Method buildPeripheralsTab

src/gui/RadioSetupDialog.cpp:5186–5486

// ─── Peripherals tab — manual IP connect for TGXL, PGXL, AG (#914) ───────────

QWidget* RadioSetupDialog::buildPeripheralsTab()
{
    auto* page = new QWidget;
    auto* vbox = new QVBoxLayout(page);
    vbox->setSpacing(8);

    auto* group = new QGroupBox("External Devices — Manual IP Connection");
    group->setStyleSheet(kGroupStyle);
    auto* grid = new QGridLayout(group);
    grid->setSpacing(6);

    // Column headers
    auto addHeader = [&](int col, const QString& text) {
        auto* lbl = new QLabel(text);
        AetherSDR::ThemeManager::instance().applyStyleSheet(lbl, "QLabel { color: {{color.text.secondary}}; font-size: 11px; font-weight: bold; }");
        grid->addWidget(lbl, 0, col);
    };
    addHeader(0, "Device");
    addHeader(1, "IP Address");
    addHeader(2, "Port");
    addHeader(3, "");
    addHeader(4, "Status");

    auto& settings = AppSettings::instance();

    static const QString kBtnStyle =
        "QPushButton { background: #1a2a3a; border: 1px solid #304050; "
        "border-radius: 3px; color: #c8d8e8; font-size: 11px; font-weight: bold; "
        "padding: 3px 10px; }"
        "QPushButton:hover { background: #203040; }";

    // Helper to build one peripheral row
    auto buildRow = [&](int row, const QString& label, const QString& ipKey,
                        const QString& portKey, int defaultPort,
                        auto connectFn, auto disconnectFn, auto isConnectedFn,
                        auto peerAddressFn, auto peerPortFn) {
        // Device label
        auto* devLbl = new QLabel(label);
        devLbl->setStyleSheet(kLabelStyle);
        grid->addWidget(devLbl, row, 0);

        // IP field — pre-fill from settings, or from live connection if discovered
        auto* ipEdit = new QLineEdit;
        ipEdit->setPlaceholderText("e.g. 192.168.1.100");
        ipEdit->setStyleSheet(kEditStyle);
        ipEdit->setMinimumWidth(140);
        QString savedIp = settings.value(ipKey, "").toString();
        if (!savedIp.isEmpty()) {
            ipEdit->setText(savedIp);
        } else if (isConnectedFn()) {
            ipEdit->setText(peerAddressFn());
        }
        grid->addWidget(ipEdit, row, 1);

        // Port field — pre-fill from settings, or from live connection
        auto* portSpin = new QSpinBox;
        portSpin->setRange(1, 65535);
        int savedPort = settings.value(portKey, "0").toInt();