✨ feat(mobile): add BottomBar navigation and CheminLibre drawer (Story 3.7)

- Add ZoneCard component for zone display with status indicators
- Add CheminLibre drawer with vertical zone cards and path decoration
- Add BottomBar with Map, Progress, and Settings buttons
- Add ProgressDetail modal showing visited sections
- Add SettingsDrawer with language, consent, and reset options
- Add i18n translations for zone, cheminLibre, bottomBar, settings
- Add --bottom-bar-height CSS variable for spacing
- Modify layouts to include BottomBar on mobile (< 768px)
- Support safe-area-inset for iOS devices
- Touch targets minimum 48x48px for WCAG compliance

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/implementation-artifacts/sprint-status.yaml

@@ -77,7 +77,7 @@ development_status:
   3-4-barre-progression-globale-xp-bar: review
   3-5-logique-progression-deblocage-contact: review
   3-6-carte-interactive-desktop-konvajs: review
-  3-7-navigation-mobile-chemin-libre-bottom-bar: ready-for-dev
+  3-7-navigation-mobile-chemin-libre-bottom-bar: review
   epic-3-retrospective: optional
 
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