0fa53645b9
RBAC Phase 2 added row-level scoping that reads c.get("staff") on every
clients route. The test app had no middleware setting this context, causing
a TypeError (undefined.role) and 500 responses on all GET tests.
Add a manager-role mock staff middleware to the test Hono app so the
existing tests continue to cover the non-groomer code path.
Co-Authored-By: Paperclip <noreply@paperclip.ing>