aisman

Session 75, Step 6: Fix MRU sessions, bulk issue refs, chevron/animations, load more button
- AIM-1134 Optimize MRU - update list item on click instead of full re-render
- AIM-1165 Auto-add issue reference as LinkType 7 when saving markdown
- AIM-1173 Fix chevron icons direction and add slideUp/slideDown for collapsible list sections
- AIM-1181 Remove individual issues that match incoming batch-loaded issues