✨ 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>

api/routes/api.php

@@ -1,5 +1,6 @@
 <?php
 
+use App\Http\Controllers\Api\EasterEggController;
 use App\Http\Controllers\Api\NarratorController;
 use App\Http\Controllers\Api\ProjectController;
 use App\Http\Controllers\Api\SkillController;
@@ -16,3 +17,5 @@ Route::get('/skills', [SkillController::class, 'index']);
 Route::get('/skills/{slug}/projects', [SkillController::class, 'projects']);
 Route::get('/testimonials', [TestimonialController::class, 'index']);
 Route::get('/narrator/{context}', [NarratorController::class, 'getText']);
+Route::get('/easter-eggs', [EasterEggController::class, 'index']);
+Route::post('/easter-eggs/{slug}/validate', [EasterEggController::class, 'validate']);