chore: bulk commit of pre-existing changes

Includes:
- Admin dashboard layout and page updates
- API account auth module (routes, schemas, service)
- Dashboard sign-up form extraction, middleware refactor
- Marketplace proxy and middleware updates
- CORS origins expansion for dev environment
- Seed email domain correction (.com → .ma)
- Docs: create-account guide, fleet page, signup plan
- Various UI component and layout refinements

apps/dashboard/src/app/layout.tsx

@@ -14,6 +14,11 @@ const jetbrainsMono = JetBrains_Mono({
 export const metadata: Metadata = {
   title: 'RentalDriveGo Dashboard',
   description: 'Manage your rental car business',
+  icons: {
+    icon: '/dashboard/icon.svg',
+    shortcut: '/dashboard/icon.svg',
+  },
+
 }
 
 function resolveInitialLanguage(value: string | undefined): 'en' | 'fr' | 'ar' {