Rebasing feat/unified-mailbox onto main hit deep, divergent conflicts in the
mail-view/settings area (main added its own All-Mail + RTL refactor + a
username-keyed #507 identity impl). Post-rebase reconciliation:
- re-apply the cross-account blob routing to the message viewer (inline images,
drag-out, TNEF, embedded messages, thumbnails, bundle download) on main's
restructured file — every fetch goes through blobClient/blobAccountId derived
from the message's source account;
- drop the duplicate `preferredIdentityIds` declaration that both main
(username-keyed) and the branch (accountId-keyed) introduced — the branch's
account-scoped map is kept, matching the resolved modal/store logic.
tsc + eslint clean; unified-mailbox unit tests pass (settings-store all-mail /
preferred-identity, unified-mailbox-cross, jmap-client-resilience, migrate-policy).
Stefan Hildebrandt
d3addf54b4