Switch /domains controller from `isAuthenticated` (cookie-only) to
`requireAuth` (cookie OR API key), matching the pattern used by other
project-scoped API endpoints (/v1/send, /contacts, etc.).
API keys are project-scoped credentials with full access; for write
operations the projectId in the request must equal the API key's
projectId. JWT (dashboard) auth retains role-based checks
(requireAdminAccess for POST/DELETE).
Also: improve UX when a domain is already linked to the same project
by returning a clear error instead of the generic "linked to another
project" message.
Refactor DomainService.checkDomainOwnership to make `userId` optional
(needed for API key path) while preserving its existing return shape
and adding `projectId` to the result.
The raw MIME template in sendRawEmail produced a blank line between Content-Type and List-Unsubscribe whenever no custom headers were passed, because the ternary for custom headers expanded to an empty string surrounded by newlines.
Per RFC 5322 §2.1 a blank line terminates the header section, so List-Unsubscribe ended up as the first line of the body. Lenient clients (Gmail, Outlook) recover; strict clients (Thunderbird) do not, breaking one-click unsubscribe and degrading Gmail/Yahoo bulk-sender deliverability signals.
Collect optional headers (custom + List-Unsubscribe) into an array, filter empties, and append them to the Content-Type line with a single newline separator. No codepath can now produce a blank line inside the header block.
Add a `mode: 'multi'` variant to CONDITION steps that allows matching a
field against multiple values, each routing to its own named branch.
Branches are evaluated in order; first match wins. A `default` branch
catches unmatched contacts.
- Schema: z.union for legacy binary + multi-branch condition configs
- Backend: executeCondition handles multi-branch evaluation with stable
branch IDs, falls back to default when no branch matches
- Builder: Dynamic branch rendering with per-branch colors/labels,
dagre layout spreads branches horizontally
- Config UI: Mode toggle (Simple If/Else vs Multi-branch Switch),
dynamic branch list with add/remove
- Tests: 8 new multi-branch tests covering matching, ordering, default
fallback, mixed operators, and transition routing
- Full backward compatibility: all changes gated on config.mode === 'multi'
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
ReylanLugo