feat: support disable newsletter module

src/components/newsletter/newsletter-card.tsx

@@ -1,10 +1,16 @@
 'use client';
 
 import { NewsletterForm } from '@/components/newsletter/newsletter-form';
+import { websiteConfig } from '@/config/website';
 import { useTranslations } from 'next-intl';
 import { HeaderSection } from '../layout/header-section';
 
 export function NewsletterCard() {
+  // show nothing if newsletter is disabled
+  if (!websiteConfig.newsletter.enable) {
+    return null;
+  }
+
   const t = useTranslations('Newsletter');
 
   return (

src/components/settings/notification/newsletter-form-card.tsx

@@ -20,6 +20,7 @@ import {
   FormLabel,
 } from '@/components/ui/form';
 import { Switch } from '@/components/ui/switch';
+import { websiteConfig } from '@/config/website';
 import { authClient } from '@/lib/auth-client';
 import { cn } from '@/lib/utils';
 import { zodResolver } from '@hookform/resolvers/zod';
@@ -40,6 +41,11 @@ interface NewsletterFormCardProps {
  * Allows users to toggle their newsletter subscription status
  */
 export function NewsletterFormCard({ className }: NewsletterFormCardProps) {
+  // show nothing if newsletter is disabled
+  if (!websiteConfig.newsletter.enable) {
+    return null;
+  }
+
   const t = useTranslations('Dashboard.settings.notification');
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState<string | undefined>('');

src/config/website.tsx

@@ -81,6 +81,7 @@ export const websiteConfig: WebsiteConfig = {
     supportEmail: 'MkSaaS <support@mksaas.com>',
   },
   newsletter: {
+    enable: true,
     provider: 'resend',
     autoSubscribeAfterSignUp: true,
   },

src/lib/auth.ts

@@ -164,7 +164,11 @@ export function getLocaleFromRequest(request?: Request): Locale {
 async function onCreateUser(user: User) {
   // Auto subscribe user to newsletter after sign up if enabled in website config
   // Add a delay to avoid hitting Resend's 1 email per second limit
-  if (user.email && websiteConfig.newsletter.autoSubscribeAfterSignUp) {
+  if (
+    user.email &&
+    websiteConfig.newsletter.enable &&
+    websiteConfig.newsletter.autoSubscribeAfterSignUp
+  ) {
     // Delay newsletter subscription by 2 seconds to avoid rate limiting
     // This ensures the email verification email is sent first
     // Using 2 seconds instead of 1 to provide extra buffer for network delays

src/types/index.d.ts

@@ -137,6 +137,7 @@ export interface MailConfig {
  * Newsletter configuration
  */
 export interface NewsletterConfig {
+  enable: boolean;                   // Whether to enable the newsletter
   provider: 'resend';                 // The newsletter provider, only resend is supported for now
   autoSubscribeAfterSignUp?: boolean; // Whether to automatically subscribe users to the newsletter after sign up
 }