- Queue cards expand to a detail panel with the waveform, elapsed/total/remaining times, draggable in/out handles, scrub-to-seek and a 'pausa dopo' gap. - /api/peaks now also returns exact duration (samples/8000) so non-playing tracks have correct times/trim without relying on the output media probe. - Service worker switched to network-first (+v2) so UI updates aren't masked by a stale cache; output.js probeDurations hardened (load()+timeout fallback). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>