feat: enhance TransactionsPage with total count and amount display; update CategoryCard and ParentCategoryRow to link to transaction filters by category; implement localStorage for transaction period preference

app/transactions/page.tsx

@@ -243,6 +243,13 @@ export default function TransactionsPage() {
             <CardHeader className="flex flex-row items-center justify-between space-y-0 py-3 px-6">
               <CardTitle className="text-base font-semibold">
                 Statistiques
+                {!isStatsExpanded && (
+                  <span className="ml-3 text-sm font-normal text-muted-foreground">
+                    {displayTotalCount} opération
+                    {displayTotalCount > 1 ? "s" : ""} •{" "}
+                    {formatCurrency(totalAmount)}
+                  </span>
+                )}
               </CardTitle>
               <CollapsibleTrigger asChild>
                 <Button variant="ghost" size="sm" className="h-8">