headscale 0.28 added GET /v1/preauthkey without a user param
which returns all keys including tag-only ones. this change
adds getAllPreAuthKeys() and uses it when available, falling
back to per-user fetching on older versions.
the UI now handles keys where user is null, showing them as
Tag Only in the filter dropdown.
closes#432
Amp-Thread-ID: https://ampcode.com/threads/T-019c9861-2d45-73ef-ab94-5fce62f63670
Co-authored-by: Amp <amp@ampcode.com>
In Headscale 0.28+, nodes can be registered with tag-only preauth keys
which have no associated user. This change updates the Machine type to
make user optional and adds null checks throughout the codebase where
node.user is accessed.
Fixes tag node operations (rename, add tags) that previously failed
with 'Unexpected Server Error' when accessing node.user.providerId
on nodes without a user association.
Refs: #432
Aarnav Tale