Method testInsertAtRootLevel

tests/test_context_menu.cpp:191–200

    // ── Insert at root level (parentId=0) ──

    void testInsertAtRootLevel() {
        int before = countNodes();
        m_ctrl->insertNode(0, -1, NodeKind::Hex64, "rootField");
        QApplication::processEvents();

        QCOMPARE(countNodes(), before + 1);
        int idx = findNode("rootField");
        QVERIFY(idx >= 0);
        QCOMPARE(m_doc->tree.nodes[idx].parentId, (uint64_t)0);
    }

    // ── Append 128 bytes adds exactly 16 Hex64 nodes ──