Show live and historical turn activity trace (model, pack, steps) (0.15.17).

Co-authored-by: Cursor <cursoragent@cursor.com>

test/activity.test.js

@@ -0,0 +1,19 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { slimActivityTrace } from '../src/activity.js';
+
+describe('activity.js', () => {
+  it('slimActivityTrace keeps model/pack steps for history', () => {
+    const slim = slimActivityTrace({
+      title: 'Готово',
+      context: { model: 'qwen3:8b', pack: 'ordinary', persona: 'neutral' },
+      steps: [
+        { id: 'model', kind: 'model', label: 'Модель', detail: 'qwen3:8b', status: 'done' },
+        { id: 'generate', kind: 'generate', label: 'Generate', detail: 'ok', status: 'done' },
+      ],
+    });
+    assert.ok(slim);
+    assert.equal(slim.context.model, 'qwen3:8b');
+    assert.equal(slim.steps.length, 2);
+  });
+});