Fixes#119 - Installation on WSL2 via npx would report success but
files weren't actually copied due to stdin handling issues.
Changes:
- Detect non-TTY stdin and fall back to global install automatically
- Handle premature readline close events
- Verify each component exists after copying before showing success
- Exit with error if any critical component fails to install
- Show workaround command when installation fails
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
c233f71163