Matt df1594d596 feat(email): Phase 5 — branding chain ext'd with per-port background
Surface hard-coded portnimara.com background image as a per-port
override:

- BrandingShell gains backgroundUrl; renderShell reads from
  branding.backgroundUrl with the existing Port Nimara overhead URL
  as the fallback default.
- getBrandingShell threads the value through from getPortBrandingConfig.
- PortBrandingConfig gains emailBackgroundUrl; SETTING_KEYS adds
  brandingEmailBackgroundUrl mapped to 'branding_email_background_url'.
- /admin/branding page exposes the new field as an image-upload below
  the logo with sizing guidance (1920x1080 JPG, pre-blurred).

This closes the last hard-coded portnimara.com asset URL in the email
shell — every transactional email now fully respects per-port branding
when the admin uploads their own assets. Logo override path was
already in place from R2-H15; the background was the missing piece.

Tests: 1374/1374 passing. tsc clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-18 15:12:28 +02:00
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