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

package.json

@@ -42,6 +42,7 @@
 		"svelte": "^5.45.6",
 		"svelte-check": "^4.3.4",
 		"tailwindcss": "^4.1.17",
+		"tsx": "^4.23.0",
 		"typescript": "^5.9.3",
 		"typescript-eslint": "^8.48.1",
 		"vite": "^7.2.6",
@@ -52,10 +53,15 @@
 		"@prisma/adapter-pg": "^7.2.0",
 		"@prisma/client": "^7.2.0",
 		"@tiptap/core": "^3.15.3",
+		"@tiptap/extension-color": "^3.27.3",
+		"@tiptap/extension-highlight": "^3.27.3",
+		"@tiptap/extension-text-style": "^3.27.3",
 		"@tiptap/starter-kit": "^3.15.3",
 		"better-auth": "^1.4.10",
 		"dotenv": "^17.2.3",
 		"pg": "^8.16.3",
-		"resend": "^6.17.1"
+		"resend": "^6.17.1",
+		"sveltekit-superforms": "^2.30.2",
+		"zod": "^4.4.3"
 	}
 }