Valkirie/HandheldCompanion — reverse-engineered prompt

Build me a Windows 10 and 11 app called Handheld Companion for gaming handhelds like the ROG Ally, Legion Go, Steam Deck on Windows, GPD Win, AYA Neo, and similar devices. I want a touch friendly interface that makes handheld gaming easier, with gyro and motion controls from the built in sensors or a supported USB sensor, plus presets that work well for racing games, shooters, and emulators.

It should have a quick overlay I can open while playing to change things like TDP, auto TDP, GPU related settings, screen refresh rate, frame limit, resolution, brightness, volume, power mode, and battery info. I also want virtual controller support for Xbox 360 and DualShock 4, button remapping to keyboard and mouse, deadzone tuning, hotkeys, automatic game detection with per game profiles, PS Remote Play support with touchpad and motion, and a 3D controller overlay for recordings or streaming. Keep it polished and easy to use, and look up current docs online if you need to.