S4 spike: iOS import → OPFS

Do this on your iPhone (Safari):
  1. Tap Pick photos and select ~100 photos from your library.
  2. Wait for the import to finish; note the time and any errors.
  3. Tap Pick photos again and select the same 100 photos — all should skip as duplicates.
  4. Reload this page — your library grid must still be there (OPFS persistence).
Progress: idle
Library (0):

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