swarm-ui: repoint the HivesPage comments at HivesCard and pin the nav filter and lazy roster

frontend/packages/swarm-ui/test/lazy-open.test.mjs

@@ -0,0 +1,16 @@
+// A folded card fetches nothing until first opened. Run by `npm test`.
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { builtAfterToggle } from "../src/pages/agents/lazy-open.ts";
+
+test("a card nobody opened is not built", () => {
+  assert.equal(builtAfterToggle(false, false), false);
+});
+
+test("the first open builds it", () => {
+  assert.equal(builtAfterToggle(false, true), true);
+});
+
+test("closing it afterwards keeps it built", () => {
+  assert.equal(builtAfterToggle(true, false), true);
+});