fix: resolve workspace integration blockers (#5)

tests/public-asset-url.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from 'vitest';
+import { publicAssetUrl } from '../apps/viewer-3d/src/runtimeBase';
+
+describe('3D public asset URL', () => {
+  it('keeps decoder and preview assets under the configured deployment subpath', () => {
+    expect(publicAssetUrl('draco/', '/viewer-3d/', 'https://viewer.example')).toBe(
+      'https://viewer.example/viewer-3d/draco/',
+    );
+    expect(publicAssetUrl('/previews/Box.webp', '/viewer-3d/', 'https://viewer.example')).toBe(
+      'https://viewer.example/viewer-3d/previews/Box.webp',
+    );
+  });
+});