milestone 32: task-shaped configuration, file mode as a rendering, config status api

admin/src/features/configuration/sourceSet.ts

@@ -0,0 +1,11 @@
+export function toggleSource(ids: number[], id: number): number[] {
+	if (ids.includes(id)) return ids.filter((existing) => existing !== id);
+	return [...ids, id].sort((a, b) => a - b);
+}
+
+export function sameSet(a: number[], b: number[]): boolean {
+	if (a.length !== b.length) return false;
+	const sortedA = [...a].sort((x, y) => x - y);
+	const sortedB = [...b].sort((x, y) => x - y);
+	return sortedA.every((value, i) => value === sortedB[i]);
+}