diff --git a/.replit b/.replit
index 2014f31..9cb2881 100644
--- a/.replit
+++ b/.replit
@@ -16,8 +16,8 @@ localPort = 5000
 externalPort = 80
 
 [[ports]]
-localPort = 45995
-externalPort = 3000
+localPort = 41343
+externalPort = 3001
 
 [workflows]
 runButton = "Project"
diff --git a/client/src/components/Layout.tsx b/client/src/components/Layout.tsx
index ae6d6c4..4e35167 100644
--- a/client/src/components/Layout.tsx
+++ b/client/src/components/Layout.tsx
@@ -1,13 +1,16 @@
 import { ReactNode, useState, useEffect } from "react";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
+import { useLocation } from "wouter";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Button } from "@/components/ui/button";
-import { LogOut, Store, Menu, AlertTriangle } from "lucide-react";
+import { LogOut, Store, Menu, AlertTriangle, Smartphone, Monitor } from "lucide-react";
 import { useAuthUnified } from "@/hooks/useAuthUnified";
 import { useIsMobile } from "@/hooks/use-mobile";
 import { useScreenSize } from "@/hooks/use-screen-size";
+import { usePhoneMode } from "@/hooks/use-phone-mode";
 import { StoreProvider } from "@/contexts/StoreContext";
 import Sidebar from "./Sidebar";
+import PhoneBottomNav from "./PhoneBottomNav";
 import WeatherWidget from "./WeatherWidget";
 import DateWidget from "./DateWidget";
 import type { Group } from "@shared/schema";
@@ -19,9 +22,11 @@ interface LayoutProps {
 
 export default function Layout({ children }: LayoutProps) {
   const { user } = useAuthUnified();
+  const [location] = useLocation();
   const queryClient = useQueryClient();
   const isMobile = useIsMobile();
   const { screenSize, isMobileOrTablet, isTablet } = useScreenSize();
+  const { isPhoneMode, setPhoneMode, canUsePhoneMode } = usePhoneMode();
   
   const [selectedStoreId, setSelectedStoreId] = useState<number | null>(() => {
     // Restaurer le selectedStoreId depuis localStorage si disponible
@@ -120,28 +125,35 @@ export default function Layout({ children }: LayoutProps) {
 
   return (
     <StoreProvider value={{ selectedStoreId, setSelectedStoreId, stores, sidebarCollapsed, setSidebarCollapsed, mobileMenuOpen, setMobileMenuOpen, storeInitialized }}>
-      <div className="layout-container flex bg-gray-50">
-        {/* Mobile overlay */}
-        {isMobile && mobileMenuOpen && (
+      <div className={`layout-container flex bg-gray-50 ${isPhoneMode ? 'phone-mode' : ''}`}>
+        {/* Mobile overlay for normal mode */}
+        {!isPhoneMode && isMobile && mobileMenuOpen && (
           <div 
             className="fixed inset-0 bg-black bg-opacity-50 z-40"
             onClick={() => setMobileMenuOpen(false)}
           />
         )}
         
-        <Sidebar />
+        {/* Sidebar for normal mode */}
+        {!isPhoneMode && <Sidebar />}
         
         <main className={`flex-1 flex flex-col h-full ${
-          // Marge gauche uniquement si la sidebar est en position fixed (tablet expanded)
-          isMobile ? 'ml-0' : (isTablet && !sidebarCollapsed) ? 'ml-48' : 'ml-0'
+          // Ajustement des marges selon le mode
+          isPhoneMode 
+            ? 'ml-0 mb-20' // Mode téléphone : pas de marge gauche, marge bas pour bottom nav
+            : isMobile 
+              ? 'ml-0' 
+              : (isTablet && !sidebarCollapsed) ? 'ml-48' : 'ml-0'
         }`}>
           {/* Header with mobile menu and store selector */}
-          <header className={`h-16 bg-white border-b border-gray-200 flex items-center justify-between ${
+          <header className={`${
+            isPhoneMode ? 'h-12' : 'h-16'
+          } bg-white border-b border-gray-200 flex items-center justify-between ${
             isMobileOrTablet ? 'px-3' : 'px-6'
           }`}>
             <div className="flex items-center gap-2 sm:gap-4 min-w-0 flex-1">
-              {/* Mobile menu button */}
-              {isMobile && (
+              {/* Mobile menu button (only in normal mode) */}
+              {!isPhoneMode && isMobile && (
                 <Button
                   variant="ghost"
                   size="sm"
@@ -157,13 +169,47 @@ export default function Layout({ children }: LayoutProps) {
               <div className={`flex items-center ${
                 isMobile ? 'gap-1' : 'gap-3'
               } min-w-0`}>
-                <WeatherWidget />
-                {!isMobile && <DateWidget />}
+                {/* En mode téléphone, affichage simplifié */}
+                {isPhoneMode ? (
+                  <div className="flex items-center gap-2">
+                    <WeatherWidget />
+                    {/* Phone mode toggle button */}
+                    <Button
+                      variant="ghost"
+                      size="sm"
+                      onClick={() => setPhoneMode(!isPhoneMode)}
+                      className="min-h-[44px] min-w-[44px] p-2 flex-shrink-0"
+                      data-testid="button-phone-mode-toggle"
+                      title="Basculer vers le mode normal"
+                    >
+                      <Monitor className="h-4 w-4 text-blue-600" />
+                    </Button>
+                  </div>
+                ) : (
+                  <>
+                    <WeatherWidget />
+                    {!isMobile && <DateWidget />}
+                    
+                    {/* Phone mode toggle button */}
+                    {canUsePhoneMode && (
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => setPhoneMode(!isPhoneMode)}
+                        className="min-h-[44px] min-w-[44px] p-2 flex-shrink-0"
+                        data-testid="button-phone-mode-toggle"
+                        title="Basculer vers le mode téléphone"
+                      >
+                        <Smartphone className="h-4 w-4 text-gray-600" />
+                      </Button>
+                    )}
+                  </>
+                )}
               </div>
             </div>
 
             {/* Store selector for admin, directeur, and manager - responsive */}
-            {user && (user.role === 'admin' || user.role === 'directeur' || user.role === 'manager') && stores.length > 0 && (
+            {!isPhoneMode && user && (user.role === 'admin' || user.role === 'directeur' || user.role === 'manager') && stores.length > 0 && (
               <div className="flex items-center gap-1 sm:gap-2 flex-shrink-0">
                 <Store className="h-4 w-4 text-gray-500 hidden sm:block" />
                 <Select
@@ -253,11 +299,16 @@ export default function Layout({ children }: LayoutProps) {
           )}
 
           <div className={`flex-1 bg-gray-50 h-full overflow-y-auto ${
-            isMobileOrTablet ? 'p-3' : 'p-6'
+            isPhoneMode 
+              ? 'p-2' // Mode téléphone : padding réduit
+              : isMobileOrTablet ? 'p-3' : 'p-6'
           }`}>
             {children}
           </div>
         </main>
+        
+        {/* Bottom navigation for phone mode (only when authenticated) */}
+        {isPhoneMode && user && <PhoneBottomNav user={user} location={location} />}
       </div>
     </StoreProvider>
   );
diff --git a/client/src/components/PhoneBottomNav.tsx b/client/src/components/PhoneBottomNav.tsx
new file mode 100644
index 0000000..ccb4cd8
--- /dev/null
+++ b/client/src/components/PhoneBottomNav.tsx
@@ -0,0 +1,148 @@
+import { Home, Package, Truck, ClipboardList, MoreHorizontal } from "lucide-react"
+import { Link, useLocation } from "wouter"
+import { useState } from "react"
+import { Button } from "@/components/ui/button"
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+  SheetTrigger,
+} from "@/components/ui/sheet"
+import type { User } from "@shared/schema"
+
+interface NavItem {
+  path: string
+  label: string
+  icon: any
+  primary?: boolean
+}
+
+interface MoreMenuItem {
+  path: string
+  label: string
+  icon: any
+  roles?: string[]
+}
+
+const primaryNavItems: NavItem[] = [
+  { path: "/", label: "Accueil", icon: Home, primary: true },
+  { path: "/orders", label: "Commandes", icon: Package, primary: true },
+  { path: "/deliveries", label: "Livraisons", icon: Truck, primary: true },
+  { path: "/tasks", label: "Tâches", icon: ClipboardList, primary: true },
+]
+
+const moreMenuItems: MoreMenuItem[] = [
+  { path: "/bl-reconciliation", label: "Rapprochement", icon: ClipboardList, roles: ["admin", "directeur", "manager"] },
+  { path: "/publicities", label: "Publicités", icon: Package, roles: ["admin", "directeur", "manager"] },
+  { path: "/customer-orders", label: "Commandes Clients", icon: Package, roles: ["admin", "directeur", "manager"] },
+  { path: "/avoirs", label: "Avoirs", icon: Package, roles: ["admin", "directeur", "manager"] },
+  { path: "/dlc", label: "DLC", icon: Package, roles: ["admin", "directeur", "manager"] },
+  { path: "/sav", label: "SAV", icon: ClipboardList, roles: ["admin", "directeur", "manager"] },
+  { path: "/calendar", label: "Calendrier", icon: ClipboardList },
+]
+
+interface PhoneBottomNavProps {
+  user: User
+  location: string
+}
+
+export default function PhoneBottomNav({ user, location }: PhoneBottomNavProps) {
+  const [moreSheetOpen, setMoreSheetOpen] = useState(false)
+
+  const isActive = (path: string) => {
+    if (path === "/") return location === "/"
+    return location.startsWith(path)
+  }
+
+  const hasPermission = (roles?: string[]) => {
+    if (!roles || !user) return true
+    return roles.includes(user.role)
+  }
+
+  const filteredMoreItems = moreMenuItems.filter(item => hasPermission(item.roles))
+
+  return (
+    <div className="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 z-50 safe-area-pb bottom-nav">
+      <div className="flex items-center justify-around py-2 px-1">
+        {/* Navigation principale */}
+        {primaryNavItems.map((item) => {
+          const Icon = item.icon
+          const active = isActive(item.path)
+          
+          return (
+            <Link key={item.path} href={item.path}>
+              <div
+                className={`flex flex-col items-center justify-center min-w-[60px] py-2 px-1 rounded-lg transition-all duration-200 ${
+                  active 
+                    ? 'bg-blue-50 text-blue-600' 
+                    : 'text-gray-600 hover:bg-gray-50'
+                }`}
+                data-testid={`nav-${item.path.replace('/', 'home')}`}
+              >
+                <Icon className={`w-5 h-5 ${active ? 'text-blue-600' : 'text-gray-600'}`} />
+                <span className={`text-xs mt-1 font-medium ${
+                  active ? 'text-blue-600' : 'text-gray-600'
+                }`}>
+                  {item.label}
+                </span>
+              </div>
+            </Link>
+          )
+        })}
+
+        {/* Menu "Plus" */}
+        <Sheet open={moreSheetOpen} onOpenChange={setMoreSheetOpen}>
+          <SheetTrigger asChild>
+            <div
+              className="flex flex-col items-center justify-center min-w-[60px] py-2 px-1 rounded-lg transition-all duration-200 text-gray-600 hover:bg-gray-50 cursor-pointer"
+              data-testid="nav-more"
+            >
+              <MoreHorizontal className="w-5 h-5 text-gray-600" />
+              <span className="text-xs mt-1 font-medium text-gray-600">Plus</span>
+            </div>
+          </SheetTrigger>
+          <SheetContent side="bottom" className="h-auto max-h-[60vh] rounded-t-lg">
+            <SheetHeader>
+              <SheetTitle>Navigation</SheetTitle>
+              <SheetDescription>
+                Accédez aux autres sections de l'application
+              </SheetDescription>
+            </SheetHeader>
+            <div className="grid grid-cols-3 gap-4 mt-6 pb-4">
+              {filteredMoreItems.map((item) => {
+                const Icon = item.icon
+                const active = isActive(item.path)
+                
+                return (
+                  <Link 
+                    key={item.path} 
+                    href={item.path}
+                    onClick={() => setMoreSheetOpen(false)}
+                  >
+                    <div
+                      className={`flex flex-col items-center justify-center p-4 rounded-lg transition-all duration-200 min-h-[80px] ${
+                        active 
+                          ? 'bg-blue-50 text-blue-600 border-2 border-blue-200' 
+                          : 'bg-gray-50 text-gray-700 hover:bg-gray-100 border-2 border-transparent'
+                      }`}
+                      data-testid={`more-nav-${item.path.replace('/', '')}`}
+                    >
+                      <Icon className={`w-6 h-6 ${active ? 'text-blue-600' : 'text-gray-600'}`} />
+                      <span className={`text-sm mt-2 font-medium text-center ${
+                        active ? 'text-blue-600' : 'text-gray-700'
+                      }`}>
+                        {item.label}
+                      </span>
+                    </div>
+                  </Link>
+                )
+              })}
+            </div>
+          </SheetContent>
+        </Sheet>
+      </div>
+    </div>
+  )
+}
\ No newline at end of file
diff --git a/client/src/components/RouterProduction.tsx b/client/src/components/RouterProduction.tsx
index 3081448..f265020 100644
--- a/client/src/components/RouterProduction.tsx
+++ b/client/src/components/RouterProduction.tsx
@@ -105,6 +105,17 @@ function RouterProduction() {
         <Route path="/database-debug" component={Utilities} />
         <Route path="/weather-settings" component={Utilities} />
         
+        {/* Redirection depuis /auth vers dashboard après authentification */}
+        <Route path="/auth">
+          {() => {
+            if (typeof window !== 'undefined') {
+              console.log('🔄 Authenticated user on /auth, redirecting to dashboard');
+              window.location.href = '/';
+            }
+            return <Dashboard />;
+          }}
+        </Route>
+        
         <Route path="/" component={Dashboard} />
         <Route component={NotFound} />
       </Switch>
diff --git a/client/src/hooks/use-phone-mode.ts b/client/src/hooks/use-phone-mode.ts
new file mode 100644
index 0000000..e4183a2
--- /dev/null
+++ b/client/src/hooks/use-phone-mode.ts
@@ -0,0 +1,82 @@
+import { useState, useEffect } from 'react'
+import { useScreenSize } from './use-screen-size'
+
+export interface PhoneModeConfig {
+  isPhoneMode: boolean
+  setPhoneMode: (enabled: boolean) => void
+  canUsePhoneMode: boolean
+  autoSuggestPhoneMode: boolean
+}
+
+export function usePhoneMode(): PhoneModeConfig {
+  const { isMobile, dimensions } = useScreenSize()
+  
+  // Déterminer si l'appareil peut bénéficier du mode téléphone
+  const canUsePhoneMode = isMobile || dimensions.width <= 480
+  
+  // Auto-suggestion pour très petits écrans (< 400px)
+  const autoSuggestPhoneMode = dimensions.width < 400
+  
+  const [isPhoneMode, setIsPhoneMode] = useState<boolean>(() => {
+    try {
+      const saved = localStorage.getItem('phoneMode')
+      if (saved !== null) {
+        return JSON.parse(saved)
+      }
+      
+      // Auto-activation pour très petits écrans
+      if (autoSuggestPhoneMode) {
+        return true
+      }
+      
+      return false
+    } catch (error) {
+      console.error('Error reading phone mode from localStorage:', error)
+      return autoSuggestPhoneMode
+    }
+  })
+
+  const setPhoneMode = (enabled: boolean) => {
+    setIsPhoneMode(enabled)
+    try {
+      localStorage.setItem('phoneMode', JSON.stringify(enabled))
+      console.log('📱 Phone mode preference saved:', enabled)
+    } catch (error) {
+      console.error('Error saving phone mode to localStorage:', error)
+    }
+  }
+
+  // Effect pour activer automatiquement le mode téléphone selon la largeur
+  useEffect(() => {
+    const saved = localStorage.getItem('phoneMode')
+    if (saved !== null) return // L'utilisateur a une préférence explicite, ne pas override
+    
+    const shouldEnable = dimensions.width < 400
+    if (isPhoneMode !== shouldEnable) {
+      console.log('📱 Auto-toggling phone mode:', { 
+        width: dimensions.width, 
+        shouldEnable, 
+        currentMode: isPhoneMode 
+      })
+      setIsPhoneMode(shouldEnable)
+    }
+  }, [dimensions.width, isPhoneMode])
+
+  // Effect pour logger les changements de mode
+  useEffect(() => {
+    console.log('📱 Phone mode state:', {
+      isPhoneMode,
+      canUsePhoneMode,
+      autoSuggestPhoneMode,
+      screenWidth: dimensions.width,
+      isMobile
+    })
+  }, [isPhoneMode, canUsePhoneMode, autoSuggestPhoneMode, dimensions.width, isMobile])
+
+  return {
+    isPhoneMode,
+    setPhoneMode,
+    canUsePhoneMode,
+    autoSuggestPhoneMode
+  }
+}
\ No newline at end of file
diff --git a/client/src/index.css b/client/src/index.css
index f0f5908..8bf46e5 100644
--- a/client/src/index.css
+++ b/client/src/index.css
@@ -396,3 +396,92 @@ button[data-day-weekend="true"],
 .bg-gray-150 {
   background-color: #f1f3f4;
 }
+
+/* Styles pour le mode téléphone */
+.phone-mode {
+  /* Classe principale pour le mode téléphone */
+}
+
+/* Safe area pour la bottom navigation */
+.safe-area-pb {
+  padding-bottom: env(safe-area-inset-bottom);
+}
+
+/* Optimisations pour le mode téléphone */
+.layout-container.phone-mode {
+  /* Assurer que le layout prend toute la hauteur */
+  height: 100vh;
+  overflow: hidden;
+}
+
+.phone-mode main {
+  /* Optimisation pour le scroll sur téléphone */
+  overflow-x: hidden;
+}
+
+.phone-mode .main-content {
+  /* Padding bottom pour éviter que le contenu soit caché par la bottom nav */
+  padding-bottom: calc(80px + env(safe-area-inset-bottom));
+}
+
+/* Animation de transition pour le basculement de mode */
+.layout-container {
+  transition: all 0.3s ease-in-out;
+}
+
+/* Styles spécifiques pour la bottom navigation */
+.bottom-nav {
+  backdrop-filter: blur(10px);
+  background-color: rgba(255, 255, 255, 0.95);
+}
+
+/* Dark mode pour la bottom navigation */
+.dark .bottom-nav {
+  background-color: rgba(26, 26, 26, 0.95);
+}
+
+/* Optimisation des cartes pour le mode téléphone */
+.phone-mode .card {
+  border-radius: 12px;
+  margin-bottom: 16px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+}
+
+/* Optimisation des boutons pour le mode téléphone */
+.phone-mode button {
+  min-height: 48px;
+}
+
+/* Style pour les éléments interactifs en mode téléphone */
+.phone-mode .interactive-element {
+  min-height: 48px;
+  min-width: 48px;
+  padding: 12px;
+}
+
+/* Adaptation des formulaires pour téléphone */
+.phone-mode .form-container {
+  padding: 16px;
+  max-width: 100%;
+}
+
+.phone-mode input, 
+.phone-mode select, 
+.phone-mode textarea {
+  min-height: 48px;
+  font-size: 16px; /* Évite le zoom automatique sur iOS */
+}
+
+/* Optimisation des modals pour téléphone */
+.phone-mode .modal-content {
+  margin: 8px;
+  max-height: calc(100vh - 16px);
+  border-radius: 16px;
+}
+
+/* Style pour les alertes en mode téléphone */
+.phone-mode .alert {
+  margin: 8px;
+  border-radius: 12px;
+  padding: 16px;
+}