Q159: the home page's recent runs are the newest ones

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/unit/newest-runs.test.ts

@@ -0,0 +1,10 @@
+import { describe, expect, test } from "vitest";
+import { newestRuns } from "../../src/renderer/src/pages/runs/newest-runs";
+
+describe("the home page's recent runs", () => {
+  test("are the newest ones, newest first, from the snapshot's oldest-first list", () => {
+    const runs = Array.from({ length: 10 }, (_, index) => ({ id: `run_${index}` }));
+    expect(newestRuns(runs, 3).map((run) => run.id)).toEqual(["run_9", "run_8", "run_7"]);
+    expect(newestRuns(runs.slice(0, 2), 6).map((run) => run.id)).toEqual(["run_1", "run_0"]);
+  });
+});