Replace separate pinned rows datagrid with single datagrid using priority field - Add priority field to Lead interface (1 for priority, 0 for non-priority) - Set first 5 mock leads to priority=1 - Remove pinnedRows, pinnedRowIds, PinnedLead interface - Remove pinnedTopRowData from AgGridReact - Sort all leads by priority first (priority=1 at top) - Update row styling to use priority field instead of isPinned - Priority leads maintain red background styling