The previous implementation had inverted logic that prevented keyboard
shortcuts from working. The check `shortcut.ctrl ? event.ctrlKey : !event.ctrlKey`
meant that if ctrl wasn't specified, it required ctrl to NOT be pressed,
which broke shortcuts with only meta keys.
**Changes:**
- Fix modifier matching: only check modifiers that are explicitly required (=== true)
- Add check to prevent unwanted modifiers (e.g., if only meta+c, reject ctrl+meta+c)
- Improve cross-platform meta/cmd key handling (Mac uses metaKey, Windows/Linux uses ctrlKey)
- Allow meta key to permit ctrl on non-Mac platforms (meta is treated as ctrl equivalent)
**Now working shortcuts in playground:**
- Cmd/Ctrl+C: Copy color to clipboard
- Cmd/Ctrl+S: Share color (copy URL)
- Cmd/Ctrl+R: Generate random color
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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