Rebuild admin pages around DataTable/AdminModal; restructure categories/groups and v2 groups API

Remove the generic $lib/svelte-admin CRUD layer and AdminTable.svelte; each
admin route now owns its own form/modal logic. Add DataTable.svelte,
superform-errors.ts, and profile-specific modal/field components.

Flatten proclamation categories/groups and drop subscription levels; add the
v2 groups API; update v1/v2 endpoints, serializers, auth, and regenerated
Prisma client with the new migrations.

Document the overhaul plan in docs/ADMIN_OVERHAUL.md.

src/lib/server/v2-serializers.ts

@@ -55,8 +55,8 @@ export type V2Proclamation = {
 	name: string;
 	content: string;
 	categoryId: number;
+	groupId: number;
 	solfeggioFrequencyId: number;
-	subscriptionLevelId: number | null;
 	colorPalette?: string[];
 };
 
@@ -65,7 +65,7 @@ export type ProclamationWithFrequency = {
 	name: string;
 	content: string;
 	categoryId: number;
-	subscriptionLevelId: number | null;
+	groupId: number;
 	solfeggioFrequency: { value: number };
 };
 
@@ -83,8 +83,8 @@ export function serializeProclamation(
 		name: p.name,
 		content: p.content,
 		categoryId: p.categoryId,
-		solfeggioFrequencyId,
-		subscriptionLevelId: p.subscriptionLevelId
+		groupId: p.groupId,
+		solfeggioFrequencyId
 	};
 
 	if (palette && palette.length > 0) {
@@ -98,53 +98,32 @@ export type V2Category = {
 	id: number;
 	name: string;
 	sortOrder: number;
-	parentId: number | null;
 };
 
-export function serializeCategory(c: {
+export function serializeCategory(c: { id: number; name: string; sortOrder: number }): V2Category {
+	return { id: c.id, name: c.name, sortOrder: c.sortOrder };
+}
+
+export type V2Group = {
 	id: number;
 	name: string;
 	sortOrder: number;
-	parentId: number | null;
-}): V2Category {
-	return { id: c.id, name: c.name, sortOrder: c.sortOrder, parentId: c.parentId };
-}
-
-export type V2SubscriptionLevel = {
-	id: number;
-	name: string;
-	description: string | null;
 };
 
-export function serializeSubscriptionLevel(level: {
-	id: number;
-	name: string;
-	description: string | null;
-}): V2SubscriptionLevel {
-	return { id: level.id, name: level.name, description: level.description };
+export function serializeGroup(g: { id: number; name: string; sortOrder: number }): V2Group {
+	return { id: g.id, name: g.name, sortOrder: g.sortOrder };
 }
 
 export type V2License = {
 	key: string;
 	email_address: string;
-	subscription_level: { id: number | null; name: string; description: string | null };
 };
 
-/** Build the POST /license response. `subscription_level` is always an object;
- * when no SubscriptionLevel row matches the license's level name, fall back to
- * a structurally consistent object with a null id/description. */
-export function serializeLicense(opts: {
-	key: string;
-	emailAddress: string;
-	levelName: string;
-	level: { id: number; name: string; description: string | null } | null;
-}): V2License {
+/** Build the POST /license response. */
+export function serializeLicense(opts: { key: string; emailAddress: string }): V2License {
 	return {
 		key: opts.key,
-		email_address: opts.emailAddress,
-		subscription_level: opts.level
-			? { id: opts.level.id, name: opts.level.name, description: opts.level.description }
-			: { id: null, name: opts.levelName, description: null }
+		email_address: opts.emailAddress
 	};
 }