feat: configurable stop shortcut with platform defaults

[shaw-baobao]

Summary

• add configurable stop shortcut in Settings
• default to Ctrl+C on macOS, Ctrl+Shift+C on Windows/Linux
• wire shortcut to interrupt active run

Testing

• npm run lint
• npm run test
• npm run typecheck

[chatgpt-codex-connector]

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Reviewed commit: 1ba451874b

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[shaw-baobao]

Fixed: useInterruptShortcut now skips events where event.defaultPrevented is true, and it no longer triggers inside input fields or other editable elements (avoiding conflicts with terminal shortcuts or copy shortcuts).
The fix has been pushed in commit f9b3c8e.

[Dimillian]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Can't wait for the next one!

ℹ️ About Codex in GitHub

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• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".