The user-actions handler already supported `rename_user` and
`delete_user` (both keyed by headscale_user_id), but the Unlinked
Headscale Users table had no menu to invoke them. That left admins
with no UI path to remove or rename Headscale users that have no
Headplane counterpart — e.g. users created via the Headscale CLI
before an OIDC migration.
Wire the existing dialogs into a new HeadscaleUserMenu rendered in
the row's actions column. OIDC-managed users still can't be renamed
(Headscale rejects it), so the Rename item hides for those.
Closes#525
Amp-Thread-ID: https://ampcode.com/threads/T-019e7ae4-6862-760c-a3e7-239350eab71d
Co-authored-by: Amp <amp@ampcode.com>
Aarnav Tale