feat: implement virtualized heatmap grid component using TanStack Table and a new Zustand store for product data.

src/features/grid/components/heatmap-grid.tsx

@@ -120,12 +120,14 @@ interface VirtualRowProps {
     rowHeight: number;
     isSelected: boolean;
     columnVisibility: Record<string, boolean>;
+    columnSizing: Record<string, number>;
 }
 
-const GridRow = React.memo(({ virtualRow, row, rowHeight, isSelected, columnVisibility }: VirtualRowProps) => {
+const GridRow = React.memo(({ virtualRow, row, rowHeight, isSelected, columnVisibility, columnSizing }: VirtualRowProps) => {
     // Uniquement la ligne concernée écoute son propre changement pour l'effet visuel
     const effectiveGamme = useGridStore((s) => s.draftChanges[row.original.codein] ?? row.original.codeGamme);
     void columnVisibility; // Force re-render via React.memo when visibility changes
+    void columnSizing; // Force re-render via React.memo when resizing columns
 
     return (
         <tr
@@ -179,7 +181,7 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
     const { rows, filters, displayDensity } = useGridStore();
     const [sorting, setSorting] = useState<SortingState>([]);
     const [rowSelection, setRowSelection] = useState<RowSelectionState>({});
-    const { columnVisibility, setColumnVisibility } = useGridStore();
+    const { columnVisibility, setColumnVisibility, columnSizing, setColumnSizing } = useGridStore();
     const [isMounted, setIsMounted] = useState(false);
     const [portalContainer, setPortalContainer] = useState<HTMLElement | null>(null);
     const tableContainerRef = useRef<HTMLDivElement>(null);
@@ -452,10 +454,12 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
     const table = useReactTable({
         data: rows,
         columns,
-        state: { sorting, globalFilter: filters.search, rowSelection, columnVisibility },
+        state: { sorting, globalFilter: filters.search, rowSelection, columnVisibility, columnSizing },
         onSortingChange: setSorting,
         onRowSelectionChange: handleRowSelectionChange,
         onColumnVisibilityChange: setColumnVisibility,
+        onColumnSizingChange: setColumnSizing,
+        columnResizeMode: "onChange",
         getCoreRowModel: getCoreRowModel(),
         getSortedRowModel: getSortedRowModel(),
         getFilteredRowModel: getFilteredRowModel(),
@@ -560,7 +564,7 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
                                     return (
                                         <th
                                             key={header.id}
-                                            className="px-2 py-3 text-[10px] font-black uppercase tracking-[0.05em] whitespace-nowrap select-none flex items-center transition-colors hover:bg-white/5"
+                                            className="px-2 py-3 text-[10px] font-black uppercase tracking-[0.05em] whitespace-nowrap select-none flex items-center transition-colors hover:bg-white/5 relative group/header"
                                             style={{
                                                 width: isFlexible ? "100%" : size,
                                                 flex: isFlexible ? `1 1 ${size}px` : `0 0 ${size}px`,
@@ -582,6 +586,15 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
                                                     </div>
                                                 )}
                                             </div>
+                                            {/* Handle de redimensionnement de la colonne */}
+                                            {header.column.getCanResize() && (
+                                                <div
+                                                    onMouseDown={header.getResizeHandler()}
+                                                    onTouchStart={header.getResizeHandler()}
+                                                    onClick={(e) => e.stopPropagation()}
+                                                    className={`absolute right-0 top-0 h-full w-1.5 cursor-col-resize user-select-none touch-none hover:bg-emerald-500/50 ${header.column.getIsResizing() ? "bg-emerald-500" : ""}`}
+                                                />
+                                            )}
                                         </th>
                                     );
                                 })}
@@ -601,6 +614,7 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
                                         rowHeight={rowHeight}
                                         isSelected={isSelected}
                                         columnVisibility={columnVisibility}
+                                        columnSizing={columnSizing}
                                     />
                                 </div>
                             );

src/features/grid/store/use-grid-store.ts

@@ -16,6 +16,8 @@ interface GridState {
     activeGridQuery: string;
     /** Persisted column visibility state */
     columnVisibility: Record<string, boolean>;
+    /** Persisted column sizing state */
+    columnSizing: Record<string, number>;
 
     // Actions
     setRows: (rows: ProductRow[]) => void;
@@ -29,6 +31,7 @@ interface GridState {
     restoreSnapshot: (changes: Record<string, GammeCode>) => void;
     batchSetDraftGamme: (changes: Record<string, GammeCode>) => void;
     setColumnVisibility: (updater: Record<string, boolean> | ((old: Record<string, boolean>) => Record<string, boolean>)) => void;
+    setColumnSizing: (updater: Record<string, number> | ((old: Record<string, number>) => Record<string, number>)) => void;
 }
 
 function computeSummary(rows: ProductRow[], drafts: Record<string, GammeCode>): GridSummary {
@@ -71,6 +74,7 @@ export const useGridStore = create<GridState>()(
             displayDensity: "normal",
             activeGridQuery: "",
             columnVisibility: {},
+            columnSizing: {},
 
             setRows: (rows) => {
                 set({ rows, summary: computeSummary(rows, get().draftChanges) });
@@ -134,16 +138,22 @@ export const useGridStore = create<GridState>()(
                     columnVisibility: typeof updater === 'function' ? updater(state.columnVisibility) : updater
                 }));
             },
+            setColumnSizing: (updater) => {
+                set((state) => ({
+                    columnSizing: typeof updater === 'function' ? updater(state.columnSizing) : updater
+                }));
+            },
         }),
         {
             name: "collectflow-grid-storage",
-            // Only persist filters, display density, drafts, active grid query, and column visibility
+            // Only persist filters, display density, drafts, active grid query, and column visibility/sizing
             partialize: (state) => ({
                 filters: state.filters,
                 displayDensity: state.displayDensity,
                 draftChanges: state.draftChanges,
                 activeGridQuery: state.activeGridQuery,
                 columnVisibility: state.columnVisibility,
+                columnSizing: state.columnSizing,
             }),
         }
     )