proclamation-categories: sub-category management inline in parent form

- Registry: Remove 'parent.name' from listFields (all shown records
  are top-level with no parent), remove 'parent: true' from include
  since unused
- +page.server.ts: Custom load filters to parentId=null (top-level
  only); custom upsert syncs children (create/update/delete) and
  handles P2002 duplicate-name errors; custom delete cascades to
  children first to avoid FK constraint violations
- CategoryForm.svelte: Replace parentId select dropdown with dynamic
  list of sub-category inputs. Each row has a name field and Remove
  button. Pre-populates from record.children when editing existing
  categories. Add Sub-category button appends new rows
- +page.svelte: Remove unused relationOptionsData prop from
  CategoryForm; rename submit button label from 'Update' to 'Save'
- prisma: Add ProclamationCategorySubscriptionLevel join table
  migration and regenerate client
- General: Update TipTap mock, Toast, license-keys page, proclamations
  server/route tests, README, AGENTS.md, and other admin forms

prisma/migrations/20260708012459_add_category_subscription_level_join/migration.sql

@@ -0,0 +1,19 @@
+-- DropIndex
+DROP INDEX "Proclamation_subscriptionLevelId_idx";
+
+-- AlterTable
+ALTER TABLE "Proclamation" ALTER COLUMN "subscriptionLevelId" DROP DEFAULT;
+
+-- CreateTable
+CREATE TABLE "ProclamationCategorySubscriptionLevel" (
+    "categoryId" INTEGER NOT NULL,
+    "subscriptionLevelId" INTEGER NOT NULL,
+
+    CONSTRAINT "ProclamationCategorySubscriptionLevel_pkey" PRIMARY KEY ("categoryId","subscriptionLevelId")
+);
+
+-- AddForeignKey
+ALTER TABLE "ProclamationCategorySubscriptionLevel" ADD CONSTRAINT "ProclamationCategorySubscriptionLevel_categoryId_fkey" FOREIGN KEY ("categoryId") REFERENCES "ProclamationCategory"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "ProclamationCategorySubscriptionLevel" ADD CONSTRAINT "ProclamationCategorySubscriptionLevel_subscriptionLevelId_fkey" FOREIGN KEY ("subscriptionLevelId") REFERENCES "SubscriptionLevel"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -124,10 +124,8 @@ model Proclamation {
   categoryId           Int
   category             ProclamationCategory @relation(fields: [categoryId], references: [id])
   userProclamations    UserProclamations[]
-  subscriptionLevelId  Int                  @default(1)
+  subscriptionLevelId  Int                  // Keeping old FK for migration stability
   subscriptionLevel    SubscriptionLevel    @relation(fields: [subscriptionLevelId], references: [id])
-
-  @@index(subscriptionLevelId)
 }
 
 model UserProclamations {
@@ -149,16 +147,27 @@ model SolfeggioFrequency {
 }
 
 model ProclamationCategory {
-  id            Int                    @id @default(autoincrement())
-  name          String
-  parentId      Int?
-  parent        ProclamationCategory?  @relation("CategoryHierarchy", fields: [parentId], references: [id])
-  children      ProclamationCategory[] @relation("CategoryHierarchy")
-  proclamations Proclamation[]
+  id               Int                                    @id @default(autoincrement())
+  name             String
+  parentId         Int?
+  parent           ProclamationCategory?                  @relation("CategoryHierarchy", fields: [parentId], references: [id])
+  children         ProclamationCategory[]                 @relation("CategoryHierarchy")
+  proclamations    Proclamation[]
+  subscriptionLevels ProclamationCategorySubscriptionLevel[]
 
   @@unique([parentId, name])
 }
 
+// Join table for ProclamationCategory -> SubscriptionLevel defaults
+model ProclamationCategorySubscriptionLevel {
+  categoryId          Int
+  category            ProclamationCategory @relation(fields: [categoryId], references: [id], onDelete: Cascade)
+  subscriptionLevelId Int
+  subscriptionLevel   SubscriptionLevel    @relation(fields: [subscriptionLevelId], references: [id], onDelete: Cascade)
+
+  @@id([categoryId, subscriptionLevelId])
+}
+
 model LicenseKey {
   id     String  @id @default(uuid())
   key    String  @unique
@@ -169,8 +178,9 @@ model LicenseKey {
 }
 
 model SubscriptionLevel {
-  id Int @id @default(autoincrement())
-  name String
-  description String?
+  id            Int                                    @id @default(autoincrement())
+  name          String
+  description   String?
   proclamations Proclamation[]
+  categoryLevels ProclamationCategorySubscriptionLevel[]
 }