client-error serializer: global-error.tsx/error.tsx + logClientError discard error.message/name/stack — appEvents clientError rows are opaque ({path,digest:null}), undiagnosable. Forward message/name/stack(trunc ~2KB) like venus VENUS-8 fix. Surfaced by applog: 1 crash @/mi-cursada + 3 @/login (anon, ~28s cluster, possibly stale-deploy Server-Action-not-found).