feat: configurator overhaul — full i18n, AI brief generation, redesigned UI

Configurator:
- Full i18n: industries, timelines, AI types, field labels, error messages,
  complete screen — all translated to French
- Real AI brief generation via OpenRouter (DeepSeek V3.2) with fallback template
- Fixed email notification bug (was sending to client instead of admin)
- Added wizard reset capability ("Start Over" button on success screen)
- Redesigned section shell with refined card, accent line, step indicators
- All step components use translation keys instead of hardcoded strings

Hero:
- Tighter spacing to keep CTAs above the fold
- Reduced bottom gradient height

Footer:
- Removed GitHub link
- Legal name in copyright
- "American-founded" location text

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/i18n/messages/en.json

@@ -64,14 +64,17 @@
       "subtitle": "A few details help us prepare the right approach."
     },
     "step3": {
-      "title": "Your details",
-      "subtitle": "We'll send you a personalized project brief."
+      "title": "Almost there",
+      "subtitle": "Review your selections and tell us how to reach you."
     },
     "complete": {
       "title": "Your project brief is ready",
       "subtitle": "Check your inbox — we've sent a detailed brief to {email}",
       "bookTitle": "Book a Consultation",
-      "bookSubtitle": "30 minutes to discuss your brief with our team"
+      "bookSubtitle": "30 minutes to discuss your brief with our team",
+      "bookCall": "Book a Call",
+      "briefPreview": "Your project brief",
+      "reachDirectly": "Or reach us directly at"
     },
     "howItWorks": "How it works",
     "noCommitment": "No commitment required",
@@ -92,9 +95,63 @@
     },
     "aiToggle": "Add AI Integration",
     "aiDescription": "Intelligent features and automation built directly into your systems.",
+    "aiTypes": {
+      "teammate": {
+        "title": "AI Teammate",
+        "description": "An internal AI assistant that helps your team work faster — automates tasks, answers questions, connects your tools."
+      },
+      "customer-facing": {
+        "title": "Customer-Facing AI",
+        "description": "AI features your clients interact with — smart search, personalized recommendations, conversational interfaces."
+      },
+      "data-intelligence": {
+        "title": "Data Intelligence",
+        "description": "AI that analyzes your business data to surface insights, trends, and actionable recommendations."
+      },
+      "notsure": {
+        "title": "Not Sure Yet",
+        "description": "No problem — we'll explore the best AI approach together during discovery."
+      }
+    },
+    "industries": {
+      "maritime": "Maritime / Yachting",
+      "hospitality": "Hospitality",
+      "technology": "Technology",
+      "realestate": "Real Estate",
+      "finance": "Finance",
+      "ngo": "NGO / Nonprofit",
+      "other": "Other"
+    },
+    "timelines": {
+      "asap": "ASAP",
+      "1-3months": "1–3 months",
+      "3-6months": "3–6 months",
+      "exploring": "Just exploring"
+    },
+    "fields": {
+      "industry": "Your industry",
+      "scope": "What are you looking to achieve?",
+      "scopeOptional": "(optional)",
+      "scopePlaceholder": "e.g. We need to replace our current booking system and improve the client-facing experience…",
+      "timeline": "Timeline",
+      "name": "Your name",
+      "company": "Company",
+      "email": "Email address"
+    },
+    "summary": {
+      "heading": "Your selections",
+      "aiEnhancement": "AI Enhancement"
+    },
+    "generating": "Generating",
+    "privacy": "Your information is private and will never be shared.",
     "generateBrief": "Generate My Brief",
     "nextStep": "Next Step",
-    "back": "Back"
+    "back": "Back",
+    "startOver": "Start Over",
+    "errors": {
+      "general": "Something went wrong. Please try again.",
+      "network": "Network error. Please check your connection and try again."
+    }
   },
   "process": {
     "eyebrow": "How We Work",

src/i18n/messages/fr.json

@@ -64,14 +64,17 @@
       "subtitle": "Quelques détails nous aident à préparer la bonne approche."
     },
     "step3": {
-      "title": "Vos coordonnées",
-      "subtitle": "Nous vous enverrons un brief projet personnalisé."
+      "title": "Presque terminé",
+      "subtitle": "Vérifiez vos sélections et indiquez-nous comment vous joindre."
     },
     "complete": {
       "title": "Votre brief projet est prêt",
       "subtitle": "Vérifiez votre boîte mail — nous avons envoyé un brief détaillé à {email}",
       "bookTitle": "Réservez une Consultation",
-      "bookSubtitle": "30 minutes pour discuter de votre brief avec notre équipe"
+      "bookSubtitle": "30 minutes pour discuter de votre brief avec notre équipe",
+      "bookCall": "Réserver un Appel",
+      "briefPreview": "Votre brief projet",
+      "reachDirectly": "Ou contactez-nous directement à"
     },
     "howItWorks": "Comment ça marche",
     "noCommitment": "Sans engagement",
@@ -92,9 +95,63 @@
     },
     "aiToggle": "Ajouter l'Intégration IA",
     "aiDescription": "Fonctionnalités intelligentes et automatisation intégrées directement dans vos systèmes.",
+    "aiTypes": {
+      "teammate": {
+        "title": "IA Coéquipier",
+        "description": "Un assistant IA interne qui aide votre équipe à travailler plus vite — automatise les tâches, répond aux questions, connecte vos outils."
+      },
+      "customer-facing": {
+        "title": "IA Client",
+        "description": "Des fonctionnalités IA avec lesquelles vos clients interagissent — recherche intelligente, recommandations personnalisées, interfaces conversationnelles."
+      },
+      "data-intelligence": {
+        "title": "Intelligence Données",
+        "description": "L'IA analyse vos données métier pour faire émerger des insights, tendances et recommandations actionnables."
+      },
+      "notsure": {
+        "title": "Pas Encore Sûr",
+        "description": "Pas de problème — nous explorerons ensemble la meilleure approche IA lors de la phase de découverte."
+      }
+    },
+    "industries": {
+      "maritime": "Maritime / Yachting",
+      "hospitality": "Hôtellerie",
+      "technology": "Technologie",
+      "realestate": "Immobilier",
+      "finance": "Finance",
+      "ngo": "ONG / Associatif",
+      "other": "Autre"
+    },
+    "timelines": {
+      "asap": "Dès que possible",
+      "1-3months": "1–3 mois",
+      "3-6months": "3–6 mois",
+      "exploring": "Je me renseigne"
+    },
+    "fields": {
+      "industry": "Votre secteur",
+      "scope": "Que cherchez-vous à accomplir ?",
+      "scopeOptional": "(facultatif)",
+      "scopePlaceholder": "ex. Nous devons remplacer notre système de réservation actuel et améliorer l'expérience client…",
+      "timeline": "Calendrier",
+      "name": "Votre nom",
+      "company": "Entreprise",
+      "email": "Adresse email"
+    },
+    "summary": {
+      "heading": "Vos sélections",
+      "aiEnhancement": "Enrichissement IA"
+    },
+    "generating": "Génération",
+    "privacy": "Vos informations sont privées et ne seront jamais partagées.",
     "generateBrief": "Générer Mon Brief",
     "nextStep": "Étape Suivante",
-    "back": "Retour"
+    "back": "Retour",
+    "startOver": "Recommencer",
+    "errors": {
+      "general": "Une erreur est survenue. Veuillez réessayer.",
+      "network": "Erreur réseau. Veuillez vérifier votre connexion et réessayer."
+    }
   },
   "process": {
     "eyebrow": "Notre Méthode",