checkpoint ISAC registries and system monitoring

src/lib/server/pagination.test.ts

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+import { describe, expect, it } from 'vitest';
+import { getPagination, getRegistrySort } from './pagination.js';
+
+const options = {
+	name: { asc: 'name ASC', desc: 'name DESC' },
+	updated: { asc: 'updated_at ASC', desc: 'updated_at DESC', defaultDirection: 'desc' as const }
+};
+
+describe('getRegistrySort', () => {
+	it('returns only allowlisted sort expressions', () => {
+		const url = new URL('https://shd.build/isac/attributes?sort=name&direction=desc');
+		expect(getRegistrySort(url, options, 'name')).toEqual({
+			key: 'name',
+			direction: 'desc',
+			orderBy: 'name DESC'
+		});
+	});
+
+	it('falls back for unknown keys and directions', () => {
+		const url = new URL('https://shd.build/isac/attributes?sort=DROP%20TABLE&direction=sideways');
+		expect(getRegistrySort(url, options, 'updated')).toEqual({
+			key: 'updated',
+			direction: 'desc',
+			orderBy: 'updated_at DESC'
+		});
+	});
+
+	it('supports namespaced registry parameters', () => {
+		const url = new URL('https://shd.build/isac/users/1?loginSort=name&loginDirection=asc');
+		expect(getRegistrySort(url, options, 'updated', 'desc', 'login')).toMatchObject({
+			key: 'name',
+			direction: 'asc'
+		});
+	});
+});
+
+describe('getPagination', () => {
+	it('keeps supported row counts and clamps the selected page', () => {
+		const url = new URL('https://shd.build/isac/attributes?perPage=50&page=9');
+		expect(getPagination(url, 75)).toMatchObject({ perPage: 50, page: 2, pageCount: 2 });
+	});
+});