Backend: ProductSummaryResponse gains cells: [{team, project_id, project_name}] and progress: {done, active, blocked}. ProductService.progress_for_products does one grouped query over tasks for every distinct project_id any product references, summed per product (monorepo case dedups a project once per product via a seen set). list_all eager-loads cells + each cell's project (selectinload + joinedload) so product_to_summary reads project.name without an N+1. No migration — reads existing tasks.status + product_projects.
Frontend: ProductTable renders a Cells column (team badges + project names, Unmapped when empty) and a Progress column (done/active/blocked counts + a health dot: amber at-risk when blocked>0). Both desktop Table and mobile ResponsiveTableCard variants. Mock products carry the new shape.
Co-authored-by: Renn F <rennf93@users.noreply.github.com>
