The application-landscape identity as a first-class theme: warm paper bg,
near-black ink text, parchment hairlines, ink-filled primary actions, and the
EA lifecycle palette mapped onto the status tokens (success=actuel green,
warning=transition orange, info=cible blue, error=obsolescence red). Carries
its own typography override (Hanken Grotesk + JetBrains Mono) — themeMap
entries are now a loose readonly list of per-VarGroup createTheme overrides,
cast at the use site like before.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>