Anchor each defect's date label at the dot's bottom-right (splaying
diagonally down-right) and move the "+N more" marker to the section's
bottom-left so it no longer collides with the A2/A3/A4 size label.
Overlay each filed defect as a red dot inside its section box with a
diagonal date label; cap visible dots and collapse the remainder to a
"+N more" using the authoritative per-section counts (T6).
Add an `overlay` scoped slot to BoardView (C2) so the dashboard can layer
dots without forking the board definition (F1); the reporting view leaves
it empty. DotMap groups the bounded feed by section and the /defects page
wires both endpoints.
