chore(cleanup): remove unused imports, variables and fix missing hook dependencies

src/features/grid/components/financial-cell.tsx

@@ -6,11 +6,6 @@ interface FinancialCellProps {
     tauxMarge: number;
 }
 
-function getMarginColor(pct: number): string {
-    if (pct >= 45) return "#10b981"; // emerald-500
-    if (pct >= 20) return "#f59e0b"; // amber-500
-    return "#f43f5e";               // rose-500
-}
 
 export function FinancialCell({ totalCa, totalMarge, tauxMarge }: FinancialCellProps) {
     const isHighMargin = tauxMarge >= 45;

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

@@ -225,7 +225,7 @@ export function HeatmapGrid({ onSelectionChange }: HeatmapGridProps) {
             enableSorting: false,
             cell: ({ row }) => <AiInsightBlock row={row.original} />,
         },
-    ], [draftChanges, setDraftGamme]);
+    ], [draftChanges, setDraftGamme, MONTHS_12]);
 
     const table = useReactTable({
         data: rows,