feat: IMAP CONDSTORE fast-path, JMAP blob TTL, offline compose queue UI

- IMAP CONDSTORE (RFC 7162): skip sync when HIGHESTMODSEQ is unchanged;
  refresh only changed flags via CHANGEDSINCE on incremental sync
- JMAP blob expiry: re-fetch email bodies older than 7 days (schema v8→v9
  adds nullable cachedAt column to email_bodies)
- Offline compose queue: expose stuck pending_changes rows via
  observeFailedMutations / retryMutation / discardMutation; surface them
  in a FailedMutationBanner on the mailbox list screen
- Unit tests for all three features (236 passing)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

This commit is contained in:

Thomas Güttler

2026-04-20 06:32:33 +02:00

co-authored by

Claude Sonnet 4.6

parent 650c7a70f5

commit d5a5c7fbe3

11 changed files with 585 additions and 37 deletions

LATER.md

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 # Later
 Push to guettli@thomas-guettler via ssh+git
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 Sieve: JMAP, easy. Per IMAP...
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