{{-- Minimal, deliberately tiny HTML email shell. MailWizz's transactional-emails API silently rejects any request whose body exceeds roughly 8KB — it comes back with a nonsense "every field is blank" validation error instead of a size error. Laravel's default markdown mail component renders to ~11KB on its own, which is already over that ceiling. Every transactional email in this app must stay well under it, so this shell is plain inline-styled HTML, no component system, no external assets. --}}