fix(web): wire up inquiry modal toast notification on listing detail page

The "Nhắn tin" button's inquiry modal now shows a success toast via
sonner after submission instead of an in-dialog success state, and
closes the modal automatically. Added sonner as a dependency and
mounted <Toaster> in the root locale layout.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

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

@@ -3,6 +3,7 @@ import { Inter } from 'next/font/google';
 import { notFound } from 'next/navigation';
 import { NextIntlClientProvider } from 'next-intl';
 import { getMessages, getTranslations } from 'next-intl/server';
+import { Toaster } from 'sonner';
 import { AuthProvider } from '@/components/providers/auth-provider';
 import { NotificationsProvider } from '@/components/providers/notifications-provider';
 import { QueryProvider } from '@/components/providers/query-provider';
@@ -124,6 +125,7 @@ export default async function LocaleLayout({
             <QueryProvider>
               <AuthProvider>
                 <NotificationsProvider>
+                  <Toaster position="top-right" richColors closeButton />
                   <WebVitals />
                   {children}
                 </NotificationsProvider>