Index photos and videos from the device library into a client-pushed ios_library source, upload originals in resumable chunks, and review, approve, and share project variants with expo-video and the native share sheet. Pure logic for chunking, resume, indexing, and variants is unit tested. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NLSCTnhge4umMnemGXWr1w