If selectedRuntime exists: "Datalayer: {runtimeName}"
If kernelName exists: "{kernelName}"
Otherwise: "Select Kernel"
Icon:
Loading spinner when kernelStatus is "busy"
Server environment icon otherwise
Position: Always on the RIGHT side of the toolbar
No dropdown arrow indicator (clean button appearance)
Clickable only when disconnected or to change runtime
Kernel selector button component.
Display logic:
Icon:
Position: Always on the RIGHT side of the toolbar No dropdown arrow indicator (clean button appearance) Clickable only when disconnected or to change runtime