CRITICAL: Disable tutorial auto-open to fix mobile blocking
The tutorial popup was auto-opening on first visit and causing
issues on mobile that blocked all tap events, making the site
unusable. Temporarily disabled auto-open behavior.
- Tutorial still accessible via Footer "Tutorial" link
- Added better error handling for localStorage access
- Added error handling for SGF loading failures
- TODO: Re-enable auto-open with proper mobile testing
Fixes mobile usability issue.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>