Okokchat.zip Now
In qb-core/server/commands.lua , you can replace standard TriggerClientEvent('QBCore:Notify', ...) calls with a custom chat:addMessage event using the okokChat HTML template.
If you want system messages to appear in the okokChat style instead of standard notifications, you must modify your framework's core files. okokChat.zip
Download the resource and place the folder into your server's resources directory. In qb-core/server/commands