- Added session-domain modules and exports for session-entries, context, listing, loader, and migrations.
- Changed persistence to async append writes plus writeTextAtomic, removing sync line APIs.
- Added compaction-aware session context rebuild with dangling tool-call cleanup.
- Added resumable session resolution with status inference, id/stem/suffix matching, and backup recovery.
Capped the session tree selector gutter width so deeply branched histories preserve space for the selected entry text.
Added regression coverage for heavily branched trees at wide and narrow viewport widths.
Fixes#1144