fix: remove disruptive TurboStarter promo dialog and fix horizontal overflow

- Remove BuyCtaDialog import/usage from root layout (TurboStarter boilerplate promo)
- Add overflow-x-hidden on html and body to prevent right-side empty space
- Add w-full on body for proper full-width stretching

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/app/[locale]/layout.tsx

@@ -7,7 +7,6 @@ import { Providers } from "~/lib/providers/providers";
 import { ImpersonatingBanner } from "~/modules/admin/users/user/impersonating-banner";
 import { BaseLayout } from "~/modules/common/layout/base";
 import { Toaster } from "~/modules/common/toast";
-import { BuyCtaDialog } from "~/modules/marketing/layout/buy-cta-dialog";
 
 export function generateStaticParams() {
   return config.locales.map((locale) => ({ locale }));
@@ -33,7 +32,6 @@ export default async function RootLayout({
       <Providers locale={locale}>
         <ImpersonatingBanner />
         {children}
-        <BuyCtaDialog />
         <Toaster />
       </Providers>
     </BaseLayout>