the hive dashboard uses the swarm UI's links menu, beside the profile avatar

The links menu moves into @hive/shared and takes its links as a prop. The swarm
UI feeds it /api/links as before; the dashboard feeds it stats, API docs and the
swarm, and mounts it next to the profile menu in place of its own hamburger on
the left. A link opens in a new tab unless its entry says it is a page of the
same site.

frontend/packages/swarm-ui/test/links-menu.test.mjs

@@ -0,0 +1,23 @@
+// How a link in the links menu opens. Run by `npm test`, which Node runs with
+// its built-in test runner and type stripping.
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { linkAttrs } from "../../shared/src/links-menu/links.ts";
+
+test("a link the menu was handed opens in a new tab, without a referrer", () => {
+  assert.deepEqual(linkAttrs({ label: "forge", url: "https://forge.x" }), {
+    target: "_blank",
+    rel: "noreferrer",
+  });
+  assert.deepEqual(
+    linkAttrs({ label: "forge", url: "https://forge.x", external: true }),
+    { target: "_blank", rel: "noreferrer" },
+  );
+});
+
+test("a page of the same site opens in place", () => {
+  assert.deepEqual(
+    linkAttrs({ label: "stats", url: "/stats.html", external: false }),
+    {},
+  );
+});