The useInfiniteQuery with tRPC as-any cast wasn't passing cursors
correctly, causing no data to load on initial page visit.
Replaced with simple useQuery + manual cursor state:
- First 50 entries load immediately on mount
- "Load more" button appends next page via cursor
- Filter changes reset cursor and entries
- keepPreviousData prevents flash during pagination
Co-Authored-By: claude-flow <ruv@ruv.net>
- List query: exclude changes JSONB from select (only metadata)
- Default to last 30 days when no date filter (avoids full table scan)
- New getById query: fetches full changes JSONB on demand
- ExpandedDiff component: fetches diff only when user expands an entry
- 5-minute staleTime on expanded diffs (cacheable, rarely changes)
Co-Authored-By: claude-flow <ruv@ruv.net>