Android Sudoku via Darvin.dev (vibe coding tool)

I’d like a straightforward, classic-looking Sudoku app built entirely inside Darvin.dev (MUST REQUIREMENT) and exported source code for Android only.

Deliverables
• Complete Darvin.dev project folder ready to clone or import
• Signed or unsigned APK for quick testing on Android 10+
• One-page README with build/run steps and any third-party libraries noted