diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index dff8680..2215046 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -21,7 +21,8 @@ add_executable(geopro_desktop WIN32
   PanelHeader.cpp
   login/LoginWindow.cpp
   panels/AnomalyListPanel.cpp
-  panels/DatasetListPanel.cpp)
+  panels/DatasetListPanel.cpp
+  panels/ObjectTreePanel.cpp)
 
 target_include_directories(geopro_desktop PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
 
@@ -34,6 +35,7 @@ target_link_libraries(geopro_desktop PRIVATE
   geopro_data        # Phase 2：本地样本仓储（对象树 / 网格 / 色阶）
   geopro_net         # Phase 3：登录（验证码 + RSA + login2）
   geopro_render      # Phase 4：render 层（Scene / GridContourActor / 相机预设）
+  geopro_controller  # Phase 5：导航编排（WorkbenchNavController）
 )
 
 vtk_module_autoinit(TARGETS geopro_desktop MODULES ${VTK_LIBRARIES})
diff --git a/src/app/panels/ObjectTreePanel.cpp b/src/app/panels/ObjectTreePanel.cpp
new file mode 100644
index 0000000..39aabe6
--- /dev/null
+++ b/src/app/panels/ObjectTreePanel.cpp
@@ -0,0 +1,95 @@
+#include "panels/ObjectTreePanel.hpp"
+
+#include <QColor>
+#include <QLabel>
+#include <QSignalBlocker>
+#include <QTreeWidget>
+#include <QTreeWidgetItem>
+#include <QVBoxLayout>
+
+#include "Glyphs.hpp"
+#include "dto/NavDto.hpp"
+
+namespace geopro::app {
+
+namespace {
+// TM 节点把 tmObjectId 存在该角色；GS/项目根节点为空。
+constexpr int kRoleTmId = Qt::UserRole + 2;
+
+void addNodes(QTreeWidgetItem* parent, const std::vector<data::dto::StructTreeNode>& nodes) {
+    for (const auto& n : nodes) {
+        auto* item = new QTreeWidgetItem(parent);
+        item->setText(0, QString::fromStdString(n.node.name));
+        if (n.isTm) {
+            item->setData(0, kRoleTmId, QString::fromStdString(n.node.id));
+            item->setFlags(item->flags() | Qt::ItemIsUserCheckable);
+            item->setCheckState(0, Qt::Unchecked);  // 真实数据渲染下一轮接入，默认不勾
+        }
+        addNodes(item, n.children);
+    }
+}
+}  // namespace
+
+ObjectTreePanel::ObjectTreePanel(QWidget* parent) : QWidget(parent) {
+    auto* lay = new QVBoxLayout(this);
+    lay->setContentsMargins(0, 0, 0, 0);
+    lay->setSpacing(0);
+
+    tree_ = new QTreeWidget(this);
+    tree_->setHeaderHidden(true);
+    {
+        const QString openArrow = writeChevronIcon(true, QColor("#8A93A3"));
+        const QString closedArrow = writeChevronIcon(false, QColor("#8A93A3"));
+        tree_->setStyleSheet(
+            QStringLiteral("QTreeView::branch { background: #FFFFFF; }"
+                           "QTreeView::branch:has-children:!has-siblings:closed,"
+                           "QTreeView::branch:closed:has-children:has-siblings { image: url(%1); }"
+                           "QTreeView::branch:open:has-children:!has-siblings,"
+                           "QTreeView::branch:open:has-children:has-siblings { image: url(%2); }")
+                .arg(closedArrow, openArrow));
+    }
+    lay->addWidget(tree_, 1);
+
+    hint_ = new QLabel(QStringLiteral("（加载中…）"), this);
+    hint_->setAlignment(Qt::AlignCenter);
+    hint_->setStyleSheet(QStringLiteral("color:#9AA6B6; padding:16px;"));
+    hint_->setVisible(false);
+    lay->addWidget(hint_);
+
+    QObject::connect(tree_, &QTreeWidget::itemClicked, this, [this](QTreeWidgetItem* item, int) {
+        const QString tmId = item->data(0, kRoleTmId).toString();
+        if (!tmId.isEmpty()) emit tmClicked(tmId);
+    });
+    QObject::connect(tree_, &QTreeWidget::itemChanged, this, [this](QTreeWidgetItem* item, int) {
+        const QString tmId = item->data(0, kRoleTmId).toString();
+        if (!tmId.isEmpty())
+            emit tmCheckToggled(tmId, item->checkState(0) == Qt::Checked);
+    });
+}
+
+void ObjectTreePanel::setStructure(const QString& projectName,
+                                   const std::vector<data::StructNode>& nodes) {
+    const QSignalBlocker block(tree_);  // 重建触发 itemChanged，先屏蔽
+    tree_->clear();
+    const auto roots = data::dto::buildStructTree(nodes);
+    if (roots.empty()) {
+        showMessage(projectName.isEmpty() ? QStringLiteral("（暂无项目）")
+                                          : QStringLiteral("（该项目暂无结构）"));
+        return;
+    }
+    hint_->setVisible(false);
+    tree_->setVisible(true);
+    auto* rootItem = new QTreeWidgetItem(tree_);
+    rootItem->setText(0, projectName.isEmpty() ? QStringLiteral("项目") : projectName);
+    addNodes(rootItem, roots);
+    tree_->expandAll();
+}
+
+void ObjectTreePanel::showMessage(const QString& message) {
+    tree_->clear();
+    tree_->setVisible(false);
+    hint_->setText(message);
+    hint_->setVisible(true);
+}
+
+}  // namespace geopro::app
diff --git a/src/app/panels/ObjectTreePanel.hpp b/src/app/panels/ObjectTreePanel.hpp
new file mode 100644
index 0000000..58d54a8
--- /dev/null
+++ b/src/app/panels/ObjectTreePanel.hpp
@@ -0,0 +1,30 @@
+#pragma once
+#include <QWidget>
+#include <vector>
+#include "repo/RepoTypes.hpp"
+
+class QTreeWidget;
+class QLabel;
+
+namespace geopro::app {
+
+// 被动对象树：项目根 → GS → TM（叶子=TM，可勾选）。数据来自控制器；自身不发请求。
+class ObjectTreePanel : public QWidget {
+    Q_OBJECT
+public:
+    explicit ObjectTreePanel(QWidget* parent = nullptr);
+
+    // 用扁平结构节点重建树（内部调 dto::buildStructTree）。
+    void setStructure(const QString& projectName, const std::vector<data::StructNode>& nodes);
+    void showMessage(const QString& message);  // 错误/空状态占位
+
+signals:
+    void tmClicked(const QString& tmObjectId);
+    void tmCheckToggled(const QString& tmObjectId, bool checked);
+
+private:
+    QTreeWidget* tree_ = nullptr;
+    QLabel* hint_ = nullptr;
+};
+
+}  // namespace geopro::app