* Added account selection for protocol links when multiple connected accounts are available, including mailto: links
* Added support for handling mailto: links in an already-open PWA/session instead of always opening a new tab
* Added webcal: protocol handling for calendar links
* Added account selection for webcal: links when multiple calendar-capable accounts are connected
* Added an import-or-subscribe choice for detected webcal calendars
* Added protocol handler settings for registering mail and calendar handlers and choosing the open mode
* Added service worker/session coordination for passing protocol requests between browser/PWA contexts
* Added tests and translations for the new protocol handler flows
Adds an Override toggle in the composer's From row. When enabled, name
and address become free-text inputs. Mail is still submitted through the
selected identity, but the outgoing message's From: header — and the
SMTP envelope MAIL FROM when different — is set from the override.
The existing "Auto-select Reply Address" setting is extended: if the
incoming message was addressed to an alias on a domain that matches one
of your identities but isn't itself an identity (classic domain catch-
all), it now auto-enables Override and pre-fills the alias. Quick reply
honors the same resolution. The setting is relabeled to reflect the
broader behavior.
JMAP: client.sendEmail gains an optional envelopeMailFrom; when set, the
EmailSubmission includes an explicit envelope with that mailFrom and the
to/cc/bcc as rcptTo so header-From and envelope can diverge (JMAP §7.3).
S/MIME: override is incompatible with sign/encrypt and is refused with a
clear error — signing a different visible From from the identity's
certificate Subject would produce messages clients reject.
Tests: resolveReplyFrom covers exact match, sub-address stripping,
catch-all detection, identity preference, and foreign-domain null.
The multi-account refresh-token cookie slot wiring was half-implemented:
every account's refresh token ended up on slot 0, so "+ Add Account"
silently clobbered the previous account's `jmap_rt` cookie. On page
refresh, only the most-recently-added account had a working refresh
token; the others bounced to login.
Three coordinated changes:
1. `app/[locale]/login/page.tsx` (handleOAuthLogin): write the next-free
cookie slot to `sessionStorage['oauth_cookie_slot']` before redirecting
to the IdP. `loginWithOAuth` already reads this key but it was never
written, so it always defaulted to 0.
2. `stores/auth-store.ts` (loginWithOAuth): distinguish "no value set"
(`rawSlot === null`) from "value is 0". Previously
`parseInt(getItem(...) || '0')` collapsed both cases, making the
`getNextCookieSlot()` fallback unreachable.
3. `stores/auth-store.ts` (loginWithServerSso) +
`app/api/auth/sso/complete/route.ts`: pass the slot through the body of
the POST and use it for `refreshTokenCookieName(slot)`. Same pattern as
the existing `/api/auth/token POST` that already accepts a slot. The
server defaults to 0 for back-compat with any caller that omits it.
After the fix, signing in with multiple accounts produces distinct
`jmap_rt`, `jmap_rt_1`, `jmap_rt_2`, ... cookies (matching the cookieSlot
field in account-store) and all accounts survive a page refresh.
Repro before the fix:
- Sign in with one account, refresh — works.
- Click "+ Add Account", sign in with a second account, refresh — second
account vanishes from the dropdown; switching to the first account in
the dropdown still shows the second account's identity in the From box.
Lucas Gaitzsch