fix(panel): 暂存优先模式；工厂自身接收拖拽；去掉 drop 提示

- 暂存区非空且未拖拽时只显示暂存列表，隐藏传送门与内容工厂并收窄窗口
- 内容工厂自身区域拖入也会展开动作
- 面板矩形改用屏幕可用区 + 边距计算（layer-shell 下 mapToGlobal 不可靠）
- 离开概览只复位传送门状态，不关闭面板；125ms
- 移除“在哪里 drop”提示

src/app.cpp

@@ -88,6 +88,9 @@ bool App::init(bool daemon, bool forceShow, bool showTodo, bool showChat)
             return;
         }
         m_dragging = true;
+        if (m_panel) {
+            m_panel->setDragging(true);
+        }
         if (!m_model->isEmpty()) {
             if (m_panel && m_panel->isVisible()) {
                 m_panel->suppressPortalIfUnderCursor();
@@ -107,6 +110,7 @@ bool App::init(bool daemon, bool forceShow, bool showTodo, bool showChat)
         m_dragging = false;
         if (m_panel) {
             m_panel->stopPortalSuppression();
+            m_panel->setDragging(false);
         }
         if (m_model->isEmpty() && m_panel && m_panel->isVisible()) {
             m_panel->dismiss();

src/chat/chatwindow.cpp

@@ -1281,9 +1281,6 @@ void ChatWindow::startConversationWith(const QString &text, const QStringList &f
         }
     }
     m_input->setFocus();
-
-    m_status->setText(tr("拖到左侧空白处＝新对话，拖到左侧会话＝追加到该会话，拖到右侧对话区＝发给当前会话"));
-    m_status->show();
 }
 
 void ChatWindow::activateForAsk()

src/factory/contentfactory.cpp

@@ -317,6 +317,45 @@ void ContentFactory::paintEvent(QPaintEvent *event)
     painter.drawPath(path);
 }
 
+void ContentFactory::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (!event->mimeData() ||
+        !(event->mimeData()->hasUrls() || event->mimeData()->hasText() ||
+          event->mimeData()->hasImage())) {
+        event->ignore();
+        return;
+    }
+    Q_EMIT dragContent(event->mimeData());
+    Q_EMIT dragActivity();
+    event->acceptProposedAction();
+}
+
+void ContentFactory::dragMoveEvent(QDragMoveEvent *event)
+{
+    if (event->mimeData() &&
+        (event->mimeData()->hasUrls() || event->mimeData()->hasText() ||
+         event->mimeData()->hasImage())) {
+        Q_EMIT dragContent(event->mimeData());
+        Q_EMIT dragActivity();
+        event->acceptProposedAction();
+        return;
+    }
+    event->ignore();
+}
+
+void ContentFactory::dragLeaveEvent(QDragLeaveEvent *event)
+{
+    Q_UNUSED(event)
+    Q_EMIT dragActivity();
+}
+
+void ContentFactory::dropEvent(QDropEvent *event)
+{
+    if (event->mimeData()) {
+        event->acceptProposedAction();
+    }
+}
+
 bool ContentFactory::eventFilter(QObject *watched, QEvent *event)
 {
     if (event->type() == QEvent::DragEnter || event->type() == QEvent::DragMove) {

src/factory/contentfactory.h

@@ -33,6 +33,7 @@ signals:
     void actionRequested(const QString &id, const DropContent &content);
     void heightChanged();
     void dragActivity();
+    void dragContent(const QMimeData *mime);
     void askRequested();
     void askDropped(const QMimeData *mime);
 
@@ -42,6 +43,10 @@ public:
 protected:
     void paintEvent(QPaintEvent *event) override;
     bool eventFilter(QObject *watched, QEvent *event) override;
+    void dragEnterEvent(QDragEnterEvent *event) override;
+    void dragMoveEvent(QDragMoveEvent *event) override;
+    void dragLeaveEvent(QDragLeaveEvent *event) override;
+    void dropEvent(QDropEvent *event) override;
 
 private:
     void rebuild();

src/portal/portalclient.cpp

@@ -50,6 +50,9 @@ PortalClient::PortalClient(QObject *parent)
     bus.connect(QString::fromLatin1(kService), QString::fromLatin1(kPath),
                 QString::fromLatin1(kInterface), QStringLiteral("PortalDropped"), this,
                 SLOT(onDropped(QString, bool)));
+    bus.connect(QString::fromLatin1(kService), QString::fromLatin1(kPath),
+                QString::fromLatin1(kInterface), QStringLiteral("PortalClosed"), this,
+                SLOT(onPortalClosed()));
 }
 
 bool PortalClient::beginPortal(const QRect &panelRect)
@@ -93,6 +96,11 @@ void PortalClient::onDragStarted(const QString &mimeTypes)
     Q_EMIT dragStarted(mimeTypes);
 }
 
+void PortalClient::onPortalClosed()
+{
+    Q_EMIT portalClosed();
+}
+
 void PortalClient::onDragEnded()
 {
     Q_EMIT dragEnded();

src/portal/portalclient.h

@@ -33,11 +33,13 @@ public:
 signals:
     void dragStarted(const QString &mimeTypes);
     void dragEnded();
+    void portalClosed();
     void dropped(const QString &uuid, bool accepted);
 
 private slots:
     void onDragStarted(const QString &mimeTypes);
     void onDragEnded();
+    void onPortalClosed();
     void onDropped(const QString &uuid, bool accepted);
 
 private:

src/ui/portalpanel.cpp

@@ -784,6 +784,7 @@ PortalPanel::PortalPanel(StagingModel *model, QWidget *parent)
         if (m_countLabel) {
             m_countLabel->setText(tr("%1 项").arg(m_model->count()));
         }
+        updateMode();
         refreshLayout();
     });
     connect(m_model, &StagingModel::countChanged, m_view->viewport(),
@@ -873,7 +874,15 @@ void PortalPanel::setupUi()
 
     connect(m_zone, &PortalZone::portalRequested, this, [this]() {
         PortalClient *portal = PortalClient::instance();
-        if (portal->beginPortal(QRect(mapToGlobal(QPoint(0, 0)), size()))) {
+        QScreen *scr = screen() ? screen() : QGuiApplication::primaryScreen();
+        QRect panelRect = geometry();
+        if (scr) {
+            const QRect avail = scr->availableGeometry();
+            panelRect = QRect(avail.x() + avail.width() - width() - m_rightMargin,
+                              avail.y() + avail.height() - height() - m_bottomMargin,
+                              width(), height());
+        }
+        if (portal->beginPortal(panelRect)) {
             m_zone->setPortalActive(true);
             m_zone->showMessage(tr("移动到目标窗口上松手"));
         } else {
@@ -886,6 +895,8 @@ void PortalPanel::setupUi()
     });
     connect(PortalClient::instance(), &PortalClient::dragEnded, this,
             [this]() { m_zone->setPortalActive(false); });
+    connect(PortalClient::instance(), &PortalClient::portalClosed, this,
+            [this]() { m_zone->setPortalActive(false); });
 
     auto *right = new QVBoxLayout;
     right->setContentsMargins(0, 0, 0, 0);
@@ -990,6 +1001,7 @@ void PortalPanel::setupUi()
         Q_EMIT askWithContent(text, files);
     });
     connect(m_factory, &ContentFactory::heightChanged, this, [this]() { refreshLayout(); });
+    connect(m_factory, &ContentFactory::dragContent, this, &PortalPanel::noteDragContent);
     connect(m_factory, &ContentFactory::dragActivity, this, [this]() {
         if (m_factoryTimer) {
             m_factoryTimer->start();
@@ -1002,6 +1014,32 @@ void PortalPanel::refreshLayout()
     updateGeometryForContent();
 }
 
+void PortalPanel::setDragging(bool dragging)
+{
+    if (m_dragging == dragging) {
+        return;
+    }
+    m_dragging = dragging;
+    updateMode();
+}
+
+void PortalPanel::updateMode()
+{
+    const bool stagingOnly = !m_dragging && m_model && m_model->count() > 0;
+    if (stagingOnly == m_stagingOnly) {
+        return;
+    }
+    m_stagingOnly = stagingOnly;
+    if (m_zone) {
+        m_zone->setVisible(!stagingOnly);
+    }
+    if (m_factory) {
+        m_factory->setVisible(!stagingOnly);
+    }
+    setFixedWidth(stagingOnly ? 360 : kPanelWidth);
+    refreshLayout();
+}
+
 void PortalPanel::updateGeometryForContent()
 {
     QScreen *scr = screen();
@@ -1020,10 +1058,11 @@ void PortalPanel::updateGeometryForContent()
     const int selectionHeight = (m_selectionBar && m_selectionBar->isVisible()) ? 32 : 0;
     /* The factory always occupies the same strip, so neither the panel size nor
      * its position changes when a drag starts or ends. */
-    const int factoryHeight = m_factory ? m_factory->sizeHint().height() + 6 : 0;
+    const int factoryHeight =
+        (!m_stagingOnly && m_factory) ? m_factory->sizeHint().height() + 6 : 0;
     const int totalHeight =
         kMargin * 2 + headerHeight + 6 + selectionHeight + listHeight + factoryHeight;
-    resize(kPanelWidth, totalHeight);
+    resize(m_stagingOnly ? 360 : kPanelWidth, totalHeight);
 }
 
 void PortalPanel::noteDragContent(const QMimeData *mime)

src/ui/portalpanel.h

@@ -34,6 +34,7 @@ public:
     void refreshLayout();
     void popup();
     void suppressPortalIfUnderCursor();
+    void setDragging(bool dragging);
     void stopPortalSuppression();
     void dismiss();
 
@@ -52,6 +53,7 @@ private:
     void setupUi();
     void setupWindow();
     void updateGeometryForContent();
+    void updateMode();
     void updateSelectionBar();
     void noteDragContent(const QMimeData *mime);
     void noteDragFinished();
@@ -79,6 +81,8 @@ private:
     int m_bottomMargin = 16;
     int m_manualListHeight = 0;
     QTimer *m_suppressWatch = nullptr;
+    bool m_stagingOnly = false;
+    bool m_dragging = false;
     bool m_fixedPosition = true;
     bool m_fixedSize = false;
     int m_dragMode = 0; // 0 none, 1 move, 2 resize