docs: document iOS PWA audio hanging known issue (#475)

added note about intermittent audio playback hangs in iOS standalone
(PWA) mode. PR #466 added NetworkOnly caching for audio routes, but
iOS Safari is slow to update service workers. workaround is to delete
and re-add home screen bookmark. flagged for further investigation if
issue persists.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

authored by zzstoatzz.io Claude and committed by GitHub 46345ca1 d67ffa76

Changed files
+2 -1
+2 -1
STATUS.md
··· 311 - playback auto-start on refresh (#225) - investigating localStorage/queue state persistence 312 - no ATProto records for albums yet (#221 - consciously deferred) 313 - no AIFF/AIF transcoding support (#153) 314 315 ### new features 316 - issue #146: content-addressable storage (hash-based deduplication) ··· 512 513 --- 514 515 - this is a living document. last updated 2025-12-04.
··· 311 - playback auto-start on refresh (#225) - investigating localStorage/queue state persistence 312 - no ATProto records for albums yet (#221 - consciously deferred) 313 - no AIFF/AIF transcoding support (#153) 314 + - iOS PWA audio may hang on first play after backgrounding - service worker caching interacts poorly with 307 redirects to R2 CDN. PR #466 added `NetworkOnly` for audio routes which should fix this, but iOS PWAs are slow to update service workers. workaround: delete home screen bookmark and re-add. may need further investigation if issue persists after SW propagates. 315 316 ### new features 317 - issue #146: content-addressable storage (hash-based deduplication) ··· 513 514 --- 515 516 + this is a living document. last updated 2025-12-05.