Your code can’t be both open source and closed source. In the other comment you wrote that he lifted your open source parts. Now you’re saying your code is not open source. People are allowed to copy open source code and you’re not even being consistent about whether your code is open source
OP’s looks a lot more inspired by k9s than what you produced.
Sorry but ideas (and now-a-days implementations) are cheap. Let the best tool win (or more practically, just use what suites you and don’t worry about it if others prefer another tool over yours. Especially don’t worry about it if someone uses an LLM to reproduce what you already did; that’s just the rising tide of LLM capabilities.)
And if the original app did indeed code it manually while the OP used LLMs, that gives the original a professional edge to adapt to bugs/issues and update with a better knowledge of the underlying code.