One flow, one back-stack entry, as a stepper rather than four destinations —
the steps are not independently reachable, and "back" from the browser step
abandons a server-side flow rather than popping a screen. It hangs off Settings
with the same sliding-section pattern Storage -> Export uses.
address -> discovery -> (Nextcloud browser approval | username + password)
-> pick lists -> add account
Provider warnings come before the attempt, not after: type a Fastmail or iCloud
address and the app password rule is stated while you type, which is the single
most common support ticket a CalDAV client inherits. Google is refused with the
reason. A login-flow host mismatch is shown, not refused — reverse proxies are
ordinary on self-hosted installs.
PreemptiveBasicInterceptor is deleted. The vendored BasicDigestAuthHandler
already sends Basic preemptively over HTTPS, also does Digest (Baikal defaults
to it, OkHttp has none), caches the working scheme, and scopes by registrable
domain — which is what iCloud's cross-host home set needs. Two implementations
of one job is the defect chunk 1 removed from ICalendarWriter.
⚠️ That handler compares its `domain` against the *registrable* domain, so
passing the full host meant credentials were withheld from every request to
every subdomain — i.e. every self-hosted Nextcloud, silently 401ing forever.
Pinned by CalDavHttpTest.
CalDavGateway and AccountCreator put the network and the database behind
interfaces so the sign-in state machine is testable without a server, a
database, a Keystore or an AccountManager. It had no tests, and the review
found eight issues in it.
Account creation is transactional and rolls its lists back explicitly:
account_id is ON DELETE SET NULL, so deleting the row alone leaves orphan
lists behind and every retry adds another set.