- Updated comments in various components, schemas, and repositories to remove references to original Dart files.
- Ensured consistency in documentation while maintaining the context of the code.
FB IAB on Xiaomi (and similar WebViews that don't shrink 100dvh) keeps
the chat input covered by the soft keyboard. Fix by writing the
visualViewport-derived keyboard height to a CSS variable on <html> and
consuming it as padding-bottom on the chat input bar.
- Add useKeyboardHeight hook (visualViewport + rAF batching, no re-renders)
- Apply --keyboard-height + env(safe-area-inset-bottom) to .bar padding
- Add scrollIntoView on textarea focus so the input stays visible
- Add viewportFit: cover so safe-area-inset-bottom is reported
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