Daniel d20027f24f feat(pe-guide): 7 cardiac sounds, APTM image full-width + tap-to-zoom, synth stop/progress ...

Three user-flagged fixes:

1. Cardiac sounds library expanded from 3 to 7 (from Wikimedia Commons
   heart-sounds + heart-murmurs subcategories). All real recordings:
   - Normal (61 bpm)                 [existing]
   - Infant heartbeat                [new — pediatric reference]
   - VSD                              [existing]
   - Mitral valve prolapse            [existing]
   - Still's murmur in a toddler      [new — classic innocent murmur]
   - Functional murmur (adult female) [new — benign flow murmur]
   - PVCs                             [new — arrhythmia]
   All with native <audio controls> (play/pause/seek/elapsed/total
   work on desktop AND mobile for free).

2. APTM diagram is now full-width on every device, no longer sharing
   row space with the legend on mobile:
   - Image always on its own row, max-width:420px, centered
   - Wrapped in an <a href target="_blank"> — tap/click opens the PNG
     full-size in a new tab where browser pinch-zoom works natively
   - "Tap to open full-size" hint line under the image
   - Legend below uses auto-fit minmax(min(100%,260px),1fr) so it stacks
     on narrow viewports without cramping

3. Synth sounds (rhonchi, pleural rub, grunting, normal vesicular — all
   Web-Audio-API generated, no native controls) now have:
   - Play button → kicks off playback and hides itself
   - Stop button appears, lets user terminate early
   - Progress bar animates over 3.2 s, resets at end
   - Only one synth sound plays at a time (clicking another stops the
     previous)

2026-04-22 21:50:54 +02:00

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