TehFridge/SlopCam ? reverse-engineered prompt

Build me a 3DS camera app that feels like a proper little camcorder, with a live viewfinder, photo mode, and video recording with sound.

I want A to switch between photo and video, Y to start and stop recording or take a photo, X to pause and resume while recording, and START to exit cleanly after finishing any save. Photos should save as JPGs and videos as AVI files on the SD card, with file names based on date and time.

In photo mode, let me choose outer camera, inner camera, or both cameras together for a wider 3D style shot, and make the preview look right on the top screen. Add basic camera settings like resolution, exposure, white balance, brightness, saturation, quality, and a self timer. In video mode, support saving audio too, and make recording stable enough that it can pause and resume without breaking the file.

If you need to check current 3DS docs or camera details online, do that.