feat: sessão #3 — lib (db/auth/email/validations), API routes, NextAuth v5, middleware, páginas account/shelters/shelter-dashboard, Prisma v7 fix

app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,3 @@
+import { handlers } from '@/lib/auth/config';
+
+export const { GET, POST } = handlers;

app/api/auth/register/route.ts

@@ -0,0 +1,56 @@
+import { NextResponse } from 'next/server';
+import { prisma } from '@/lib/db/prisma';
+import { registerSchema } from '@/lib/validations/auth';
+import { hashPassword } from '@/lib/auth/password';
+import { validateAge } from '@/lib/auth/age-validation';
+import { sendEmail, buildWelcomeHtml } from '@/lib/email';
+
+export async function POST(request: Request) {
+  const body = await request.json();
+  const parsed = registerSchema.safeParse(body);
+
+  if (!parsed.success) {
+    const errors = parsed.error.flatten().fieldErrors;
+    const firstError = Object.values(errors).flat()[0];
+    return NextResponse.json({ error: firstError ?? 'Dados inválidos.' }, { status: 400 });
+  }
+
+  const { name, email, password, birthdate, district } = parsed.data;
+
+  // Validação de +18 sempre no servidor
+  const ageCheck = validateAge(birthdate);
+  if (!ageCheck.valid) {
+    return NextResponse.json({ error: ageCheck.error }, { status: 400 });
+  }
+
+  // Verificar se email já existe
+  const existing = await prisma.user.findUnique({ where: { email } });
+  if (existing) {
+    return NextResponse.json({ error: 'Este email já está registado.' }, { status: 409 });
+  }
+
+  const hashedPassword = await hashPassword(password);
+
+  const user = await prisma.user.create({
+    data: {
+      name,
+      email,
+      password:  hashedPassword,
+      birthdate: new Date(birthdate),
+      district,
+    },
+    select: { id: true, name: true, email: true },
+  });
+
+  // Email de boas-vindas (não bloqueia)
+  sendEmail({
+    to:      user.email,
+    subject: 'Bem-vindo à PawLink 🐾',
+    html:    buildWelcomeHtml({ userName: user.name }),
+  }).catch(console.error);
+
+  return NextResponse.json(
+    { message: 'Conta criada com sucesso.', userId: user.id },
+    { status: 201 }
+  );
+}