Replace drawer-based info display with inline columns that can be toggled:
- Add IP, Uptime, Node, Backup, OS, Tags columns (user-toggleable)
- Add ColumnPicker dropdown to show/hide columns with localStorage persistence
- Columns auto-show based on screen width using priority system
- Remove GuestDrawer - all info now visible inline or via tooltips
Rich hover tooltips:
- Disk bar: Shows all mount points with usage %, color-coded by severity
- Memory bar: Shows used/free/balloon/swap breakdown
- IP column: Shows network icon + count, hover for interfaces, MACs, IPs, traffic
Also:
- Create useColumnVisibility hook for responsive column management
- Create ColumnPicker component for column toggle UI
- Update drawer layouts in Hosts/Docker tabs for consistency
