feat(ui): add modern web UI with UI mode switching

[tsIsFried]

• Add pywebview-based web UI with glassmorphism design
• Implement UI mode switching between web and regular UI
• Add CLI argument --ui to select UI mode
• Add Switch to Web UI button in regular UI Misc tab
• Add callback registration methods to regular UI
• Add web_main.py entry point for web UI
• Add deck image capture script
• Add battle timeout and max restarts settings
• Update Makefile with web-dev target
• Settings persist across UI modes via cached ui_mode setting
• Remove notifications panel, recordings tab, and experimental features
• UI launches appropriate interface based on saved preference

[DamnUi]

I also agree that this would make maintaining harder than it already is... Their might be an need for a ui change but this application is one where going for a web based ui is a worse idea than just changing the applications ui itself.