admin: Superforms + Zod validation, three-address-defaults schema, profiles toast fix

- Add Superforms + Zod 4 for all admin form validation
- Replace address isDefault with three separate boolean defaults (Mailing, Billing, Shipping)
- Update profiles page with three-checkbox address form and toast improvements
- Convert all admin page server actions to pass request directly to crud
- Export superFormErrorsToFieldErrors helper for profiles server actions
- Regenerate Prisma client for new schema fields

src/app.d.ts

@@ -1,4 +1,4 @@
-import type { Session, User } from "better-auth";
+import type { Session, User } from 'better-auth';
 
 declare global {
 	namespace App {
@@ -9,4 +9,4 @@ declare global {
 	}
 }
 
-export { };
+export {};