Slow sim to 1× on landing and resume last selected speed (ISS-057, v0.30.0)

app/api/sim/route.test.ts

@@ -2,6 +2,8 @@ import fs from 'node:fs/promises';
 import os from 'node:os';
 import path from 'node:path';
 import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import { getGameDb } from '@/lib/db/client';
+import * as schema from '@/lib/db/schema';
 import { POST } from './route';
 
 let dir: string;
@@ -84,6 +86,21 @@ describe('POST /api/sim', () => {
     await post({ timeScale: 1, paused: false }); // restore
   });
 
+  it('records lastSelectedTimeScale when timeScale is posted; a paused-only post leaves it untouched (ISS-057)', async () => {
+    const inst = await getGameDb(); // same singleton the route's applyTimeControls writes through
+    const row = async () => (await inst.db.select().from(schema.simState))[0];
+
+    await post({ timeScale: 250 });
+    expect((await row()).lastSelectedTimeScale).toBe(250); // manual intent recorded…
+
+    await post({ paused: true });
+    expect((await row()).paused).toBe(true);
+    expect((await row()).lastSelectedTimeScale).toBe(250); // …and a {paused}-only post does not touch it
+
+    await post({ timeScale: 1, paused: false }); // restore
+    expect((await row()).lastSelectedTimeScale).toBe(1);
+  });
+
   it('rejects invalid input with 400', async () => {
     for (const body of [{ timeScale: 'fast' }, { timeScale: Infinity }, { paused: 'yes' }, { bogus: 1 }]) {
       const res = await post(body);