feat(j0.3): socle transverse (Result/Failure, theme, router, DI)
- core/error : Result<S> maison (Ok/Err) + Failure scellee avec egalite de valeur
- core/theme : AppTheme Material 3 (palette coucher, cibles tactiles enfant)
- core/router : routes nommees child/parentGate/parent (Navigator 1, placeholders)
- core/di : conventions providers
- CLAUDE.md §7 : Result maison & Navigator 1 actes (YAGNI)
- ROADMAP : 0.3 cochee, Jalon 0 termine
- corrections code review : egalite Failure, assertions tests, Map.unmodifiable
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Vincent Bourdon
02a121703f