azutake/az-stancekit — reverse-engineered prompt

Build me a modern FiveM stance kit script for a QBCore server. I want players to use an item or menu to open a clean car stance UI where they can adjust their vehicle stance in a simple way, with relative adjustments instead of confusing raw numbers.

The UI should feel fast and polished, and it should clearly show which options can and cannot be changed. If something is not allowed for the current vehicle, gray it out instead of letting the player click it. Changes should sync properly so other players can see the stance too.

Please include language support for English, Japanese, and Korean, and make it easy to add more languages later. It needs to work with oxmysql and QBCore. Keep the setup simple for a server owner, with the resource manifest, client and server logic, and the web UI included. Look up current FiveM and QBCore docs online if you need to.