feat: implement localStorage persistence for user preferences in categories, statistics, transactions, and sidebar components; enhance UI with collapsible elements and improved layout

components/dashboard/sidebar.tsx

@@ -1,6 +1,5 @@
 "use client";
 
-import { useState } from "react";
 import Link from "next/link";
 import { usePathname, useRouter } from "next/navigation";
 import { signOut } from "next-auth/react";
@@ -21,6 +20,7 @@ import {
 import { toast } from "sonner";
 import { Sheet, SheetContent } from "@/components/ui/sheet";
 import { useIsMobile } from "@/hooks/use-mobile";
+import { useLocalStorage } from "@/hooks/use-local-storage";
 
 const navItems = [
   { href: "/", label: "Tableau de bord", icon: LayoutDashboard },
@@ -158,7 +158,7 @@ interface SidebarProps {
 }
 
 export function Sidebar({ open, onOpenChange }: SidebarProps) {
-  const [collapsed, setCollapsed] = useState(false);
+  const [collapsed, setCollapsed] = useLocalStorage("sidebar-collapsed", false);
   const isMobile = useIsMobile();
 
   if (isMobile) {