test(design): expose video preparation and playback flow gaps

scripts/diagnostics/vitest.design-flow.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+import base from '../../vitest.config';
+
+export default defineConfig({
+  ...base,
+  test: {
+    ...base.test,
+    include: ['scripts/diagnostics/design-video-flow.test.tsx'],
+    testTimeout: 20000,
+  },
+});