- bubbles spring in anchored at their avatar corner; thinking state is a
typing bubble (three bouncing dots) that springs in/out where the reply
lands; reduced-motion falls back to opacity fades
- mobile /odin is immersive: AppShell hides its header and main padding
below md, the chat owns 100svh full-bleed with safe-area insets and a
back arrow (history back, home on deep links)
- desktop card border kept divider-colored via longhand border props (a
responsive border shorthand reset the color to black)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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