diff --git a/components/settings/AdvancedSettingsPageClient.tsx b/components/settings/AdvancedSettingsPageClient.tsx
index 8442f97..e034fdf 100644
--- a/components/settings/AdvancedSettingsPageClient.tsx
+++ b/components/settings/AdvancedSettingsPageClient.tsx
@@ -79,19 +79,16 @@ export function AdvancedSettingsPageClient({
   };
 
   const formatTimeAgo = (date: Date): string => {
-    const now = new Date();
-    const diffMs = now.getTime() - new Date(date).getTime();
-    const diffMins = Math.floor(diffMs / (1000 * 60));
-    const diffHours = Math.floor(diffMins / 60);
-    const diffDays = Math.floor(diffHours / 24);
-
-    if (diffMins < 60) {
-      return `il y a ${diffMins}min`;
-    } else if (diffHours < 24) {
-      return `il y a ${diffHours}h ${diffMins % 60}min`;
-    } else {
-      return `il y a ${diffDays}j`;
-    }
+    // Format fixe pour éviter les erreurs d'hydratation
+    const d = new Date(date);
+    return d.toLocaleDateString('fr-FR', {
+      day: '2-digit',
+      month: '2-digit',
+      year: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+      hour12: false
+    });
   };
 
   const getNextBackupTime = (): string => {
diff --git a/components/settings/BackupSettingsPageClient.tsx b/components/settings/BackupSettingsPageClient.tsx
index 7a7aac0..8b083eb 100644
--- a/components/settings/BackupSettingsPageClient.tsx
+++ b/components/settings/BackupSettingsPageClient.tsx
@@ -158,7 +158,17 @@ export default function BackupSettingsPageClient({ initialData }: BackupSettings
   };
 
   const formatDate = (date: string | Date): string => {
-    return new Date(date).toLocaleString();
+    // Format cohérent serveur/client pour éviter les erreurs d'hydratation
+    const d = new Date(date);
+    return d.toLocaleDateString('fr-FR', {
+      day: '2-digit',
+      month: '2-digit', 
+      year: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+      second: '2-digit',
+      hour12: false
+    });
   };
 
   if (isLoading) {
diff --git a/services/backup.ts b/services/backup.ts
index 795545f..c51b05e 100644
--- a/services/backup.ts
+++ b/services/backup.ts
@@ -27,14 +27,16 @@ export interface BackupInfo {
 }
 
 export class BackupService {
-  private defaultConfig: BackupConfig = {
-    enabled: true,
-    interval: 'hourly',
-    maxBackups: 5,
-    backupPath: this.getDefaultBackupPath(),
-    includeUploads: true,
-    compression: true,
-  };
+  private get defaultConfig(): BackupConfig {
+    return {
+      enabled: true,
+      interval: 'hourly',
+      maxBackups: 5,
+      backupPath: this.getDefaultBackupPath(),
+      includeUploads: true,
+      compression: true,
+    };
+  }
 
   private getDefaultBackupPath(): string {
     // 1. Variable d'environnement explicite
@@ -110,7 +112,7 @@ export class BackupService {
     const backupId = `backup_${Date.now()}`;
     const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
     const filename = `towercontrol_${timestamp}.db`;
-    const backupPath = path.join(this.config.backupPath, filename);
+    const backupPath = path.join(this.getCurrentBackupPath(), filename);
 
     console.log(`🔄 Starting ${type} backup: ${filename}`);
 
@@ -226,7 +228,7 @@ export class BackupService {
    * Restaure une sauvegarde
    */
   async restoreBackup(filename: string): Promise<void> {
-    const backupPath = path.join(this.config.backupPath, filename);
+    const backupPath = path.join(this.getCurrentBackupPath(), filename);
     
     // Résoudre le chemin de la base de données
     let dbPath: string;
@@ -304,19 +306,30 @@ export class BackupService {
     }
   }
 
+  /**
+   * Obtient le chemin de sauvegarde actuel (toujours à jour)
+   * Force la relecture des variables d'environnement à chaque appel
+   */
+  private getCurrentBackupPath(): string {
+    // Toujours recalculer depuis les variables d'environnement
+    // pour éviter les problèmes de cache lors des refresh
+    return this.getDefaultBackupPath();
+  }
+
   /**
    * Liste toutes les sauvegardes disponibles
    */
   async listBackups(): Promise<BackupInfo[]> {
     try {
+      const currentBackupPath = this.getCurrentBackupPath();
       await this.ensureBackupDirectory();
-      const files = await fs.readdir(this.config.backupPath);
+      const files = await fs.readdir(currentBackupPath);
       
       const backups: BackupInfo[] = [];
       
       for (const file of files) {
         if (file.startsWith('towercontrol_') && (file.endsWith('.db') || file.endsWith('.db.gz'))) {
-          const filePath = path.join(this.config.backupPath, file);
+          const filePath = path.join(currentBackupPath, file);
           const stats = await fs.stat(filePath);
           
           // Extraire la date du nom de fichier
@@ -353,7 +366,7 @@ export class BackupService {
    * Supprime une sauvegarde
    */
   async deleteBackup(filename: string): Promise<void> {
-    const backupPath = path.join(this.config.backupPath, filename);
+    const backupPath = path.join(this.getCurrentBackupPath(), filename);
     
     try {
       await fs.unlink(backupPath);
@@ -411,11 +424,12 @@ export class BackupService {
    * S'assure que le dossier de backup existe
    */
   private async ensureBackupDirectory(): Promise<void> {
+    const currentBackupPath = this.getCurrentBackupPath();
     try {
-      await fs.access(this.config.backupPath);
+      await fs.access(currentBackupPath);
     } catch {
-      await fs.mkdir(this.config.backupPath, { recursive: true });
-      console.log(`📁 Created backup directory: ${this.config.backupPath}`);
+      await fs.mkdir(currentBackupPath, { recursive: true });
+      console.log(`📁 Created backup directory: ${currentBackupPath}`);
     }
   }
 
@@ -447,7 +461,11 @@ export class BackupService {
    * Obtient la configuration actuelle
    */
   getConfig(): BackupConfig {
-    return { ...this.config };
+    // Retourner une config avec le chemin à jour
+    return {
+      ...this.config,
+      backupPath: this.getCurrentBackupPath()
+    };
   }
 }