Shourya-GOT/HoloKey ? reverse-engineered prompt

Build me a local network app that turns my phone into a wireless keyboard and trackpad for a Windows PC.

I want to open a webpage on my phone, connect to my PC over the same Wi Fi, and then control the computer with a compact 60 percent keyboard layout plus a touch trackpad. It should support normal typing, modifier keys, shortcut keys, an Fn layer for arrows and function keys, and mouse actions like moving the cursor, left and right click, scrolling, and drag. I also want a split mode where one side of the phone is the keyboard and the other side is the trackpad, plus keyboard only and trackpad only modes.

Please include a clean mobile friendly interface, typing preview, basic sound and visual settings, and automatic reconnect if the connection drops. Keep it lightweight, private, and limited to the local network, with a simple Windows setup and start process. If you need to check anything current, look up the latest docs online first.