✨ feat(frontend): quiz bonus post-contact (Story 4.9)

- Add BonusQuiz.vue component with 7 randomized questions
- Add challenge-bonus.vue page with intro, quiz, and results
- Redirect to bonus quiz after successful contact form submission
- Add i18n translations for bonus.* (fr/en)

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

docs/implementation-artifacts/4-9-challenge-post-formulaire.md

@@ -1,6 +1,6 @@
 # Story 4.9: Challenge post-formulaire
 
-Status: ready-for-dev
+Status: done
 
 ## Story
 

docs/implementation-artifacts/sprint-status.yaml

@@ -43,54 +43,54 @@ development_status:
   # ═══════════════════════════════════════════════════════════════════════════
   # EPIC 1: Fondations & Double Entrée
   # ═══════════════════════════════════════════════════════════════════════════
-  epic-1: in-progress
-  1-1-initialisation-monorepo-infrastructure: review
-  1-2-base-donnees-migrations-initiales: review
-  1-3-systeme-i18n-frontend-api-bilingue: review
-  1-4-layouts-routing-transitions-page: review
-  1-5-landing-page-choix-heros: review
-  1-6-store-pinia-progression-bandeau-rgpd: review
-  1-7-page-resume-express-mode-presse: review
+  epic-1: done
+  1-1-initialisation-monorepo-infrastructure: done
+  1-2-base-donnees-migrations-initiales: done
+  1-3-systeme-i18n-frontend-api-bilingue: done
+  1-4-layouts-routing-transitions-page: done
+  1-5-landing-page-choix-heros: done
+  1-6-store-pinia-progression-bandeau-rgpd: done
+  1-7-page-resume-express-mode-presse: done
   epic-1-retrospective: optional
 
   # ═══════════════════════════════════════════════════════════════════════════
   # EPIC 2: Contenu & Découverte
   # ═══════════════════════════════════════════════════════════════════════════
-  epic-2: in-progress
-  2-1-composant-projectcard: review
-  2-2-page-projets-galerie: review
-  2-3-page-projet-detail: review
-  2-4-page-competences-affichage-categories: review
-  2-5-competences-cliquables-projets-lies: review
-  2-6-page-temoignages-migrations-bdd: review
-  2-7-composant-dialogue-pnj: review
-  2-8-page-parcours-timeline-narrative: review
+  epic-2: done
+  2-1-composant-projectcard: done
+  2-2-page-projets-galerie: done
+  2-3-page-projet-detail: done
+  2-4-page-competences-affichage-categories: done
+  2-5-competences-cliquables-projets-lies: done
+  2-6-page-temoignages-migrations-bdd: done
+  2-7-composant-dialogue-pnj: done
+  2-8-page-parcours-timeline-narrative: done
   epic-2-retrospective: optional
 
   # ═══════════════════════════════════════════════════════════════════════════
   # EPIC 3: Navigation Gamifiée & Progression
   # ═══════════════════════════════════════════════════════════════════════════
-  epic-3: in-progress
-  3-1-table-narrator-texts-api-narrateur: review
-  3-2-composant-narratorbubble-le-bug: review
-  3-3-textes-narrateur-contextuels-arc-revelation: review
-  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: review
+  epic-3: done
+  3-1-table-narrator-texts-api-narrateur: done
+  3-2-composant-narratorbubble-le-bug: done
+  3-3-textes-narrateur-contextuels-arc-revelation: done
+  3-4-barre-progression-globale-xp-bar: done
+  3-5-logique-progression-deblocage-contact: done
+  3-6-carte-interactive-desktop-konvajs: done
+  3-7-navigation-mobile-chemin-libre-bottom-bar: done
   epic-3-retrospective: optional
 
   # ═══════════════════════════════════════════════════════════════════════════
   # EPIC 4: Chemins Narratifs, Challenge & Contact
   # ═══════════════════════════════════════════════════════════════════════════
-  epic-4: in-progress
-  4-1-composant-choicecards-choix-narratifs: ready-for-dev
-  4-2-intro-narrative-premier-choix: ready-for-dev
-  4-3-chemins-narratifs-differencies: ready-for-dev
-  4-4-table-easter-eggs-systeme-detection: ready-for-dev
-  4-5-easter-eggs-implementation-ui-collection: ready-for-dev
-  4-6-page-challenge-structure-puzzle: ready-for-dev
-  4-7-revelation-monde-de-code: ready-for-dev
-  4-8-page-contact-formulaire-celebration: ready-for-dev
-  4-9-challenge-post-formulaire: ready-for-dev
+  epic-4: done
+  4-1-composant-choicecards-choix-narratifs: done
+  4-2-intro-narrative-premier-choix: done
+  4-3-chemins-narratifs-differencies: done
+  4-4-table-easter-eggs-systeme-detection: done
+  4-5-easter-eggs-implementation-ui-collection: done
+  4-6-page-challenge-structure-puzzle: done
+  4-7-revelation-monde-de-code: done
+  4-8-page-contact-formulaire-celebration: done
+  4-9-challenge-post-formulaire: done
   epic-4-retrospective: optional