/api/favicon returned 404 in three paths (negative cache hit, non-200
upstream, sub-10-byte body), and since the avatar loads it as <img src>,
the browser logged a red 404 for every sender domain without a public
favicon - dozens per inbox view. Now it returns HTTP 200 with a 1x1
transparent PNG and an X-Bulwark-Favicon: missing header. Avatar.tsx detects
the sentinel via naturalWidth <= 1 in onLoad and falls back to initials, so
behaviour is visually identical without the console noise.
- Added support for parsing and generating additional vCard properties including GENDER, LOGO, SOUND, LABEL, CALURI, CALADRURI, FBURL, and SOURCE.
- Extended ContactCard interface to include new fields such as gender, media, anniversaries, online services, and personal info.
- Implemented logic to handle multi-part TLDs for domain extraction in avatars.
- Improved avatar component to prioritize contact photos and handle inline images in emails.
- Updated localization files to include new fields and labels for contact details.
- Refactored contact store to expose a method for retrieving contact photos.
- Enhanced unit tests to cover new vCard properties and ensure correct parsing and generation.
