Feat
- mail: index only tagged messages via MAIL_INDEX_TAG
- mail: add write tools — flags, tags, move, delete (#1148)
Fix
- mail: read back flags, and correct move/delete idempotency
- mail: skip the deletion pass when any mailbox listing failed
- mail: index the singleton view, not the threaded one
Refactor
- mail: share the default tag colour, tidy the CSRF docstring