feat: pagina contatti e api email con validazione testata

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/lib/mailer.ts

@@ -0,0 +1,25 @@
+import nodemailer from 'nodemailer';
+import { getEnv } from './env';
+import type { ContactData } from './contact';
+
+export async function sendContactEmail(data: ContactData): Promise<void> {
+  const transporter = nodemailer.createTransport({
+    host: getEnv('SMTP_HOST'),
+    port: Number(getEnv('SMTP_PORT', '587')),
+    secure: Number(getEnv('SMTP_PORT', '587')) === 465,
+    auth: { user: getEnv('SMTP_USER'), pass: getEnv('SMTP_PASS') },
+  });
+  await transporter.sendMail({
+    from: getEnv('CONTACT_FROM'),
+    to: getEnv('CONTACT_TO', 'info@insanitylab.it'),
+    replyTo: data.email,
+    subject: `Nuovo contatto dal sito: ${data.firstName} ${data.lastName}`.trim(),
+    text: [
+      `Nome: ${data.firstName} ${data.lastName}`.trim(),
+      data.phone && `Telefono: ${data.phone}`,
+      `E-mail: ${data.email}`,
+      '',
+      data.message,
+    ].filter(Boolean).join('\n'),
+  });
+}