Should a workspace's sidebar number follow the rendered order?

[luis-barroso]

Related to #2150, which reports the collapsed/expanded ordering mismatch. That issue is just the observation — this is the direction question behind it, which I was told not to put in the report.

herdr workspace list reports a number per workspace that stays the same regardless of how the sidebar is rendered. With a few repos open, the position a workspace appears at and the number it carries can drift apart.

Two directions I could imagine:

• number is positional and should track whatever order the sidebar renders. It already renumbers when a workspace is closed, so it behaves positionally today.
• number is a stable handle, and the sidebar isn't meant to be read as a numbered list at all.

I don't have a view on which is right for herdr. I'm asking because switch_workspace is documented as an optional indexed binding (prefix+shift+1..9), and which of the two it is decides whether that binding is safe to turn on once more than one repo is open.

herdr 0.7.5 stable, macOS, Ghostty.