basic qt widgets support

tests/testapp/widget_test_app.cpp

@@ -0,0 +1,50 @@
+/*
+  widget_test_app.cpp — Minimal QWidget test application for GammaRay MCP widget tools.
+
+  SPDX-FileCopyrightText: 2026 The GammaRay MCP Bridge Authors
+  SPDX-License-Identifier: GPL-2.0-or-later
+*/
+
+#include <QApplication>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QLineEdit>
+#include <QCheckBox>
+#include <QGroupBox>
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    app.setApplicationName(QStringLiteral("GammaRay MCP Widget Test App"));
+
+    auto *mainWindow = new QWidget();
+    mainWindow->setWindowTitle(QStringLiteral("GammaRay Widget Test"));
+    mainWindow->resize(400, 300);
+
+    auto *layout = new QVBoxLayout(mainWindow);
+
+    auto *label = new QLabel(QStringLiteral("Hello from GammaRay MCP"));
+    layout->addWidget(label);
+
+    auto *lineEdit = new QLineEdit();
+    lineEdit->setPlaceholderText(QStringLiteral("Type something..."));
+    layout->addWidget(lineEdit);
+
+    auto *checkBox = new QCheckBox(QStringLiteral("Enable feature"));
+    checkBox->setChecked(true);
+    layout->addWidget(checkBox);
+
+    auto *groupBox = new QGroupBox(QStringLiteral("Options"));
+    auto *groupLayout = new QVBoxLayout(groupBox);
+    auto *innerCheck = new QCheckBox(QStringLiteral("Sub-option A"));
+    groupLayout->addWidget(innerCheck);
+    groupLayout->addWidget(new QCheckBox(QStringLiteral("Sub-option B")));
+    layout->addWidget(groupBox);
+
+    auto *button = new QPushButton(QStringLiteral("Click Me"));
+    layout->addWidget(button);
+
+    mainWindow->show();
+    return app.exec();
+}