Update mutable fields on the current user. Only display_name today.
Field-presence semantics: we check model_fields_set so an explicit
null clears the value, while an omitted key leaves it alone. The
naive is not None check would have made it impossible to clear the
display name from the UI (a known fix from the 2026-05-12 audit).
Documentation Index
Fetch the complete documentation index at: https://docs.edge.glitchexecutor.com/llms.txt
Use this file to discover all available pages before exploring further.