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buzz/mobile/lib/features/channels
klopez4212 e2dc54e22f Support PNG and HEIC photos in the native iOS zoom gallery (#9314)
## Summary

The opt-in iOS zoom gallery rejected PNG and HEIC/HEIF photos, so photo
stacks containing those files opened the Flutter fallback. Accept these
formats by MIME type or file extension, including uppercase extensions
and URLs with query strings.

Preserve animated PNG playback by forwarding continuing decoded frames
to the selected native page. Keep the existing five-photo load window,
coalesce frames while the bridge is busy, skip offscreen frame encoding,
and release listeners on eviction or dismissal. Native updates reject
stale sessions, offscreen pages, malformed frames, and closed viewers.

`BUZZ_NATIVE_PHOTO_ZOOM` remains opt-in. iOS below 18 and unsupported
formats retain the existing gallery.

### Related issue

Follow-up to #9259. No matching open issue or PR found; #7666 concerns
desktop HEIC upload tiling, a separate path.

### Testing

- `just mobile-install mobile-check mobile-test` passed.
- Full mobile suite with `BUZZ_NATIVE_PHOTO_ZOOM=true`: 4,623 passed, 68
skipped. Standard configuration: 4,599 passed, 92 skipped; push
configuration and secp256k1 package tests also passed.
- Real PNG and HEIC decoding through the production presentation bridge;
real two-frame APNG decoding with continuing-frame and listener-cleanup
assertions.
- `scripts/test-mobile-photo-zoom.sh` on an iOS 27 simulator exercises
the production native controller, including frame updates, stale-page
rejection, malformed input and teardown.

No physical-device or end-to-end zoom recording captured. This extends
accepted image formats and playback without changing the gallery layout.

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Signed-off-by: kenny lopez <klopez4212@gmail.com>
Co-authored-by: Terp <5856f6900e8e0a4e0ea1f4f8d2ee33e4753d2119bc122f94ecafc660b46c0511@buzz.block.builderlab.xyz>
2026-11-10 07:34:40 -08:00
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