Handles France Schengen visa refusals. Reads the refusal letter,
decodes the refusal code (A-Z categories), determines whether to
appeal (rare; ~60-day window) or reapply (common; better odds),
and structures the response addressing the specific refusal reason.
Drafts a supplementary cover letter for re-applications. Use when
the user says "my visa was refused", "appeal a refusal", or has
received a refusal letter from the consulate.
(Schengen-master skills)
