Sub-ticket of MARS-354 log-error/log-toast/log-client-env: realUserId attribution under view-as (parity with MARS-352 log-ux-event). MARS-352 fixed /api/log-ux-event to credit session.realUserId (the real admin) not session.id (the impersonated target) under view-as, so UX-pain abandon-derivation isn't poisoned by events the target never triggered. The sibling client-log sinks log-error/log-toast/log-client-env share the same target-attribution-under-view-as property (the UX-pain miner groups by user) — apply the same realUserId fold-in + isViewAs-in-detail to those 3 routes for parity. Out of MARS-352 scope (security invariant + nav UX were the gate); forensic-attribution hygiene. Surfaced by coder during MARS-352 Class-A review. · mars