Method testPaddingLineRejectsValueSpan

tests/test_editor.cpp:792–816

── Test: resolvedSpanFor rejects Value on Padding (defense-in-depth) ──

    // ── Test: resolvedSpanFor rejects Value on Padding (defense-in-depth) ──
    void testPaddingLineRejectsValueSpan() {
        m_editor->applyDocument(m_result);

        // Find a Padding line
        int paddingLine = -1;
        for (int i = 0; i < m_result.meta.size(); i++) {
            if (m_result.meta[i].nodeKind == NodeKind::Padding &&
                m_result.meta[i].lineKind == LineKind::Field) {
                paddingLine = i;
                break;
            }
        }
        QVERIFY(paddingLine >= 0);

        const LineMeta* lm = m_editor->metaForLine(paddingLine);
        QVERIFY(lm);

        // valueSpanFor returns valid (shared with Hex via KF_HexPreview)
        ColumnSpan vs = RcxEditor::valueSpan(*lm, 200);
        QVERIFY2(vs.valid, "valueSpanFor should return valid for Padding (shared HexPreview flag)");

        // But beginInlineEdit should still reject it
        QVERIFY(!m_editor->beginInlineEdit(EditTarget::Value, paddingLine));
        QVERIFY(!m_editor->isEditing());
    }

    // ── Test: value edit commit fires signal with typed text ──
    void testValueEditCommitUpdatesSignal() {