Return a JSON error body from UserAdminController instead of an empty 400, and extract API error messages in adminFetch so toasts display the reason. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Return a JSON error body from UserAdminController instead of an empty 400, and extract API error messages in adminFetch so toasts display the reason. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>