diff --git a/app/categories/page.tsx b/app/categories/page.tsx
index 6e9d336..7127f0f 100644
--- a/app/categories/page.tsx
+++ b/app/categories/page.tsx
@@ -29,6 +29,7 @@ import {
 } from "@/lib/store-db";
 import type { Category, Transaction } from "@/lib/types";
 import { invalidateAllCategoryQueries } from "@/lib/cache-utils";
+import { useLocalStorage } from "@/hooks/use-local-storage";
 
 interface RecategorizationResult {
   transaction: Transaction;
@@ -58,6 +59,12 @@ export default function CategoriesPage() {
   const [isRecatDialogOpen, setIsRecatDialogOpen] = useState(false);
   const [isRecategorizing, setIsRecategorizing] = useState(false);
 
+  // Persister l'état "tout déplier" dans le localStorage
+  const [expandAllByDefault, setExpandAllByDefault] = useLocalStorage(
+    "categories-expand-all-by-default",
+    true
+  );
+
   // Organiser les catégories par parent
   const { parentCategories, childrenByParent, orphanCategories } =
     useMemo(() => {
@@ -97,13 +104,17 @@ export default function CategoriesPage() {
       };
     }, [metadata?.categories]);
 
-  // Initialiser tous les parents comme ouverts
+  // Initialiser tous les parents selon la préférence sauvegardée
   useEffect(() => {
     if (parentCategories.length > 0 && expandedParents.size === 0) {
-      setExpandedParents(new Set(parentCategories.map((p: Category) => p.id)));
+      if (expandAllByDefault) {
+        setExpandedParents(new Set(parentCategories.map((p: Category) => p.id)));
+      } else {
+        setExpandedParents(new Set());
+      }
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [parentCategories.length]);
+  }, [parentCategories.length, expandAllByDefault]);
 
   const refresh = useCallback(() => {
     invalidateAllCategoryQueries(queryClient);
@@ -162,10 +173,12 @@ export default function CategoriesPage() {
 
   const expandAll = () => {
     setExpandedParents(new Set(parentCategories.map((p: Category) => p.id)));
+    setExpandAllByDefault(true);
   };
 
   const collapseAll = () => {
     setExpandedParents(new Set());
+    setExpandAllByDefault(false);
   };
 
   const allExpanded =
diff --git a/app/statistics/page.tsx b/app/statistics/page.tsx
index 128026b..5df3931 100644
--- a/app/statistics/page.tsx
+++ b/app/statistics/page.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useMemo } from "react";
+import { useState, useMemo, useEffect } from "react";
 import { PageLayout, LoadingState, PageHeader } from "@/components/layout";
 import {
   StatsSummaryCards,
@@ -46,6 +46,7 @@ import { Button } from "@/components/ui/button";
 import { format } from "date-fns";
 import { fr } from "date-fns/locale";
 import { useIsMobile } from "@/hooks/use-mobile";
+import { useLocalStorage } from "@/hooks/use-local-storage";
 import type { Account, Category } from "@/lib/types";
 
 type Period = "1month" | "3months" | "6months" | "12months" | "custom" | "all";
@@ -54,21 +55,59 @@ export default function StatisticsPage() {
   const { data, isLoading } = useBankingData();
   const isMobile = useIsMobile();
   const [sheetOpen, setSheetOpen] = useState(false);
-  const [period, setPeriod] = useState<Period>("6months");
-  const [selectedAccounts, setSelectedAccounts] = useState<string[]>(["all"]);
-  const [selectedCategories, setSelectedCategories] = useState<string[]>([
-    "all",
-  ]);
+  
+  // Persister les filtres dans le localStorage
+  const [period, setPeriod] = useLocalStorage<Period>(
+    "statistics-period",
+    "6months"
+  );
+  const [selectedAccounts, setSelectedAccounts] = useLocalStorage<string[]>(
+    "statistics-selected-accounts",
+    ["all"]
+  );
+  const [selectedCategories, setSelectedCategories] = useLocalStorage<string[]>(
+    "statistics-selected-categories",
+    ["all"]
+  );
   const [excludeInternalTransfers, setExcludeInternalTransfers] =
-    useState(true);
-  const [customStartDate, setCustomStartDate] = useState<Date | undefined>(
-    undefined,
+    useLocalStorage("statistics-exclude-internal-transfers", true);
+  
+  // Pour les dates, on stocke les ISO strings et on les convertit
+  const [customStartDateISO, setCustomStartDateISO] = useLocalStorage<
+    string | null
+  >("statistics-custom-start-date", null);
+  const [customEndDateISO, setCustomEndDateISO] = useLocalStorage<
+    string | null
+  >("statistics-custom-end-date", null);
+  
+  // Convertir les ISO strings en Date
+  const customStartDate = useMemo(
+    () => (customStartDateISO ? new Date(customStartDateISO) : undefined),
+    [customStartDateISO]
   );
-  const [customEndDate, setCustomEndDate] = useState<Date | undefined>(
-    undefined,
+  const customEndDate = useMemo(
+    () => (customEndDateISO ? new Date(customEndDateISO) : undefined),
+    [customEndDateISO]
   );
+  
+  // Fonctions pour mettre à jour les dates avec persistance
+  const setCustomStartDate = (date: Date | undefined) => {
+    setCustomStartDateISO(date ? date.toISOString() : null);
+  };
+  const setCustomEndDate = (date: Date | undefined) => {
+    setCustomEndDateISO(date ? date.toISOString() : null);
+  };
+  
   const [isCustomDatePickerOpen, setIsCustomDatePickerOpen] = useState(false);
 
+  // Nettoyer les dates personnalisées quand on change de période (sauf si on passe à "custom")
+  useEffect(() => {
+    if (period !== "custom" && (customStartDateISO || customEndDateISO)) {
+      setCustomStartDateISO(null);
+      setCustomEndDateISO(null);
+    }
+  }, [period, customStartDateISO, customEndDateISO, setCustomStartDateISO, setCustomEndDateISO]);
+
   // Get start date based on period
   const startDate = useMemo(() => {
     const now = new Date();
diff --git a/app/transactions/page.tsx b/app/transactions/page.tsx
index b2ee4d9..cdc5eff 100644
--- a/app/transactions/page.tsx
+++ b/app/transactions/page.tsx
@@ -2,7 +2,7 @@
 
 import { useCallback, useMemo } from "react";
 import { PageLayout, PageHeader } from "@/components/layout";
-import { RefreshCw, Receipt, Euro, ChevronDown } from "lucide-react";
+import { RefreshCw, Receipt, Euro, ChevronDown, ChevronUp } from "lucide-react";
 import {
   TransactionFilters,
   TransactionBulkActions,
@@ -27,6 +27,7 @@ import { useTransactionsPage } from "@/hooks/use-transactions-page";
 import { useTransactionMutations } from "@/hooks/use-transaction-mutations";
 import { useTransactionRules } from "@/hooks/use-transaction-rules";
 import { useTransactionsChartData } from "@/hooks/use-transactions-chart-data";
+import { useLocalStorage } from "@/hooks/use-local-storage";
 
 export default function TransactionsPage() {
   const queryClient = useQueryClient();
@@ -150,6 +151,12 @@ export default function TransactionsPage() {
   const totalAmount = chartTotalAmount ?? 0;
   const displayTotalCount = chartTotalCount ?? totalTransactions;
 
+  // Persist statistics collapsed state in localStorage
+  const [isStatsExpanded, setIsStatsExpanded] = useLocalStorage(
+    "transactions-stats-expanded",
+    true
+  );
+
   // For filter comboboxes, we'll use empty arrays for now
   // They can be enhanced later with separate queries if needed
   const transactionsForAccountFilter: never[] = [];
@@ -213,15 +220,24 @@ export default function TransactionsPage() {
 
       {(!isLoadingChart || !isLoadingTransactions) && (
         <Card className="mb-6">
-          <Collapsible defaultOpen={true}>
+          <Collapsible open={isStatsExpanded} onOpenChange={setIsStatsExpanded}>
             <CardHeader className="flex flex-row items-center justify-between space-y-0 py-3 px-6">
               <CardTitle className="text-base font-semibold">
                 Statistiques
               </CardTitle>
               <CollapsibleTrigger asChild>
                 <Button variant="ghost" size="sm" className="h-8">
-                  <ChevronDown className="w-4 h-4 mr-1" />
-                  Réduire
+                  {isStatsExpanded ? (
+                    <>
+                      <ChevronUp className="w-4 h-4 mr-1" />
+                      Réduire
+                    </>
+                  ) : (
+                    <>
+                      <ChevronDown className="w-4 h-4 mr-1" />
+                      Afficher
+                    </>
+                  )}
                 </Button>
               </CollapsibleTrigger>
             </CardHeader>
diff --git a/components/dashboard/sidebar.tsx b/components/dashboard/sidebar.tsx
index 2be50ef..0f125ad 100644
--- a/components/dashboard/sidebar.tsx
+++ b/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) {
diff --git a/components/transactions/transaction-table.tsx b/components/transactions/transaction-table.tsx
index 02fc445..5c09eb1 100644
--- a/components/transactions/transaction-table.tsx
+++ b/components/transactions/transaction-table.tsx
@@ -446,7 +446,7 @@ export function TransactionTable({
                 <div className="p-3 text-sm font-medium text-muted-foreground">
                   Compte
                 </div>
-                <div className="p-3 text-sm font-medium text-muted-foreground">
+                <div className="p-3 text-sm font-medium text-muted-foreground text-center">
                   Catégorie
                 </div>
                 <div className="p-3 text-right">
@@ -552,7 +552,7 @@ export function TransactionTable({
                         {account?.name || "-"}
                       </div>
                       <div
-                        className="p-3 relative"
+                        className="p-3 relative flex items-center justify-center"
                         onClick={(e) => e.stopPropagation()}
                       >
                         {updatingTransactionIds.has(transaction.id) && (
diff --git a/hooks/use-local-storage.ts b/hooks/use-local-storage.ts
new file mode 100644
index 0000000..e442dfe
--- /dev/null
+++ b/hooks/use-local-storage.ts
@@ -0,0 +1,45 @@
+"use client";
+
+import { useState } from "react";
+
+/**
+ * Hook pour gérer la persistance d'une valeur dans le localStorage
+ */
+export function useLocalStorage<T>(
+  key: string,
+  initialValue: T
+): [T, (value: T | ((val: T) => T)) => void] {
+  // État pour stocker la valeur
+  const [storedValue, setStoredValue] = useState<T>(() => {
+    if (typeof window === "undefined") {
+      return initialValue;
+    }
+    try {
+      const item = window.localStorage.getItem(key);
+      return item ? JSON.parse(item) : initialValue;
+    } catch (error) {
+      console.error(`Error reading localStorage key "${key}":`, error);
+      return initialValue;
+    }
+  });
+
+  // Fonction pour mettre à jour la valeur
+  const setValue = (value: T | ((val: T) => T)) => {
+    try {
+      // Permet d'utiliser une fonction comme setState
+      const valueToStore =
+        value instanceof Function ? value(storedValue) : value;
+      
+      setStoredValue(valueToStore);
+      
+      if (typeof window !== "undefined") {
+        window.localStorage.setItem(key, JSON.stringify(valueToStore));
+      }
+    } catch (error) {
+      console.error(`Error setting localStorage key "${key}":`, error);
+    }
+  };
+
+  return [storedValue, setValue];
+}
+