diff --git a/app/src/ui/runtime_monitor_window.cpp b/app/src/ui/runtime_monitor_window.cpp
index 1f25b13..5dda6ea 100644
--- a/app/src/ui/runtime_monitor_window.cpp
+++ b/app/src/ui/runtime_monitor_window.cpp
@@ -6,7 +6,9 @@
 #include <QWidget>
 
 RuntimeMonitorWindow::RuntimeMonitorWindow(QWidget *parent)
-    : QMainWindow(parent, Qt::Window),
+    : QMainWindow(
+          parent,
+          Qt::Window | Qt::CustomizeWindowHint | Qt::WindowTitleHint),
       ui_(std::make_unique<Ui::RuntimeMonitorWindow>())
 {
     ui_->setupUi(this);
@@ -44,10 +46,9 @@ void RuntimeMonitorWindow::closeForApplicationExit()
 
 void RuntimeMonitorWindow::closeEvent(QCloseEvent *event)
 {
-    // 运行期间关闭按钮等价于请求返回编辑态，应用退出时才真正放行关闭
+    // 运行期间禁止通过系统关闭路径离开运行界面，只允许应用退出时关闭
     if (runtime_active_ && !application_exit_)
     {
-        emit exitRequested();
         event->ignore();
         return;
     }
diff --git a/app/src/ui/runtime_monitor_window.h b/app/src/ui/runtime_monitor_window.h
index 105e031..e1e21a0 100644
--- a/app/src/ui/runtime_monitor_window.h
+++ b/app/src/ui/runtime_monitor_window.h
@@ -37,12 +37,8 @@ public:
     /** 应用退出时允许真正关闭窗口 */
     void closeForApplicationExit();
 
-signals:
-    /** 用户点击窗口关闭按钮后请求退出运行态 */
-    void exitRequested();
-
 protected:
-    /** 根据当前生命周期决定关闭是隐藏还是销毁窗口 */
+    /** 仅在应用退出时放行窗口关闭事件 */
     void closeEvent(QCloseEvent *event) override;
 
 private:
diff --git a/app/src/ui/runtime_panel_controller.cpp b/app/src/ui/runtime_panel_controller.cpp
index a7d019c..4d791e9 100644
--- a/app/src/ui/runtime_panel_controller.cpp
+++ b/app/src/ui/runtime_panel_controller.cpp
@@ -98,15 +98,6 @@ void RuntimePanelController::configure()
                     runtime_exit_requester_();
                 }
             });
-    QObject::connect(runtime_monitor_window_.get(),
-            &RuntimeMonitorWindow::exitRequested,
-            &parent_, [this]
-            {
-                if (runtime_exit_requester_)
-                {
-                    runtime_exit_requester_();
-                }
-            });
     QObject::connect(runtime_monitor_widget_->freeMonitorWidget(),
             &FreeMonitorWidget::monitorAddressesChanged,
             &parent_, [this]
diff --git a/app/tests/main_window_tests.cpp b/app/tests/main_window_tests.cpp
index 48bda9a..a7230f6 100644
--- a/app/tests/main_window_tests.cpp
+++ b/app/tests/main_window_tests.cpp
@@ -2031,12 +2031,26 @@ void testRuntimeMonitorWindowLifecycle()
     require(runtime_window->isVisible() && runtime_window->isMaximized()
                 && runtime_hmi->scene()->items().size() == 4,
             "a later runtime session must reopen and refresh the monitor window");
+
+    const Qt::WindowFlags runtime_window_flags = runtime_window->windowFlags();
+    require(!(runtime_window_flags & Qt::WindowMinimizeButtonHint)
+                && !(runtime_window_flags & Qt::WindowMaximizeButtonHint)
+                && !(runtime_window_flags & Qt::WindowCloseButtonHint),
+            "runtime monitor must not expose native window control buttons");
+
     runtime_window->close();
     QApplication::processEvents();
+    require(mode_service.mode() == ApplicationMode::OfflineRunning,
+            "closing the runtime monitor window must not leave offline running mode");
+    require(runtime_window->isVisible(),
+            "closing the runtime monitor window must not hide the runtime surface");
+
+    requiredChild<QToolButton>(window, "exitRuntimeButton")->click();
+    QApplication::processEvents();
     require(mode_service.mode() == ApplicationMode::Editing,
-            "closing the runtime monitor window must request editing mode");
+            "the runtime monitor exit button must be the editing transition");
     require(!runtime_window->isVisible(),
-            "closing the runtime monitor window must leave no visible runtime surface");
+            "the runtime monitor exit button must hide the runtime surface");
 }
 
 void testApplicationExitClosesRuntimeMonitorWindow()