Preferred sources in AI answers

<div class="d2 preferred"><div class="eyebrow">READER CHOICE</div><div class="choice"><span>SELECT SOURCE</span><button id="prefSwitch" aria-pressed="false">FIELD NOTES <b id="switchState">OFF</b></button></div><div class="box answer"><b>How much room does a desk lamp need?</b><p>Check base width and arm reach before comparing options.</p><div class="link"><span>FIELD NOTES · Setup guide</span><strong id="preferredBadge"></strong></div><div class="link muted"><span>OPEN GUIDE · Measurements</span></div></div></div>

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