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/schema.prisma

@@ -47,16 +47,18 @@ model Profile {
 }
 
 model Address {
-  id         String  @id @default(uuid())
-  profileId  String
-  profile    Profile @relation(fields: [profileId], references: [id], onDelete: Cascade)
-  street     String
-  city       String
-  state      String
-  postalCode String
-  country    String
-  type       String  @default("Mailing")
-  isDefault  Boolean @default(false)
+  id                 String  @id @default(uuid())
+  profileId          String
+  profile            Profile @relation(fields: [profileId], references: [id], onDelete: Cascade)
+  street             String
+  city               String
+  state              String
+  postalCode         String
+  country            String
+  type               String  @default("Mailing")
+  isDefaultMailing   Boolean @default(false)
+  isDefaultBilling   Boolean @default(false)
+  isDefaultShipping  Boolean @default(false)
 }
 
 model Session {