feat: Add debug window; accessible via Help menu and DEBUG env var

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

src/MainWindow.cpp

@@ -4,6 +4,7 @@
 #include "SketchFeature.h"
 #include "Feature.h"
 #include "ApplicationController.h"
+#include "DebugWindow.h"
 
 #include <QMenuBar>
 #include <QMenu>
@@ -19,6 +20,7 @@
 #include <QStringList>
 #include <QKeyEvent>
 #include <QApplication>
+#include <QProcessEnvironment>
 
 MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     : QMainWindow(parent)
@@ -41,6 +43,10 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     QAction *saveAsAction = fileMenu->addAction("Save &As...");
     connect(saveAsAction, &QAction::triggered, this, &MainWindow::saveAs);
 
+    QMenu *helpMenu = menuBar()->addMenu("&Help");
+    QAction *debugAction = helpMenu->addAction("&Debug");
+    connect(debugAction, &QAction::triggered, this, &MainWindow::showDebugWindow);
+
 
     QToolBar* mainToolBar = addToolBar("Main Toolbar");
     mainToolBar->setMovable(false);
@@ -151,6 +157,11 @@ MainWindow::MainWindow(ApplicationController* appController, QWidget *parent)
     connect(m_viewport, &ViewportWidget::planeSelected, m_appController, &ApplicationController::onPlaneSelected);
     connect(m_viewport, &ViewportWidget::toolDeactivated, m_appController, [this]() { m_appController->setActiveTool(ApplicationController::ToolType::None); });
 
+    m_debugWindow = new DebugWindow(this);
+    if (QProcessEnvironment::systemEnvironment().value("DEBUG") == "true") {
+        showDebugWindow();
+    }
+
     updateWindowTitle(QString());
 }
 
@@ -184,6 +195,11 @@ bool MainWindow::saveAs()
     return m_appController->saveDocumentAs();
 }
 
+void MainWindow::showDebugWindow()
+{
+    m_debugWindow->show();
+}
+
 void MainWindow::enterSketchMode()
 {
     m_tabWidget->removeTab(m_tabWidget->indexOf(m_toolsTab));