+, _, ;, Mod++, and a few other combo keys are unsupported

TanStack Hotkeys version

v0.1.3

Framework/Library version

React v18.3.1

Describe the bug and the steps to reproduce it

// these work
useHotkey("=", () => {});
useHotkey("-", () => {});

// none of these work
useHotkey("+", () => {});
useHotkey("Mod++", () => {});
useHotkey("Mod+Shift+=", () => {});
useHotkey("_", () => {});
useHotkey("Mod+_", () => {});
useHotkey("Mod+Shift+-", () => {});

It should be possible to register these, although I assume Mod++ will prove tricky since + is used in the template literal types for chaining. But Mod+Shift+= does not work either.

We would like to use Mod+Shift+= and Mod+Shift+- in our code base.

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

https://codesandbox.io/p/github/AleksandrHovhannisyan/useHotkey-bug-report/main?file=%2Fsrc%2Findex.tsx&workspaceId=ws_EYV7eQpntkPhtWonNS8z6x

Screenshots or Videos (Optional)

Do you intend to try to help solve this bug with your own PR?

Maybe, I'll investigate and start debugging

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.

Start with the linked CodeSandbox and trace useHotkey through the RegisterableHotkey type and registration path. Check how literal combinations containing +, _, and shifted symbols are parsed and accepted. Done means the reported examples compile and register their corresponding shortcuts, including Mod+Shift+= and Mod+Shift+-.