chore: v2.8.73 — Artifacts folder bar restyled; hidden live profile gets a stand-in

- Artifacts: folders are rounded chips with a count badge; rename/delete are
  icons beside the picked folder (double-click renames); New folder is a
  dashed chip; the empty-folder hint mentions drag and drop.
- GET /api/pricing/quota: every Claude row carries its accountUuid.
- Settings → Profiles and the status bar's Usage panel: a profile hidden in
  this browser is left out of the Usage panel too; when the live login is
  hidden, the first visible profile is shown in its place (Logged in now,
  "in use", the % used chip with that profile's own usage). Display only.

server/__tests__/quota.test.js

@@ -281,6 +281,8 @@ test("the live row is the account its token belongs to, not the one .claude.json
     assert.strictEqual(live.label, "Victor");
     assert.strictEqual(live.account, "victor@x.y");
     assert.strictEqual(live.ownerUuid, undefined);
+    assert.strictEqual(live.accountUuid, "uuid-v");
+    assert.ok(claude.filter((t) => !t.active).every((t) => "accountUuid" in t));
     assert.strictEqual(live.plan, "Max");
     assert.deepStrictEqual(
       claude.filter((t) => !t.active).map((t) => t.label),