## Summary
The Queue Metrics dashboard UI is gated by a per-org feature flag, so
there was no way to look at it for a real org without turning it on for
every member of that org. An admin impersonating into an org now sees
the metrics UI there regardless of the flag, so it can be checked
against real data before anyone else in the org sees it.
Nothing changes for a normal session: a member of an org whose flag is
off still gets the classic Queues page, and the gated sub-routes still
404.
## Design
The gate had no request and only resolved the org flag. It now takes the
request and resolves impersonation itself, rather than each caller
computing a boolean and passing it in, so the rule lives in one place
and a new call site cannot forget it. Seven call sites gate on this,
which is exactly why.
Two things narrow the bypass:
- It keys on **impersonation**, not `user.admin`. Impersonation is
scoped to one org and is deliberate; keying on admin status would
silently hand every admin the preview in their own day-to-day orgs.
- It yields to the **view-as-user** toggle. That toggle exists so an
impersonating admin can see what the member sees, and unreleased UI
leaking through it would make it lie. Suppressing a read-only view there
stays inside the display-only contract in `hasAdminDisplayAccess` (added
in #4421).
The bypass also stays behind the gate's existing org-membership lookup.
Since the acting user id is the impersonation target, that lookup is
what keeps the preview confined to the org actually being impersonated
into.
Verified end-to-end against a running instance across the matrix: member
with the flag off gets the classic view and 404s; the same org under
impersonation gets the metrics view and a 200; flipping view-as-user
returns it to the member's exact experience and back; and the flag-on
path is unchanged. An admin who is merely a member, not impersonating,
still gets the classic view.
One thing worth flagging: a few route comments say that with the flag
off no metrics reads fire. That remains true for every member session
and for the org as a whole, but an admin actively previewing does
exercise that org's real Redis and ClickHouse reads. That is inherent to
previewing, and bounded to one admin session.
Eric Allam
1034b618a4