feat: add play apps and layout tools

tests/layoutDraw/layoutDrawStorage.test.ts

@@ -0,0 +1,46 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  normalizeSavedLayoutDrawShapes,
+  serializeSavedLayoutDrawShapes,
+} from '../../src/features/layout/draw/layoutDrawStorageShapes.ts';
+import type { DrawShape } from '../../src/features/layout/draw/layoutDrawTypes.ts';
+
+function createShapes(): DrawShape[] {
+  return [
+    {
+      id: 'line-1',
+      type: 'line',
+      x1: 0,
+      y1: 0,
+      x2: 0,
+      y2: 120,
+      orientation: 'vertical',
+      label: '',
+    },
+    {
+      id: 'region-1',
+      type: 'region',
+      regionKey: '0:0',
+      label: '거실',
+      fillColor: '#dbeafe',
+    },
+  ];
+}
+
+test('serializes saved draw shapes into a JSON string for jsonb insert payloads', () => {
+  const serialized = serializeSavedLayoutDrawShapes(createShapes());
+
+  assert.equal(typeof serialized, 'string');
+  assert.deepEqual(JSON.parse(serialized), createShapes());
+});
+
+test('normalizes stringified jsonb array values back into shape arrays', () => {
+  const normalized = normalizeSavedLayoutDrawShapes(JSON.stringify(createShapes()));
+
+  assert.deepEqual(normalized, createShapes());
+});
+
+test('falls back to an empty array for malformed saved draw shapes', () => {
+  assert.deepEqual(normalizeSavedLayoutDrawShapes('{bad json'), []);
+});