Rework the sidebar "All accounts" section into a "Unified Mailbox" that, by
default, stays within the active login account and its shared/group folders.
Merging across multiple logged-in accounts becomes an opt-in sub-option instead
of the default, and the standalone per-account "All Mail" virtual folder is
folded into the unified All mail / Unread / Starred entries (its folder selection
now narrows those lists).
Scope:
- lib/unified-mailbox.ts: UnifiedAccountClient.crossIncludedMailboxIds; the cross
views honor the per-account folder selection (union across accounts = the sum
of each account's selection), falling back to inbox+custom when unset.
- stores/email-store.ts: buildUnifiedAccountClients gains scopeToClientAccountId
(the account boundary) and populates crossIncludedMailboxIds from
allMailFolderIds; remove the standalone __all_mail__ fetch/search/load-more
branches.
- page.tsx: scope to the active account unless cross-account is active (per-user
opt-in AND admin gate); the per-role unified mailboxes obey the same scope.
Folding:
- Drop ALL_MAIL_MAILBOX_ID (lib/jmap/types.ts); thread-list source-folder column
now keys on isUnifiedView only; settings folder picker moves under the unified
group and shows once any unified entry is enabled.
Config:
- User: new unifiedCrossAccount (default false); includeGroupInUnified default
flips to true; enableAllMailView retired; the three cross-view toggles now gate
the unified Unread/Starred/All mail entries.
- Admin: new unifiedCrossAccountEnabled gate, default FALSE (cross-account is an
admin opt-in; when off the per-user toggle is hidden and the scope is forced
account-bounded at runtime). allMailViewEnabled deprecated and normalized
forward into crossAllViewEnabled on policy load; cross-view gate labels reworded
to "Unified Mailbox: ...".
Header: the sidebar section shows "All accounts" when cross-account is active
(opt-in AND admin gate AND >1 connected account), else "Unified Mailbox".
Migration:
- Settings persist v5 -> v6 (exported migrateSettings) - cross-active users keep
cross-account; All-Mail-only users get the account-bounded unified All mail
entry with folder ids preserved; includeGroupInUnified enabled for every
migrated config; fresh installs are account-bounded.
- Admin policy: one-shot, marker-guarded migratePolicyUnifiedMailbox (run before
configManager.load) enables unifiedCrossAccountEnabled when a cross view was
active, so existing cross-account installs keep the behaviour despite the
default-false gate. Skipped on read-only config dirs.
Locales: sidebar all_accounts (original label) + unified_mailbox (translated, per
locale) keys; dead standalone all_mail strings removed across all 20 locales.
Docs: FEATURES.md updated to the account-bounded model, the cross-account gate,
and the folder-narrowed aggregate entries.
Verification: tsc clean, eslint clean, full vitest suite green (incl. translations
completeness, cross-view/migration coverage, and the admin policy migration test).
Replaces the global allMailFolderIds (string[] | null) with a per-account
Record<accountId, string[]>, so each account chooses which of its own folders
the "All Mail" view merges. A missing entry = "not configured" (defaults to
every no-role folder); an explicit [] = "no folders".
- settings-store: type/default -> Record (default {}); persist version 4 -> 5,
migration drops the legacy global list (the active account isn't known at
migrate time); onRehydrate + importSettings coerce/ignore any non-record
(legacy global string[] | null) shape. isPlainRecord() guard.
- email-store.resolveAllMailJmapIds: reads the entry for the account the view is
scoped to (viewingAccountId ?? activeAccountId); undefined -> all no-role,
[] -> none.
- layout-settings: read/write the active account's entry; when more than one
account is logged in, an italic hint names the account the selection applies
to (settings.appearance.all_mail.account_hint, 19 locales; de/ro translated).
- Test: stores/__tests__/settings-store-all-mail.test.ts (per-account
independence, explicit-empty vs not-configured, importSettings legacy guard).
Stefan Hildebrandt