRatio
 

qml/windowed/WindowedFrame.qml

@@ -22,6 +22,13 @@ InputEventItem {
 
     KeyNavigation.tab: appGridLoader.item
 
+    Shortcut {
+        context: Qt.ApplicationShortcut
+        sequences: [StandardKey.HelpContents, "F1"]
+        onActivated: LauncherController.showHelp()
+        onActivatedAmbiguously: LauncherController.showHelp()
+    }
+
     function getHorizontalCoordinatesOfSideBar()
     {
         return sideBar.x + sideBar.width / 2