Motir

Estimate: 22m · Depends on: 3.8.1, 3.8.2, 3.2.5

Remove the per-column "Load more" button + scroll sentinel + .col-foot footer from BoardColumn (3.2.5) and the loadMore plumbing from BoardContainer; render the whole bounded set the 3.8.2 projection returns, virtualized via the 2.5.15 useRowWindow (kept — virtualization stays; only the user-facing paging affordance goes). The column count badge keeps showing totalCount. Drawn per design/boards/board-scale.mock.html (3.8.1).

Acceptance criteria

• No "Load more" button, footer, or scroll-sentinel auto-load remains on the flat board; BoardColumn renders the projection’s full (bounded) card list, virtualized; the count badge shows totalCount.
• The loadMore / paging / appendColumnPage plumbing tied to the retired cursor is removed from BoardContainer (no dead code, no calls to the removed route).
• Per-column virtualization (useRowWindow) still bounds the DOM on a tall column; colours via --el-*, shape via element tokens; matches the 3.8.1 mockup.
• Component tests assert no load-more affordance renders and a tall column stays DOM-bounded.

Context refs

• app/(authed)/boards/_components/BoardColumn.tsx + BoardContainer.tsx + boardPaging.ts (3.2.5) — the load-more + sentinel + footer to remove (do NOT touch the 3.2.4 drag handlers)
• components/ui/useRowWindow.ts (2.5.15) — the virtualization to keep
• design/boards/board-scale.mock.html + design-notes.md (3.8.1); lib/dto/boards.ts (3.8.2, the cursor-free column shape)