aisman

Direct session 61, Step 2: Pagination cursor to issueId, Load-more fixes, tooltips, scroll, flt-hidden audit:
- Change GetByProject pagination cursor from date to issueId
- Remove client-side re-sort of unresolved issues — keep server order
- Ensure 'Load more' button is visible in unresolved section when hasMore is true
- Show 'Load latest' button above resolved section when opened via individual issue
- Add tooltips to issue group section headers
- Add tooltips to Load more buttons showing batch size
- Scroll first newly loaded item into view after 'Load more' click
- Audit and fix .aim-flt-hidden — individually loaded issues must not start hidden.