Add a new "Debug" card at the bottom of the details page. It's maybe
premature to add a separate card for this, since all it currently lists
is whether the device is using TUN mode and (for Synology) the DSM
version. But I think it may be helpful to add client connectivity data
(like shown on admin console machine page) as well as a bug report
button. Those can come soon after the 1.56 launch.
Updates #10261
Signed-off-by: Will Norris <will@tailscale.com>