pandasuryanarayan/App-Lock ? reverse-engineered prompt

Build me an Android app locker that feels modern and simple to use.

I want it to let me pick which apps are protected, then show a lock screen whenever I open one of them. The unlock options should include a 4 digit PIN, a pattern lock, a password, and fingerprint or face unlock if the phone supports it. It should also watch the foreground app so it can lock protected apps right away, without killing anything in the background.

Please make the interface clean and dark, with a polished Material look, and keep everything working fully offline. I also want a secure vault inside the app for private notes or passwords, plus a history screen that shows failed unlock attempts with timestamps and the app name. Include the needed Android permissions flow, especially usage access and draw over other apps, and make it easy for users to enable them.

If you need to check current Android docs while building it, go ahead and look them up online.