Method testRemoveAndUndoNode

tests/test_context_menu.cpp:266–280

    // ── Remove node then undo restores it ──

    void testRemoveAndUndoNode() {
        int flagsIdx = findNode("flags");
        QVERIFY(flagsIdx >= 0);
        int before = countNodes();

        m_ctrl->removeNode(flagsIdx);
        QApplication::processEvents();
        QCOMPARE(countNodes(), before - 1);
        QCOMPARE(findNode("flags"), -1);

        m_doc->undoStack.undo();
        QApplication::processEvents();
        QCOMPARE(countNodes(), before);
        QVERIFY(findNode("flags") >= 0);
    }

    // ── Multiple duplicates each add exactly one ──