ultimo.email is the webmail itself, so any path that was not a real file fell
back to the app's index.html: /bimi/ultimo-logo.svg (the BIMI record's logo)
and /favicon.ico both came back as the webmail page. They now ship in
frontend/public, which nginx serves before the SPA fallback. The BIMI SVG
moves there from frontend/icons, so there is one copy.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
lukasandClaude Opus 5.5
d1f6d183e0
