- Remove all server-side path formatting logic
- Implement simple regex-based client-side formatting
- Support macOS, Linux, Windows, and root user paths
- Simpler implementation with no API changes needed
- Better separation of concerns (UI formatting in UI layer)
- Replace hardcoded home directory with dynamic detection using os.homedir()
- Add server-side path formatting using existing abbreviatePath utility
- Add displayWorkingDir field to Session interface
- Fix mobile header overflow with proper width constraints
- Update clickable-path component to accept pre-formatted display paths
This fixes both the regression where ~ substitution was broken and the
mobile header pushing content off-screen when session paths are long.
Fixes#96
