feat (login page): add a sign in / log in page

app/api/auth/register/route.ts

@@ -0,0 +1,28 @@
+import { NextResponse } from "next/server";
+import bcrypt from "bcryptjs";
+import { prisma } from "@/lib/prisma";
+
+export async function POST(req: Request) {
+    try {
+        const { email, password, name } = await req.json();
+
+        if (!email || !password) {
+            return NextResponse.json({ error: "Email et mot de passe requis" }, { status: 400 });
+        }
+
+        const existing = await prisma.user.findUnique({ where: { email } });
+        if (existing) {
+            return NextResponse.json({ error: "Email déjà utilisé" }, { status: 400 });
+        }
+
+        const hashed = await bcrypt.hash(password, 12);
+
+        const user = await prisma.user.create({
+            data: { email, password: hashed, name },
+        });
+
+        return NextResponse.json({ id: user.id, email: user.email }, { status: 201 });
+    } catch {
+        return NextResponse.json({ error: "Erreur serveur" }, { status: 500 });
+    }
+}