Feat/unified mailbox account scope
Rework the sidebar "All accounts" into an account-bounded "Unified Mailbox"
by default, with cross-account merging as an opt-in (admin-gated) sub-option.
The standalone per-account "All Mail" virtual folder is folded into the unified
All mail / Unread / Starred entries.
Conflict resolution notes:
- stores/settings-store.ts: both main and this branch independently added a
per-account default-identity (#507) migration at different versions (main v6,
branch v7). Merged migration is version 7 using the refactored migrateSettings
function; the unified-mailbox rework is guarded at `version < 7` so users who
stopped at main's interim v6 identity bump still receive it, while the #507
identity-map coercion stays at `version < 6` so their populated map is kept.
- stores/auth-store.ts: kept main's applyPreferredIdentity (superset with the
pre-#507 legacy migration).
- stores/email-store.ts: removed the ALL_MAIL_MAILBOX_ID paths (folded into the
unified views) while preserving main's plugin hooks (onSearchResults /
onEmailsFetched); adopted advancedSearchCrossViewEmails for advanced cross-view
search.
- components/settings/layout-settings.tsx: kept main's faviconUnreadBadge setting
alongside the new unifiedCrossAccount toggle.
- integration/: union-merged the two independently-authored suites - branch suite
is authoritative (matches new behavior) with main's shared-identity (#569) group
infrastructure preserved.
- components/email/email-composer.tsx: dropped a duplicate data-testid attribute
introduced by the auto-merge.
Linus Rath
739b72d251