feat: Phase 1 — socle backend FastAPI + frontend Next.js

Backend (FastAPI + SQLAlchemy):
- Modèles : User, Client, Audit, Cible, Vulnérabilité, Action
- Auth JWT (register/login/me) avec bcrypt
- Routes CRUD complets : clients, audits, cibles, vulnérabilités, actions
- Schémas Pydantic v2, migrations Alembic configurées
- Rate limiting (slowapi), CORS, structure scanners/reports pour phase 2

Frontend (Next.js 14 App Router):
- shadcn/ui : Button, Input, Card, Badge, Label
- Page login avec gestion token JWT
- Dashboard avec stats temps réel
- Pages Clients (grille) et Audits (liste) avec recherche
- Layout avec sidebar navigation + protection auth
- Dockerfiles multi-stage (backend + frontend standalone)

Infrastructure:
- docker-compose.yml : postgres, redis, backend, frontend
- docker-compose.prod.yml avec labels Traefik
- .env.example complet
- .gitignore mis à jour

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "auditshield-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "next": "14.2.3",
+    "react": "^18",
+    "react-dom": "^18",
+    "@radix-ui/react-avatar": "^1.0.4",
+    "@radix-ui/react-badge": "^1.0.0",
+    "@radix-ui/react-dialog": "^1.0.5",
+    "@radix-ui/react-dropdown-menu": "^2.0.6",
+    "@radix-ui/react-label": "^2.0.2",
+    "@radix-ui/react-select": "^2.0.0",
+    "@radix-ui/react-separator": "^1.0.3",
+    "@radix-ui/react-slot": "^1.0.2",
+    "@radix-ui/react-toast": "^1.1.5",
+    "class-variance-authority": "^0.7.0",
+    "clsx": "^2.1.1",
+    "lucide-react": "^0.378.0",
+    "tailwind-merge": "^2.3.0",
+    "tailwindcss-animate": "^1.0.7",
+    "jose": "^5.2.4",
+    "js-cookie": "^3.0.5"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "@types/js-cookie": "^3.0.6",
+    "typescript": "^5",
+    "tailwindcss": "^3.4.1",
+    "postcss": "^8",
+    "autoprefixer": "^10.0.1",
+    "eslint": "^8",
+    "eslint-config-next": "14.2.3"
+  }
+}