- Added a new `WorkspaceIndicator` component to display the active workspace and connection status.
- Integrated the `WorkspaceIndicator` into the `TabbedLayout` for improved workspace switching visibility.
- Removed the previous `ContextSwitcher` from `SidebarHeader` to streamline the UI.
- Updated `ServiceContext` and `ServiceContextRegistry` for better type handling and imports.
This commit enhances the user experience by providing a dedicated workspace indicator, facilitating easier context switching.
- Add ConnectionStatusBadge with 4 visual states (Monitor/Wifi/WifiOff/Spinner)
- Add ContextSwitcher dropdown listing Local + SSH contexts with status badges
- Add availableContexts state to contextSlice
- Add fetchAvailableContexts action called on system initialization
- ContextSwitcher follows SidebarHeader dropdown pattern (outside click, escape key)
- Switcher disabled during context switch to prevent race conditions
