Management of the console's "actor": the Ash record on whose behalf actions
are executed (to exercise the policies). Stored in the HTTP session (a
LiveView cannot write the session via the socket: see
GreenAsh.ActorController) and re-threaded through all Ash calls.
Summary
Functions
Resolves the actor from the session (among domains), or nil.
Short label of the actor for the header (e.g. "Account:1b78…").
Resolves the actor stored in the session.
Functions
Resolves the actor from the session (among domains), or nil.
Discards the reason a stored actor failed to load; prefer resolve/2,
which reports it.
Short label of the actor for the header (e.g. "Account:1b78…").
Resolves the actor stored in the session.
Returns :none when no actor is set, {:ok, record} when it loads, and
{:error, message} when an actor is stored but cannot be loaded.
The distinction matters: falling back to no actor without a word makes the
console look like it ran as nobody on purpose. Every policy result then
reads as a verdict on the policy when it is really a verdict on an actor
that was never loaded. Callers are expected to surface message.