feat: NextAuth credentials + JWT 8h + rate limiting

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

src/lib/auth.ts

@@ -0,0 +1,63 @@
+import type { NextAuthOptions } from 'next-auth'
+import CredentialsProvider from 'next-auth/providers/credentials'
+import { compare } from 'bcryptjs'
+import { prisma } from './prisma'
+import { checkRateLimit, recordFailedAttempt, clearAttempts } from './rate-limit'
+
+export const authOptions: NextAuthOptions = {
+  session: {
+    strategy: 'jwt',
+    maxAge: 8 * 60 * 60, // 8 heures
+  },
+  pages: {
+    signIn: '/login',
+  },
+  callbacks: {
+    async jwt({ token, user }) {
+      if (user) {
+        token.role = (user as any).role
+        token.id = user.id
+      }
+      return token
+    },
+    async session({ session, token }) {
+      if (session.user) {
+        (session.user as any).role = token.role
+        ;(session.user as any).id = token.id
+      }
+      return session
+    },
+  },
+  providers: [
+    CredentialsProvider({
+      name: 'Credentials',
+      credentials: {
+        email: { label: 'Email', type: 'email' },
+        password: { label: 'Mot de passe', type: 'password' },
+      },
+      async authorize(credentials, req) {
+        if (!credentials?.email || !credentials?.password) return null
+
+        const ip =
+          (req as any)?.headers?.['x-forwarded-for']?.split(',')[0]?.trim() ?? 'unknown'
+        const key = `${ip}:${credentials.email}`
+
+        if (!checkRateLimit(key)) {
+          throw new Error('RATE_LIMITED')
+        }
+
+        const user = await prisma.user.findUnique({
+          where: { email: credentials.email },
+        })
+
+        if (!user || !(await compare(credentials.password, user.password))) {
+          recordFailedAttempt(key)
+          return null
+        }
+
+        clearAttempts(key)
+        return { id: user.id, email: user.email, name: user.name, role: user.role }
+      },
+    }),
+  ],
+}