fix: guard against undefined commandShortcuts when saving shortcuts

[arashsheyda]

Description

Saving a keyboard shortcut would throw Cannot set properties of undefined when commandShortcuts was missing from persisted settings (e.g. settings saved before this field existed).

Linked Issues

closes #263

Additional context

[pkg-pr-new]

Open in StackBlitz

@vitejs/devtools

npm i https://pkg.pr.new/@vitejs/devtools@264

@vitejs/devtools-kit

npm i https://pkg.pr.new/@vitejs/devtools-kit@264

@vitejs/devtools-rolldown

npm i https://pkg.pr.new/@vitejs/devtools-rolldown@264

@vitejs/devtools-rpc

npm i https://pkg.pr.new/@vitejs/devtools-rpc@264

@vitejs/devtools-self-inspect

npm i https://pkg.pr.new/@vitejs/devtools-self-inspect@264

commit: 5784360

[antfu]

But with mergeInitialValue it should have always be initilized - so if there is something wrong on that, it's better for us to fix that instead, otherwise the similar issue could occur again when we add new values in the the settings

[arashsheyda]

oh I didn't realize. I try to put a fresh reproduction, thanks

[arashsheyda]

@antfu I coudln't make a reproduction in stackblitz since catalog is not supported I think. but if you delete your node_modules and re-install and then run pnpm play and try to save a shortcut, you should see the error. I wasn't able to fix it otherwise I'm leaving this to you (feel free to close my PR or push to it :ty:)

Screen.Recording.2026-03-25.at.9.10.04.PM.mov