Issue #124 paged only the unified "All inboxes" browse list. The
per-account folder view and every search path still loaded the whole
folder / entire unified inbox into memory and re-materialized it on each
cache write. Extend Paging 3 to them, mirroring the unified pager.
- MessageDao: add Room PagingSources for the per-account browse list
(`pagingFolderSummaries`, `inInbox = 1`) and for paged search
(`pagingUnifiedFolderSearchSummaries` / `pagingFolderSearchSummaries`).
The search queries LIKE-match the same columns the old in-memory
`matchesSearch` filter scanned (sender, sender address, subject,
snippet) and leave `inInbox` unfiltered so transient server-search hits
still surface. Read-only @Query methods — no schema change, no migration.
- MailRepository: add `pagedFolderMessages` and the two paged-search
flows via a shared `mailboxPager` whose PagingConfig adds
`maxSize = MAILBOX_PAGE_SIZE * 5` so a long scroll drops far-offscreen
pages. A `likePattern` helper escapes the LIKE metacharacters (\ % _)
so a query containing them still matches literally. The unified pager
(`pagedUnifiedFolderMessages`) is left untouched for its sibling PR.
- MailboxViewModel: collapse the old `messages` list flow and the
unified-only paged flow into one `pagedMessages` that dispatches each
(account, folder, query) to the matching pager; `cachedIn` is kept so
"select all" reads the loaded snapshot. Removes the now-dead
observe*FolderMessages / matchesSearch paths.
- MailboxScreen: render every mode from the single paged list. Gate the
empty state on `itemCount == 0 && refresh is NotLoading &&
append.endOfPaginationReached` so it no longer flashes on an
empty→loaded transition, preserving the search "no results", the
syncing-folder spinner (#149), and browse "no messages" states.
Behaviour is preserved: search filtering columns/scope, multi-select and
"select all", unread counts, and the browse-vs-search state machine
(server search + debounce + open/close) are unchanged — only the local
list materialization moved from Kotlin into paged SQL.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8
541f4809cb