Frontend for the incoming-mail feature.
- Settings -> Email: an "Incoming mail (IMAP)" block under the outgoing SMTP
settings (same field shape: host/port/security/user/pass/folder), shown only
when the incomingMail flag is on (IncomingMailConfigCard, self-contained
load/save).
- A "Received emails" tab next to "Sent emails" (ReceivedEmailsPanel) listing
the received_emails log with from/subject/received/status + attachment count
and a link to the incoming-invoices inbox.
- `incomingMail` flag in the frontend (type + context default, standalone) +
a Communication-section Features card.
- email.service: getIncomingConfig / updateIncomingConfig / listReceived.
- i18n: settings.features.incomingMail, email.incoming, email.received (EN+DE).
Verified: tsc --noEmit clean (0 errors); en/de JSON valid; npm run build green.
Luca
31280e1f7a