TEMPORARY diagnostic to find why GCG export silently does nothing on
Android Telegram/VK in-app WebViews, where there is no developer console
to read. Tapping Export now probes the delivery path — navigator.share /
canShare presence, canShare({files}), the share-vs-download decision —
performs the real attempt and captures its outcome, then renders it all in
an on-screen overlay (with a Share control to send the report back).
No fix yet by design (owner chose diagnostic-first): once the on-device
readings come back, this is replaced by the targeted Android delivery fix.
Ilia Denisov