chore: establish learning module baseline

OpenMAIC/tests/pbl/v2/host-rect.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest';
+
+import { rectsEqual, type LayoutRect } from '@/components/scene-renderers/pbl/v2/host-rect';
+
+const base: LayoutRect = { left: 100, top: 50, width: 800, height: 450 };
+
+describe('PBL v2 — rectsEqual (docked host-rect dirty-check)', () => {
+  it('is true for identical rects (idle frame → no re-render)', () => {
+    expect(rectsEqual(base, { ...base })).toBe(true);
+  });
+
+  it('detects a position-only shift (the side-panel re-center bug)', () => {
+    // The 16:9 host box is height-constrained, so toggling a side panel moves
+    // it horizontally without resizing it. This must be seen as a change so the
+    // docked frame follows instead of leaking the box beside it.
+    expect(rectsEqual(base, { ...base, left: 240 })).toBe(false);
+    expect(rectsEqual(base, { ...base, top: 70 })).toBe(false);
+  });
+
+  it('detects a size change', () => {
+    expect(rectsEqual(base, { ...base, width: 900 })).toBe(false);
+    expect(rectsEqual(base, { ...base, height: 506 })).toBe(false);
+  });
+});