diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e5ba4a..7d27cf8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ set(GXDE_AI_SEE_SOURCES
     src/app.cpp
     src/config.cpp
     src/staging/stagingmodel.cpp
+    src/portal/portalclient.cpp
     src/ui/portalpanel.cpp
 )
 
diff --git a/docs/PLAN.md b/docs/PLAN.md
index 2bdf432..f963bab 100644
--- a/docs/PLAN.md
+++ b/docs/PLAN.md
@@ -211,6 +211,8 @@ interface org.gxde.Portal
 - 每行：复选框、缩略图/类型图标、名称、关闭按钮。
 - 选中任意复选框 → 列表上方出现「全选 / 反选 / 删除选中」；取消全不选后收起。
 - 拖动行排序（带动画），拖出到别的 App（`QDrag`），拖到传送门（原生 drop）。
+- 每行有「固定」按钮：默认拖出后**消耗**（drop 成功即从暂存区移除）；固定后拖出保留。
+  拖回暂存区或按 Esc 取消拖拽不消耗。
 
 ---
 
diff --git a/src/app.cpp b/src/app.cpp
index c02a8ef..e799b64 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -4,10 +4,12 @@
 #include "app.h"
 
 #include "config.h"
+#include "portal/portalclient.h"
 #include "staging/stagingmodel.h"
 #include "ui/portalpanel.h"
 
 #include <QLocalServer>
+#include <QTimer>
 #include <QLocalSocket>
 
 #include <unistd.h>
@@ -50,6 +52,28 @@ bool App::init(bool daemon, bool forceShow)
 
     m_model = new StagingModel(this);
 
+    PortalClient *portal = PortalClient::instance();
+    connect(portal, &PortalClient::dragStarted, this, [this](const QString &mimeTypes) {
+        if (!PortalClient::mimeInteresting(mimeTypes)) {
+            return;
+        }
+        m_dragging = true;
+        if (!m_model->isEmpty()) {
+            return;
+        }
+        QTimer::singleShot(120, this, [this]() {
+            if (m_dragging && m_model->isEmpty()) {
+                showPanel();
+            }
+        });
+    });
+    connect(portal, &PortalClient::dragEnded, this, [this]() {
+        m_dragging = false;
+        if (m_model->isEmpty() && m_panel && m_panel->isVisible()) {
+            m_panel->dismiss();
+        }
+    });
+
     connect(m_model, &StagingModel::countChanged, this, [this]() {
         if (!m_daemon && !m_model->isEmpty() && m_panel) {
             m_panel->popup();
diff --git a/src/app.h b/src/app.h
index 965e3d5..ded8ec2 100644
--- a/src/app.h
+++ b/src/app.h
@@ -35,4 +35,5 @@ private:
     PortalPanel *m_panel = nullptr;
     QLocalServer *m_server = nullptr;
     bool m_daemon = false;
+    bool m_dragging = false;
 };
diff --git a/src/portal/portalclient.cpp b/src/portal/portalclient.cpp
new file mode 100644
index 0000000..8cc9edc
--- /dev/null
+++ b/src/portal/portalclient.cpp
@@ -0,0 +1,103 @@
+// SPDX-FileCopyrightText: 2026 GXDE OS Team
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "portalclient.h"
+
+#include <QDBusConnection>
+#include <QDBusConnectionInterface>
+#include <QDBusMessage>
+#include <QStringList>
+
+namespace {
+constexpr const char *kService = "org.gxde.Portal";
+constexpr const char *kPath = "/org/gxde/Portal";
+constexpr const char *kInterface = "org.gxde.Portal";
+}
+
+PortalClient *PortalClient::instance()
+{
+    static PortalClient *self = new PortalClient;
+    return self;
+}
+
+PortalClient::PortalClient(QObject *parent)
+    : QObject(parent)
+{
+    auto bus = QDBusConnection::sessionBus();
+
+    if (auto *iface = bus.interface()) {
+        m_available = iface->isServiceRegistered(QString::fromLatin1(kService));
+        connect(iface, &QDBusConnectionInterface::serviceRegistered, this,
+                [this](const QString &name) {
+                    if (name == QString::fromLatin1(kService)) {
+                        m_available = true;
+                    }
+                });
+        connect(iface, &QDBusConnectionInterface::serviceUnregistered, this,
+                [this](const QString &name) {
+                    if (name == QString::fromLatin1(kService)) {
+                        m_available = false;
+                    }
+                });
+    }
+
+    bus.connect(QString::fromLatin1(kService), QString::fromLatin1(kPath),
+                QString::fromLatin1(kInterface), QStringLiteral("DragStarted"), this,
+                SLOT(onDragStarted(QString)));
+    bus.connect(QString::fromLatin1(kService), QString::fromLatin1(kPath),
+                QString::fromLatin1(kInterface), QStringLiteral("DragEnded"), this,
+                SLOT(onDragEnded()));
+    bus.connect(QString::fromLatin1(kService), QString::fromLatin1(kPath),
+                QString::fromLatin1(kInterface), QStringLiteral("PortalDropped"), this,
+                SLOT(onDropped(QString, bool)));
+}
+
+bool PortalClient::beginPortal()
+{
+    QDBusMessage message =
+        QDBusMessage::createMethodCall(QString::fromLatin1(kService),
+                                       QString::fromLatin1(kPath),
+                                       QString::fromLatin1(kInterface),
+                                       QStringLiteral("BeginPortal"));
+    const QDBusMessage reply = QDBusConnection::sessionBus().call(message, QDBus::Block, 500);
+    if (reply.type() != QDBusMessage::ReplyMessage || reply.arguments().isEmpty()) {
+        return false;
+    }
+    return reply.arguments().constFirst().toBool();
+}
+
+void PortalClient::cancelPortal()
+{
+    QDBusMessage message =
+        QDBusMessage::createMethodCall(QString::fromLatin1(kService),
+                                       QString::fromLatin1(kPath),
+                                       QString::fromLatin1(kInterface),
+                                       QStringLiteral("CancelPortal"));
+    QDBusConnection::sessionBus().call(message, QDBus::NoBlock);
+}
+
+bool PortalClient::mimeInteresting(const QString &mimeTypes)
+{
+    const QStringList types = mimeTypes.split(QLatin1Char(';'), Qt::SkipEmptyParts);
+    for (const QString &type : types) {
+        if (type.startsWith(QLatin1String("text/")) || type.startsWith(QLatin1String("image/"))) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void PortalClient::onDragStarted(const QString &mimeTypes)
+{
+    Q_EMIT dragStarted(mimeTypes);
+}
+
+void PortalClient::onDragEnded()
+{
+    Q_EMIT dragEnded();
+}
+
+void PortalClient::onDropped(const QString &uuid, bool accepted)
+{
+    Q_EMIT dropped(uuid, accepted);
+}
diff --git a/src/portal/portalclient.h b/src/portal/portalclient.h
new file mode 100644
index 0000000..e081ac2
--- /dev/null
+++ b/src/portal/portalclient.h
@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: 2026 GXDE OS Team
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QObject>
+
+/**
+ * Client for the compositor side "portal" (org.gxde.Portal).
+ *
+ * Start with \a beginPortal() while a drag hovers the portal zone.  The
+ * compositor opens the window overview in portal mode and forwards the drag
+ * to the window under the cursor, so the target application receives a real
+ * wl_data_device drop at the cursor position.
+ */
+class PortalClient : public QObject
+{
+    Q_OBJECT
+
+public:
+    static PortalClient *instance();
+
+    bool available() const { return m_available; }
+
+    /** @return true when the compositor opened the overview. */
+    bool beginPortal();
+    void cancelPortal();
+
+    /** Filter the drag mime types we want to react to. */
+    static bool mimeInteresting(const QString &mimeTypes);
+
+signals:
+    void dragStarted(const QString &mimeTypes);
+    void dragEnded();
+    void dropped(const QString &uuid, bool accepted);
+
+private slots:
+    void onDragStarted(const QString &mimeTypes);
+    void onDragEnded();
+    void onDropped(const QString &uuid, bool accepted);
+
+private:
+    explicit PortalClient(QObject *parent = nullptr);
+
+    bool m_available = false;
+};
diff --git a/src/staging/stagingitem.h b/src/staging/stagingitem.h
index 517c777..137db57 100644
--- a/src/staging/stagingitem.h
+++ b/src/staging/stagingitem.h
@@ -30,6 +30,7 @@ struct StagingItem
     QString text;  // full text (Text)
     QString name;  // display name
     bool checked = false;
+    bool pinned = false;
     qint64 createdAt = 0;
 
     bool exists() const;
diff --git a/src/staging/stagingmodel.cpp b/src/staging/stagingmodel.cpp
index f86e307..de36126 100644
--- a/src/staging/stagingmodel.cpp
+++ b/src/staging/stagingmodel.cpp
@@ -82,6 +82,7 @@ QJsonObject StagingItem::toJson() const
     obj.insert(QStringLiteral("text"), text);
     obj.insert(QStringLiteral("name"), name);
     obj.insert(QStringLiteral("checked"), checked);
+    obj.insert(QStringLiteral("pinned"), pinned);
     obj.insert(QStringLiteral("createdAt"), createdAt);
     return obj;
 }
@@ -95,6 +96,7 @@ StagingItem StagingItem::fromJson(const QJsonObject &obj)
     item.text = obj.value(QStringLiteral("text")).toString();
     item.name = obj.value(QStringLiteral("name")).toString();
     item.checked = obj.value(QStringLiteral("checked")).toBool();
+    item.pinned = obj.value(QStringLiteral("pinned")).toBool();
     item.createdAt = static_cast<qint64>(obj.value(QStringLiteral("createdAt")).toDouble());
     if (item.id.isEmpty()) {
         item.id = newId();
@@ -144,6 +146,8 @@ QVariant StagingModel::data(const QModelIndex &index, int role) const
         return item.text;
     case CheckedRole:
         return item.checked;
+    case PinnedRole:
+        return item.pinned;
     case ExistsRole:
         return item.exists();
     case IconRole:
@@ -302,6 +306,20 @@ void StagingModel::setChecked(int row, bool checked)
     save();
 }
 
+void StagingModel::setPinned(int row, bool pinned)
+{
+    if (row < 0 || row >= m_items.size()) {
+        return;
+    }
+    if (m_items[row].pinned == pinned) {
+        return;
+    }
+    m_items[row].pinned = pinned;
+    const QModelIndex idx = index(row);
+    Q_EMIT dataChanged(idx, idx, {PinnedRole});
+    save();
+}
+
 void StagingModel::clearAll()
 {
     if (m_items.isEmpty()) {
diff --git a/src/staging/stagingmodel.h b/src/staging/stagingmodel.h
index 056aed5..529bd89 100644
--- a/src/staging/stagingmodel.h
+++ b/src/staging/stagingmodel.h
@@ -31,6 +31,7 @@ public:
         UriRole,
         TextRole,
         CheckedRole,
+        PinnedRole,
         ExistsRole,
         IconRole,
     };
@@ -49,6 +50,7 @@ public:
     void addImage(const QImage &image, int *addedRow = nullptr);
 
     void setChecked(int row, bool checked);
+    void setPinned(int row, bool pinned);
     void clearAll();
 
     const StagingItem *itemAt(int row) const;
diff --git a/src/ui/portalpanel.cpp b/src/ui/portalpanel.cpp
index 9456f54..bf46587 100644
--- a/src/ui/portalpanel.cpp
+++ b/src/ui/portalpanel.cpp
@@ -4,6 +4,7 @@
 #include "portalpanel.h"
 
 #include "config.h"
+#include "portal/portalclient.h"
 #include "staging/stagingitem.h"
 #include "staging/stagingmodel.h"
 
@@ -57,14 +58,31 @@ QRect closeRect(const QRect &row)
     return QRect(row.right() - 36, row.center().y() - 14, 28, 28);
 }
 
+QRect pinRect(const QRect &row)
+{
+    return QRect(row.right() - 66, row.center().y() - 14, 28, 28);
+}
+
 QRect textRect(const QRect &row)
 {
     const QRect icon = iconRect(row);
-    const QRect close = closeRect(row);
-    return QRect(icon.right() + 12, row.top() + 6, close.left() - icon.right() - 20,
+    const QRect pin = pinRect(row);
+    return QRect(icon.right() + 12, row.top() + 6, pin.left() - icon.right() - 20,
                  row.height() - 12);
 }
 
+void drawPushpin(QPainter *painter, const QRect &rect, const QColor &color, bool pinned)
+{
+    painter->save();
+    painter->translate(rect.center());
+    painter->rotate(45.0);
+    painter->setPen(QPen(color, 1.5, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+    painter->setBrush(pinned ? QBrush(color) : Qt::NoBrush);
+    painter->drawRoundedRect(QRectF(-4.5, -9.0, 9.0, 7.0), 3.0, 3.0);
+    painter->drawLine(QPointF(0.0, -2.0), QPointF(0.0, 7.5));
+    painter->restore();
+}
+
 bool mimeSupported(const QMimeData *mime)
 {
     return mime && (mime->hasUrls() || mime->hasText() || mime->hasImage());
@@ -169,6 +187,13 @@ public:
         const QRect subRect(text.left(), text.top() + 24, text.width(), 16);
         painter->drawText(subRect, Qt::AlignLeft | Qt::AlignVCenter, typeLabel(index));
 
+        const bool pinned = index.data(StagingModel::PinnedRole).toBool();
+        if (pinned || hovered) {
+            drawPushpin(painter, pinRect(option.rect),
+                        pinned ? QColor(120, 180, 255, 235) : QColor(255, 255, 255, 150),
+                        pinned);
+        }
+
         if (hovered) {
             const QRect close = closeRect(option.rect).adjusted(9, 9, -9, -9);
             painter->setPen(QPen(QColor(255, 255, 255, 170), 1.7, Qt::SolidLine, Qt::RoundCap));
@@ -195,6 +220,12 @@ public:
             return true;
         }
 
+        if (pinRect(option.rect).contains(pos)) {
+            auto *staging = static_cast<StagingModel *>(model);
+            staging->setPinned(index.row(), !index.data(StagingModel::PinnedRole).toBool());
+            return true;
+        }
+
         if (closeRect(option.rect).contains(pos)) {
             model->removeRow(index.row());
             return true;
@@ -259,7 +290,8 @@ protected:
         m_pressIndex = indexAt(m_pressPos);
         if (m_pressIndex.isValid()) {
             const QRect row = visualRect(m_pressIndex);
-            if (checkRect(row).contains(m_pressPos) || closeRect(row).contains(m_pressPos)) {
+            if (checkRect(row).contains(m_pressPos) || closeRect(row).contains(m_pressPos) ||
+                pinRect(row).contains(m_pressPos)) {
                 m_pressIndex = QModelIndex();
             }
         }
@@ -289,6 +321,10 @@ protected:
 
     void dragEnterEvent(QDragEnterEvent *event) override
     {
+        if (isOwnDrag(event->mimeData())) {
+            event->ignore();
+            return;
+        }
         if (mimeSupported(event->mimeData())) {
             event->acceptProposedAction();
             return;
@@ -298,6 +334,10 @@ protected:
 
     void dragMoveEvent(QDragMoveEvent *event) override
     {
+        if (isOwnDrag(event->mimeData())) {
+            event->ignore();
+            return;
+        }
         if (mimeSupported(event->mimeData())) {
             event->acceptProposedAction();
             updateHover(event->position().toPoint());
@@ -308,7 +348,7 @@ protected:
 
     void dropEvent(QDropEvent *event) override
     {
-        if (!mimeSupported(event->mimeData())) {
+        if (isOwnDrag(event->mimeData()) || !mimeSupported(event->mimeData())) {
             event->ignore();
             return;
         }
@@ -332,6 +372,11 @@ private:
         viewport()->update();
     }
 
+    static bool isOwnDrag(const QMimeData *mime)
+    {
+        return mime && mime->hasFormat(QStringLiteral("application/x-gxde-ai-see-staging"));
+    }
+
     void startDragForIndex(const QModelIndex &index)
     {
         if (!index.isValid()) {
@@ -341,8 +386,11 @@ private:
         const int type = index.data(StagingModel::TypeRole).toInt();
         const QString uri = index.data(StagingModel::UriRole).toString();
         const QString text = index.data(StagingModel::TextRole).toString();
+        const QString id = index.data(StagingModel::IdRole).toString();
+        const bool pinned = index.data(StagingModel::PinnedRole).toBool();
 
         auto *mime = new QMimeData;
+        mime->setData(QStringLiteral("application/x-gxde-ai-see-staging"), id.toUtf8());
         if (type == StagingItem::File || type == StagingItem::Image) {
             if (!uri.isEmpty()) {
                 mime->setUrls({QUrl::fromLocalFile(uri)});
@@ -364,7 +412,24 @@ private:
         if (!icon.isNull()) {
             drag->setPixmap(icon.pixmap(48, 48));
         }
-        drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
+
+        const Qt::DropAction action =
+            drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction);
+
+        /* Dragging an item out of the staging area consumes it unless it is
+         * pinned.  A cancelled drag (Esc / dropped on nothing) keeps it. */
+        if (action != Qt::IgnoreAction && !pinned) {
+            auto *staging = qobject_cast<StagingModel *>(model());
+            if (staging) {
+                for (int row = 0; row < staging->count(); ++row) {
+                    const StagingItem *item = staging->itemAt(row);
+                    if (item && item->id == id) {
+                        staging->removeRows(row, 1);
+                        break;
+                    }
+                }
+            }
+        }
     }
 
     StagingDelegate *m_delegate = nullptr;
@@ -388,6 +453,14 @@ public:
         setAcceptDrops(true);
         setMinimumHeight(190);
 
+        m_portalTimer.setSingleShot(true);
+        m_portalTimer.setInterval(150);
+        connect(&m_portalTimer, &QTimer::timeout, this, [this]() {
+            if (m_active) {
+                Q_EMIT portalRequested();
+            }
+        });
+
         m_chatButton = new QPushButton(tr("问问小埃 →"), this);
         m_chatButton->setCursor(Qt::PointingHandCursor);
         m_chatButton->setFlat(true);
@@ -411,8 +484,19 @@ public:
         connect(&m_hintTimer, &QTimer::timeout, m_hintLabel, &QLabel::hide);
     }
 
+    void showMessage(const QString &message) { showHint(message); }
+    void setPortalActive(bool active)
+    {
+        m_portalActive = active;
+        if (!active) {
+            m_portalTimer.stop();
+        }
+    }
+
 signals:
     void chatRequested();
+    void portalRequested();
+    void portalCancelled();
 
 protected:
     void resizeEvent(QResizeEvent *event) override
@@ -486,6 +570,9 @@ protected:
         }
         m_active = true;
         update();
+        if (!m_portalActive) {
+            m_portalTimer.start();
+        }
         event->acceptProposedAction();
     }
 
@@ -501,14 +588,20 @@ protected:
         Q_UNUSED(event)
         m_active = false;
         update();
+        m_portalTimer.stop();
     }
 
     void dropEvent(QDropEvent *event) override
     {
         m_active = false;
+        m_portalTimer.stop();
         update();
+        if (!m_portalActive) {
+            showHint(tr("悬停在「传送门」上，再移动到目标窗口"));
+            event->ignore();
+            return;
+        }
         event->acceptProposedAction();
-        showHint(tr("传送门将在接入合成器后可用"));
     }
 
 private:
@@ -522,8 +615,10 @@ private:
     QPushButton *m_chatButton = nullptr;
     QLabel *m_hintLabel = nullptr;
     QTimer m_hintTimer;
+    QTimer m_portalTimer;
     bool m_active = false;
     bool m_hover = false;
+    bool m_portalActive = false;
 };
 
 /* ------------------------------------------------------------------------- */
@@ -618,6 +713,21 @@ void PortalPanel::setupUi()
     m_zone->setFixedWidth(kZoneWidth);
     outer->addWidget(m_zone);
     connect(m_zone, &PortalZone::chatRequested, this, &PortalPanel::openChatRequested);
+    connect(m_zone, &PortalZone::portalRequested, this, [this]() {
+        PortalClient *portal = PortalClient::instance();
+        if (portal->beginPortal()) {
+            m_zone->setPortalActive(true);
+            m_zone->showMessage(tr("移动到目标窗口上松手"));
+        } else {
+            m_zone->showMessage(portal->available() ? tr("当前无已打开的窗口")
+                                                    : tr("当前环境不支持传送门"));
+        }
+    });
+    connect(m_zone, &PortalZone::portalCancelled, this, []() {
+        PortalClient::instance()->cancelPortal();
+    });
+    connect(PortalClient::instance(), &PortalClient::dragEnded, this,
+            [this]() { m_zone->setPortalActive(false); });
 
     auto *right = new QVBoxLayout;
     right->setContentsMargins(0, 0, 0, 0);