metube

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Helmut 6ff364aacf feat(ui): warn before share + surface failures for large files

Web Share fails silently when iOS' share sheet refuses the payload,
typically because the file exceeds the platform's soft size limit
(~50–100 MB depending on iOS version). The previous patch logged to
the console but the user saw nothing — staring at a button that
'does nothing' is poor UX.

Adds two layers of feedback:

1. Pre-flight size check (SHARE_SIZE_WARN_BYTES = 80 MB, conservative
   relative to iOS' actual limit) with a confirm() dialog before the
   fetch. Avoids spending bandwidth pulling a 150 MB blob into the
   browser only for navigator.canShare to reject it.

2. Surfaces canShare-rejection AND share()-failure as a visible
   alert() suggesting the user fall back to the download link next
   to the share button.

Tested locally with files from 0.7 MB up to 150.7 MB: small files
share unchanged, the 150 MB file now produces a pre-flight warning
the user can dismiss, and any subsequent rejection produces a clear
alert instead of silently no-op'ing.

2026-05-29 04:56:52 +02:00