Improve sidebar consistency across different modules

Implement fixed width classes for the sidebar to ensure consistent sizing across all application modules, including the SAV module, and enhance localStorage handling for sidebar state persistence.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f9197b9b-a5b3-4469-a27d-930a9e9ee736
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/f9197b9b-a5b3-4469-a27d-930a9e9ee736/b03w3Om

client/src/components/Layout.tsx

@@ -52,8 +52,14 @@ export default function Layout({ children }: LayoutProps) {
 
   const [sidebarCollapsed, setSidebarCollapsed] = useState<boolean>(() => {
     // Restaurer l'état de la sidebar depuis localStorage, mais forcer collapsed sur mobile
-    const saved = localStorage.getItem('sidebarCollapsed');
-    return isMobile ? true : (saved ? JSON.parse(saved) : false);
+    try {
+      const saved = localStorage.getItem('sidebarCollapsed');
+      console.log('🔧 Layout - Restoring sidebar state:', { saved, isMobile });
+      return isMobile ? true : (saved ? JSON.parse(saved) : false);
+    } catch (error) {
+      console.error('Error reading sidebar state from localStorage:', error);
+      return isMobile ? true : false;
+    }
   });
 
   const [mobileMenuOpen, setMobileMenuOpen] = useState(false);