fix: debug SMTP configuration and disable TLS certificate verification, and update Next.js route type path

lib/mail.ts

@@ -1,5 +1,11 @@
 import nodemailer from 'nodemailer';
 
+console.log('SMTP Config:', {
+  host: process.env.SMTP_HOST,
+  port: process.env.SMTP_PORT,
+  secure: process.env.SMTP_SECURE,
+  user: process.env.SMTP_USER
+});
 const transporter = nodemailer.createTransport({
   host: process.env.SMTP_HOST,
   port: parseInt(process.env.SMTP_PORT || '587'),
@@ -8,6 +14,9 @@ const transporter = nodemailer.createTransport({
     user: process.env.SMTP_USER,
     pass: process.env.SMTP_PASS,
   },
+  tls: {
+    rejectUnauthorized: false
+  }
 });
 
 export const sendEmail = async ({ to, subject, html }: { to: string; subject: string; html: string }) => {