Add Fix() method to SessionHookCheck to automatically update
settings.json files when 'gt prime' is used without '--hook'.
This enables 'gt doctor --fix' to repair existing installations
that use bare 'gt prime' in SessionStart/PreCompact hooks.
Changes:
- Changed SessionHookCheck to embed FixableCheck instead of BaseCheck
- Added filesToFix cache populated during Run()
- Implemented Fix() method that parses JSON and replaces 'gt prime'
with 'gt prime --hook' in command strings
- Uses json.Encoder with SetEscapeHTML(false) to preserve readable
ampersands in command strings
Closes: gt-1tj0c
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
5791cd7e34