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/routes/(protected)/(user)/dashboard/+page.server.ts

@@ -7,19 +7,16 @@ export const load: PageServerLoad = async ({ locals }) => {
 		throw error(403, 'not authorized');
 	}
 
-	const profile = await prisma.profile.findUnique({
+	const profile = await prisma.profile.findFirst({
 		where: { userId: locals.user.id },
 		select: { firstName: true }
 	});
 
-	const [keyStats, proclamationCount] = await Promise.all([
-		prisma.licenseKey.groupBy({
-			by: ['active'],
-			where: { userId: locals.user.id },
-			_count: true
-		}),
-		prisma.proclamation.count()
-	]);
+	const keyStats = await prisma.licenseKey.groupBy({
+		by: ['active'],
+		where: { userId: locals.user.id },
+		_count: true
+	});
 
 	const activeKeys = keyStats.find((s) => s.active)?._count ?? 0;
 	const totalKeys = keyStats.reduce((sum, s) => sum + s._count, 0);
@@ -27,7 +24,6 @@ export const load: PageServerLoad = async ({ locals }) => {
 	return {
 		firstName: profile?.firstName ?? 'User',
 		activeKeys,
-		totalKeys,
-		proclamationCount
+		totalKeys
 	};
 };