Digital Asset Links (assetlinks.json) are only needed if you distribute the optional
Android APK from twa-concept-maths/ and want full-screen Trusted Web Activity.

For normal PWA install from Chrome/Safari, this file is not required.
Use an empty array [] or omit Play Store signing setup.

See docs/PWA-CHECKLIST.md and twa-concept-maths/README.md (if present).
