i2cjak/Chudx_Nano_100 ? reverse-engineered prompt

Build me a compact open source macropad based on this repository, with a clean keyboard style PCB and a separate USB daughterboard for the connector area. I want the full KiCad project to be usable and consistent, with the schematic, PCB, and symbols all connected properly, and the board laid out so it would actually be practical to manufacture and assemble.

Make sure the key layout, LEDs, and USB connection are all wired in a sensible way, and that the design looks polished and complete rather than just a rough draft. If anything is unclear from the existing files, inspect the project and fill in the gaps in a reasonable way, then tidy up the design so it is ready for fabrication. If you need current KiCad guidance or component details, look them up online.