v1.4.0

1.4.0

• Restructured UI: Installation card now contains Device Login, Repository Setup, Target Repository, and action buttons
• Sections auto-expand when not configured, stay collapsed when configured
• Renamed "Installation" to "Installation and Usage"
• Moved "Keep versions on GitHub" into Scheduled sync section
• Removed "Auto-sync pushes changes" toggle — scheduled sync always pushes when enabled
• Removed Troubleshooting options section
• Added Skipped (unchanged) count to sync activity display
• SHA conflict retries with backoff (up to 3 attempts)
• Version auto-read from config.yaml — single source of truth
• Reworded skeleton README