The admin/user profile modal PUT succeeded but the response was a bare
JSON body swapped into a small div at the bottom of the still-open
modal — no close, no toast, nothing moved. It read as 'the button did
nothing' even though the save landed. HX-Request calls now answer with
HX-Refresh (re-render shows the saved values everywhere and closes the
modal) plus a visible confirmation. API callers keep the JSON body.
Silent-failure display already exists site-wide (toast.ts listens for
htmx:responseError), so failures were never the silent case.