- Change ShowBrowser from bool to *bool so nil means "don't override"
in mergeOptions(), fixing the bug where it always overwrote the base
- Add Bool() helper for convenient *bool construction
- Align NewInteractiveBrowser default from Chromium to Firefox to match
NewBrowser
- Update README example and CLI flags for the *bool change
Closes#15, #16
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>