Components:
- Replace components/ui primitives with COSS equivalents from the @coss/* shadcn
registry. Add menu/preview-card/group; remove the superseded dropdown-menu,
hover-card, button-group; keep carousel (no COSS equivalent).
- Migrate live call sites to canonical COSS APIs preserving layout/behavior:
sidebar menus (nav-user, team-switcher, nav-notifications), chat-input radio
menu, patient dialogs/cards, auth forms (FieldGroup -> flex column), settings.
- ai-elements: migrate the live conversation/message with behavior parity
(Tooltip via render, Group/GroupText); repoint dormant files (hover-card ->
preview-card, dropdown-menu -> menu, button-group -> group, InputGroupButton
-> Button). Residual pre-existing Base UI type drift stays behind
ignoreBuildErrors.
Theme:
- Adopt COSS default neutral tokens in globals.css with light + dark palettes.
- Add next-themes (defaultTheme=dark, enableSystem) and drop the forced dark
class. Align font variables to the COSS contract (--font-sans/-heading/-mono).
Make scrollbars theme-aware.
i18n:
- Add i18next + react-i18next (lib/i18n/config.ts, locales/en/translation.json,
components/i18n-provider.tsx mounted in layout). Convert auth forms, sidebar
nav, and settings tabs to useTranslation() as the reference pattern.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>