Restore EmailProvider server config required by NextAuth validation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/auth.ts

@@ -19,6 +19,16 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
   providers: [
     // Email provider for magic links (used for first login and password reset)
     EmailProvider({
+      // Server config required by NextAuth validation but not used —
+      // sendVerificationRequest below fully overrides email sending via getTransporter()
+      server: {
+        host: process.env.SMTP_HOST || 'localhost',
+        port: Number(process.env.SMTP_PORT || 587),
+        auth: {
+          user: process.env.SMTP_USER || '',
+          pass: process.env.SMTP_PASS || '',
+        },
+      },
       from: process.env.EMAIL_FROM || 'MOPC Platform <noreply@monaco-opc.com>',
       maxAge: parseInt(process.env.MAGIC_LINK_EXPIRY || '900'), // 15 minutes
       sendVerificationRequest: async ({ identifier: email, url }) => {