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

prisma/migrations/20260707182814_profiles_address_three_defaults/migration.sql

@@ -0,0 +1,11 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `isDefault` on the `Address` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "Address" DROP COLUMN "isDefault",
+ADD COLUMN     "isDefaultBilling" BOOLEAN NOT NULL DEFAULT false,
+ADD COLUMN     "isDefaultMailing" BOOLEAN NOT NULL DEFAULT false,
+ADD COLUMN     "isDefaultShipping" BOOLEAN NOT NULL DEFAULT false;