Resolves widget data persistence issue where switching hosts left stale data
from the previous host displayed in widgets.
Key improvements:
- Add Clone derives to all widget structs (CpuWidget, MemoryWidget,
ServicesWidget, BackupWidget)
- Create HostWidgets struct to cache widget states per hostname
- Update TuiApp with HashMap<String, HostWidgets> for per-host storage
- Fix borrowing issues by cloning hostname before mutable self borrow
- Implement instant widget state restoration when switching hosts
Tab key host switching now displays cached widget data for each host
without stale information persistence between switches.
Christoffer Martinsson
4b7d08153c