Function updateNucleiCardStatus

web/scripts/ragnar_modern.js:19469–19496

(statusEl, available, templates)

    // Reconcile the confusing case this panel can otherwise show: the SoC
    // reports under-voltage while the estimated budget still has plenty of
    // headroom. That is not a contradiction — the loss is between the PSU and
    // the board (cable/connector), not too much current — and saying so stops
    // the numbers reading like a bug.
    const uv = d.summary && d.summary.undervoltage;
    if (uv && est.headroom_ma > 0 && !est.tight) {
        html += `<p class="text-[12px] text-amber-300 mt-2 border-l-2 border-amber-700 pl-2">
            Under-voltage <em>despite</em> headroom on paper? That points at a <strong>cable/connector voltage drop</strong>, not too much current: the draw is well under the supply's rating, but the 5&nbsp;V rail still sags below spec between the PSU and the board — a thin/long micro-USB cable, a tired connector, or a flat 5.0&nbsp;V supply with no margin. Try a short thick cable and a 5.1&nbsp;V supply before reaching for a bigger PSU.</p>`;
    }
    html += `</div>`;

    // 4) Reference maxima for the two named field configs.
    const prof = d.profiles || {};
    if (prof.stationary || prof.roaming) {
        html += `<div>
            <div class="text-xs uppercase tracking-wide text-gray-500 mb-2">Reference: your two field configs (peak, on this board)</div>
            <div class="space-y-1">`;
        [['stationary', prof.stationary], ['roaming', prof.roaming]].forEach(([, p]) => {
            if (!p) return;
            html += `<div class="flex items-center justify-between gap-2 text-xs bg-slate-800/40 rounded px-2 py-1">
                <div><span class="text-gray-200">${escapeHtml(p.label)}</span>
                    <span class="text-gray-500">· ${(p.devices || []).map(escapeHtml).join(' + ')}</span></div>
                <div class="font-mono whitespace-nowrap ${p.fits ? 'text-green-300' : 'text-red-300'}">${_pwMa(p.peak_ma)}${p.fits ? '' : ' ⚠'}</div>
            </div>`;
        });
        html += `</div>
            <p class="text-[11px] text-gray-500 mt-2">On a Pi Zero / Pi 3 the Alfa is not hot-pluggable — it only enumerates if it is connected when power is applied. If a config under-volts, a powered USB hub for the dongles fixes it without a bigger PSU.</p>
        </div>`;
    }

    return html;
}