A friend just told me to use Google translate on the word "Wifey" appearantly the Chinese language still likes Soulja boys

I was asked to make proof of concept small frontend app with some simplified requirements, they asked me because it should be written in the stack I done most of my career work with. I do it in 3 days instead of 5, using those 2 days to optimise the app and explore different approaches. I noted down my findings, what to avoid and reasons and also what is good to use and reasons and shared with everyone.

We waited for the project to start, I started working on another project in the meantime and there was a big rush to make project go live etc., so I was consumed 100% on that new project.

So they put in charge backend php developer to do frontend js work. I said ok, do you need help in starting out? Nah, my proof of concept repo is enough.

4 days before that small project goes live they asked me to do code review. All things I noted down to avoid are in the codebase, few bad practices but everything is over-engineered (in a very bad way), some parts should be more flexible as current setup is very rigid, having almost all kinds of CSS, I saw SASS, CSS variables, 2 different CSS-in-JS tools with some additional libraries that is used to toggle classes.

I don't know how to approach this as I am not asshole as a person and I don't want to say to my colleague that his codebase is completely trash, but it is.

The worst parts: They called me to help finish the app and budget is almost spent!

I would rewrite the whole app as the state of the current app is unusable and everything is glued with bad Chinese ducktape that barely holds.

Additional points because it won't bundle as everything is f**ked.

I am seriously thinking of duplicating master branch and refactor the whole fricking app but won't do that as I am burning midnight oil on other two projects. Don't worry overtimes are paid.

I hate those shitty situations, this project was supposed to be tiny, sweet and example of decent project in this company but it is instead big fat franken-app that will be example how smart it is to avoid putting backend dev to do frontend work (I also agree for vice versa)!