✨ feat(epic-4): chemins narratifs, easter eggs, challenge et contact

Epic 4: Chemins Narratifs, Challenge & Contact

Stories implementees:
- 4.1: Composant ChoiceCards pour choix narratifs binaires
- 4.2: Sequence d'intro narrative avec Le Bug
- 4.3: Chemins narratifs differencies avec useNarrativePath
- 4.4: Table easter_eggs et systeme de detection (API + composable)
- 4.5: Easter eggs UI (popup, notification, collection)
- 4.6: Page challenge avec puzzle de code
- 4.7: Page revelation "Monde de Code"
- 4.8: Page contact avec formulaire et stats

Fichiers crees:
- Frontend: ChoiceCards, IntroSequence, ZoneEndChoice, EasterEggPopup,
  CodePuzzle, ChallengeSuccess, CodeWorld, et pages intro/challenge/revelation
- API: EasterEggController, Model, Migration, Seeder

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

frontend/app/pages/temoignages.vue

@@ -97,22 +97,8 @@
     </section>
 
     <!-- CTA section -->
-    <section class="container mx-auto px-4 pb-16">
-      <div class="rounded-xl bg-gradient-to-r from-sky-500/10 to-purple-500/10 p-8 text-center">
-        <h2 class="text-2xl font-semibold text-white">
-          {{ $t('testimonials.cta_title') }}
-        </h2>
-        <p class="mt-2 text-gray-400">
-          {{ $t('testimonials.cta_description') }}
-        </p>
-        <NuxtLink
-          to="/contact"
-          class="mt-4 inline-block rounded-lg bg-sky-500 px-6 py-3 font-medium text-white transition-colors hover:bg-sky-400"
-        >
-          {{ $t('testimonials.cta_button') }}
-        </NuxtLink>
-      </div>
-    </section>
+    <!-- Choice for next zone -->
+    <FeatureZoneEndChoice />
   </div>
 </template>
 
@@ -125,7 +111,7 @@ definePageMeta({
 
 const { setPageMeta } = useSeo()
 const { t } = useI18n()
-const progressStore = useProgressStore()
+const progressStore = useProgressionStore()
 
 setPageMeta({
   title: t('testimonials.page_title'),