Two-pronged fix so the Translate + Scan FABs stay reachable when
the mobile soft keyboard is open:
- Add `interactive-widget=resizes-content` to the viewport meta —
Chrome on Android then shrinks the layout viewport when the
keyboard opens, so `position: fixed; bottom: ...` is naturally
above it. iOS Safari ignores this directive, hence:
- VisualViewport listener computes
inset = innerHeight - vv.height - vv.offsetTop
and writes it to a `--kb-inset` CSS custom property. The FAB
bottom calc uses `max(var(--kb-inset), safe-area-inset-bottom)`
so the keyboard inset wins when it's open and the home-indicator
inset wins when it isn't.
Net: tap the editor on iOS → keyboard slides up → Translate /
Scan FABs rise with it, no manual minimise required.
86620f9f5c