Feat: Add hierarchical category support for menu organization

Added parent-child relationship to categories, allowing organization
of categories into submenus (e.g., Apparel > Adults, Kids, Babies).

Changes:
- Add parentId field to Category model
- Create foreign key relationship for category hierarchy
- Update homepage to query only top-level categories (parentId = null)
- Include children categories for future use in category menus

Database migration:
- Adds parentId column to Category table
- Sets up CASCADE delete to remove children when parent is deleted

This enables menu structure like:
  Apparel
    - Adults
    - Kids
    - Babies
  Drinkware
  Phone Cases
  etc.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -135,7 +135,14 @@
       "Bash(GIT_TRACE=1 git push origin main --force)",
       "Bash(pkill -f \"node.exe\")",
       "PowerShell(Stop-Process -Name node -Force -ErrorAction SilentlyContinue)",
-      "Bash(find \"D:\\\\Craft2Prints\\\\src\\\\app\" -path \"*/\\\\[slug\\\\]/*\" -name \"page.tsx\" | head -10)"
+      "Bash(find \"D:\\\\Craft2Prints\\\\src\\\\app\" -path \"*/\\\\[slug\\\\]/*\" -name \"page.tsx\" | head -10)",
+      "Read(//c/Users/Lyons/OneDrive/Desktop/Products/AWD T Shirts/**)",
+      "Read(//c/Users/Lyons/OneDrive/Desktop/Products/**)",
+      "Bash(mv AT001B_* \"Polo T Shirts/\")",
+      "Bash(mv AT001M_* \"Polo T Shirts/\")",
+      "Bash(mv AT002B_* \"Striped collar/\")",
+      "Bash(mv AT002M_* \"Striped collar/\")",
+      "Bash(cd \"/c/Users/Lyons/OneDrive/Desktop/Products/AWD T Shirts\" *)"
     ]
   }
 }

prisma/migrations/20260721175000_add_parent_category_support/migration.sql

@@ -0,0 +1,5 @@
+-- AlterTable
+ALTER TABLE "Category" ADD COLUMN "parentId" TEXT;
+
+-- AddForeignKey
+ALTER TABLE "Category" ADD CONSTRAINT "Category_parentId_fkey" FOREIGN KEY ("parentId") REFERENCES "Category"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -10,10 +10,14 @@ datasource db {
 // Categories are their own table so you can add/rename/remove them from the admin
 // panel. Product.category stays a plain string (matching Category.slug) rather
 // than a foreign key, so nothing breaks if a category is renamed after the fact.
+// Categories can be hierarchical: parentId links to a parent category.
 model Category {
   id        String   @id @default(cuid())
   name      String // display label, e.g. "Phone Cases"
   slug      String   @unique // stored key, e.g. "PHONE_CASE" — matches Product.category
+  parentId  String? // parent category ID for hierarchical organization (e.g., "Apparel - Adults" has parent "Apparel")
+  parent    Category? @relation("CategoryHierarchy", fields: [parentId], references: [id], onDelete: Cascade)
+  children  Category[] @relation("CategoryHierarchy")
   showOnPersonalised Boolean @default(true) // appears as a filter on /made-to-order
   showOnProducts     Boolean @default(true) // appears as a filter on /products
   createdAt DateTime @default(now())

src/app/page.tsx

@@ -40,8 +40,9 @@ export default async function HomePage() {
   const readyMadeCount = readyMade.length;
 
   const categoryRows = await prisma.category.findMany({
-    where: { showOnPersonalised: true },
+    where: { showOnPersonalised: true, parentId: null },
     orderBy: { name: 'asc' },
+    include: { children: { orderBy: { name: 'asc' } } },
   });
   const categories = categoryRows.map((c) => ({ label: c.name, value: c.slug }));