refactor: abstract site URL across email templates

- Add NEXT_PUBLIC_SITE_URL to .env.local
- Update email templates to accept siteUrl prop
- Update webhook handler to pass siteUrl from env var
- Update create-webhooks.graphql with placeholder URL

src/emails/BaseLayout.tsx

@@ -16,6 +16,7 @@ interface BaseLayoutProps {
   children: React.ReactNode;
   previewText: string;
   language: string;
+  siteUrl: string;
 }
 
 const translations: Record<string, { footer: string; company: string }> = {
@@ -37,7 +38,7 @@ const translations: Record<string, { footer: string; company: string }> = {
   },
 };
 
-export function BaseLayout({ children, previewText, language }: BaseLayoutProps) {
+export function BaseLayout({ children, previewText, language, siteUrl }: BaseLayoutProps) {
   const t = translations[language] || translations.en;
 
   return (
@@ -48,7 +49,7 @@ export function BaseLayout({ children, previewText, language }: BaseLayoutProps)
         <Container style={styles.container}>
           <Section style={styles.logoSection}>
             <Img
-              src="https://manoonoils.com/logo.png"
+              src={`${siteUrl}/logo.png`}
               width="150"
               height="auto"
               alt="ManoonOils"