Three failure paths that ended at an English HTTP status line or at no
recovery at all:
An empty or non-numeric withdrawal amount parsed to NaN, which JSON.stringify
sends as null, which pydantic rejects with a 422 — and FastAPI's validation
errors use a list of field objects rather than the {code, message} shape, so
apiErrorMessage fell through to res.statusText and the user read
"Unprocessable Content". The amount is now checked before the request, and the
list shape maps to a translated "invalid request" as a backstop for any other
field that fails validation.
A token the server no longer accepts left the dashboard looking logged in
while every poll failed, re-toasting "session expired" indefinitely. call()
now logs out on that specific code, dropping back to the login form.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>