Carry immutable connection and profile ownership through Bot Mode actions,
session hydration, transcript loading, new chats, and profile deletion.
Keep same-named local and remote profiles isolated, preserve the full context
menu, and migrate Bot metadata to connection-qualified storage.
Add adversarial routing, alias, migration, cache, and compatibility coverage.
Replace the fixed 500-message REST hydration (getLatestSessionMessages)
with a 120-row newest-first tail page. When the page comes back full, a
new per-session tail store records "possibly truncated + next offset";
"Show earlier" — once the DOM budget and the in-memory store window are
both exhausted — fetches the next older page via the new
getOlderSessionMessages helper (order latest + offset, matching the
backend's back-from-newest paging semantics) and prepends it to the
session store, deduped by durable row id and race-guarded against
session switches. Legacy backends without pagination metadata fall back
to the one-shot full transcript and retire the action.
Tail-page refreshes (background sync, post-turn rehydrate, re-activate,
cold-resume prefetch) graft the refreshed tail onto any backfilled
prefix instead of clobbering it, preserving reference identity on
no-ops. includeCompacted stays on every read — compaction-archived rows
remain part of the durable display history.