diff --git a/app/_layout.tsx b/app/_layout.tsx
index de72729..81834ea 100644
--- a/app/_layout.tsx
+++ b/app/_layout.tsx
@@ -1,9 +1,10 @@
 import React, { useEffect, useState } from 'react';
 import { View } from 'react-native';
 import { Stack, useRouter, useSegments } from 'expo-router';
-import { PaperProvider, MD3DarkTheme, ActivityIndicator, Snackbar } from 'react-native-paper';
+import { PaperProvider, MD3DarkTheme, ActivityIndicator, Snackbar, Button, Text } from 'react-native-paper';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
+import * as LocalAuthentication from 'expo-local-authentication';
 import { useAppStore } from '../src/store/appStore';
 import { registerToastCallback } from '../src/utils/errorHandler';
 
@@ -36,7 +37,7 @@ const APP_THEME = {
 export default function RootLayout() {
   const router = useRouter();
   const segments = useSegments();
-  const { config, loadConfig } = useAppStore();
+  const { config, preferences, isAuthenticated, loadConfig, setAuthenticated } = useAppStore();
   const [isReady, setIsReady] = useState(false);
   const [toastMessage, setToastMessage] = useState('');
   const [toastVisible, setToastVisible] = useState(false);
@@ -52,25 +53,44 @@ export default function RootLayout() {
     });
   }, []);
 
-  /** Charge la configuration depuis le secure store puis marque l'app comme prête */
+  const runBiometricAuth = async (): Promise<boolean> => {
+    const result = await LocalAuthentication.authenticateAsync({
+      promptMessage: 'Authentifiez-vous pour accéder à n8n Pilot',
+      cancelLabel: 'Annuler',
+    });
+    return result.success;
+  };
+
   useEffect(() => {
-    loadConfig().finally(() => setIsReady(true));
+    const init = async () => {
+      await loadConfig();
+      const { preferences: prefs } = useAppStore.getState();
+      if (prefs.biometricEnabled) {
+        const success = await runBiometricAuth();
+        setAuthenticated(success);
+      } else {
+        setAuthenticated(true);
+      }
+      setIsReady(true);
+    };
+    init();
   }, []);
 
-  /**
-   * Gère la redirection initiale selon l'état de configuration.
-   * - Pas configuré et hors /setup → redirige vers /setup
-   * - Configuré et dans /setup → redirige vers les tabs
-   */
+  const handleUnlock = async (): Promise<void> => {
+    const success = await runBiometricAuth();
+    if (success) setAuthenticated(true);
+  };
+
   useEffect(() => {
     if (!isReady) return;
+    if (preferences.biometricEnabled && !isAuthenticated) return;
     const inSetup = segments[0] === 'setup';
     if (!config.isConfigured && !inSetup) {
       router.replace('/setup');
     } else if (config.isConfigured && inSetup) {
       router.replace('/(tabs)');
     }
-  }, [isReady, config.isConfigured, segments]);
+  }, [isReady, config.isConfigured, isAuthenticated, preferences.biometricEnabled, segments]);
 
   if (!isReady) {
     return (
@@ -80,6 +100,28 @@ export default function RootLayout() {
     );
   }
 
+  if (preferences.biometricEnabled && !isAuthenticated) {
+    return (
+      <GestureHandlerRootView style={{ flex: 1 }}>
+        <SafeAreaProvider>
+          <PaperProvider theme={APP_THEME}>
+            <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center', backgroundColor: '#121212', paddingHorizontal: 32 }}>
+              <Text variant="headlineMedium" style={{ color: '#FF6D3E', marginBottom: 12 }}>
+                n8n Pilot
+              </Text>
+              <Text variant="bodyMedium" style={{ color: '#FFFFFF', marginBottom: 32, textAlign: 'center' }}>
+                Authentification biométrique requise
+              </Text>
+              <Button mode="contained" onPress={handleUnlock} icon="fingerprint">
+                Déverrouiller
+              </Button>
+            </View>
+          </PaperProvider>
+        </SafeAreaProvider>
+      </GestureHandlerRootView>
+    );
+  }
+
   return (
     <GestureHandlerRootView style={{ flex: 1 }}>
       <SafeAreaProvider>
diff --git a/src/api/client.ts b/src/api/client.ts
index f6798d4..3dddefa 100644
--- a/src/api/client.ts
+++ b/src/api/client.ts
@@ -15,6 +15,7 @@ export const SECURE_STORE_KEYS = {
   BASE_URL: 'n8n_base_url',
   API_KEY: 'n8n_api_key',
   APP_TOKEN: 'n8n_app_token',
+  BIOMETRIC_ENABLED: 'n8n_biometric_enabled',
 } as const;
 
 /**
diff --git a/src/api/executions.ts b/src/api/executions.ts
index 22433c2..5e482ee 100644
--- a/src/api/executions.ts
+++ b/src/api/executions.ts
@@ -93,7 +93,9 @@ export const fetchExecutions = async (
  * @returns Exécution complète avec données de nœuds
  */
 export const fetchExecutionById = async (id: string): Promise<Execution> => {
-  const response = await apiClient.get<Execution>(`/api/v1/executions/${id}`);
+  const response = await apiClient.get<Execution>(`/api/v1/executions/${id}`, {
+    params: { includeData: true },
+  });
   return response.data;
 };
 
diff --git a/src/hooks/useWorkflows.ts b/src/hooks/useWorkflows.ts
index abc86a8..8ceea8f 100644
--- a/src/hooks/useWorkflows.ts
+++ b/src/hooks/useWorkflows.ts
@@ -96,11 +96,7 @@ export const useWorkflows = (): UseWorkflowsResult => {
   }, []);
 
   const triggerWorkflow = useCallback(async (id: string): Promise<void> => {
-    try {
-      await runWorkflow(id);
-    } catch {
-      // Géré par l'intercepteur Axios
-    }
+    await runWorkflow(id);
   }, []);
 
   return {
diff --git a/src/screens/SettingsScreen.tsx b/src/screens/SettingsScreen.tsx
index 91e74f2..a698659 100644
--- a/src/screens/SettingsScreen.tsx
+++ b/src/screens/SettingsScreen.tsx
@@ -122,6 +122,7 @@ const SettingsScreen: React.FC = () => {
               SecureStore.deleteItemAsync(SECURE_STORE_KEYS.BASE_URL),
               SecureStore.deleteItemAsync(SECURE_STORE_KEYS.API_KEY),
               SecureStore.deleteItemAsync(SECURE_STORE_KEYS.APP_TOKEN),
+              SecureStore.deleteItemAsync(SECURE_STORE_KEYS.BIOMETRIC_ENABLED),
             ]);
             setBaseUrl('');
             setApiKey('');
diff --git a/src/screens/WorkflowsScreen.tsx b/src/screens/WorkflowsScreen.tsx
index d07360b..69c2815 100644
--- a/src/screens/WorkflowsScreen.tsx
+++ b/src/screens/WorkflowsScreen.tsx
@@ -23,8 +23,12 @@ const WorkflowsScreen: React.FC = () => {
    * @param id - Identifiant du workflow à lancer
    */
   const handleRun = async (id: string): Promise<void> => {
-    await triggerWorkflow(id);
-    setSnackMessage('Workflow déclenché avec succès');
+    try {
+      await triggerWorkflow(id);
+      setSnackMessage('Exécution déclenchée');
+    } catch {
+      // L'intercepteur Axios a déjà affiché le toast d'erreur
+    }
   };
 
   /**
diff --git a/src/store/appStore.ts b/src/store/appStore.ts
index b6454c5..dae648b 100644
--- a/src/store/appStore.ts
+++ b/src/store/appStore.ts
@@ -83,23 +83,36 @@ export const useAppStore = create<AppState>((set) => ({
   loadConfig: async () => {
     set({ isLoading: true });
     try {
-      // Seule l'URL est lue dans le store visible — les secrets restent dans le secure store
-      const baseUrl = await SecureStore.getItemAsync(SECURE_STORE_KEYS.BASE_URL);
+      const [baseUrl, biometricRaw] = await Promise.all([
+        SecureStore.getItemAsync(SECURE_STORE_KEYS.BASE_URL),
+        SecureStore.getItemAsync(SECURE_STORE_KEYS.BIOMETRIC_ENABLED),
+      ]);
       set({
         config: {
           baseUrl: baseUrl ?? '',
           isConfigured: !!baseUrl,
         },
+        preferences: {
+          pollingInterval: 30_000,
+          biometricEnabled: biometricRaw === 'true',
+        },
       });
     } finally {
       set({ isLoading: false });
     }
   },
 
-  setPreferences: (prefs) =>
+  setPreferences: (prefs) => {
+    if ('biometricEnabled' in prefs) {
+      SecureStore.setItemAsync(
+        SECURE_STORE_KEYS.BIOMETRIC_ENABLED,
+        prefs.biometricEnabled ? 'true' : 'false'
+      ).catch(() => {});
+    }
     set((state) => ({
       preferences: { ...state.preferences, ...prefs },
-    })),
+    }));
+  },
 
   setAuthenticated: (auth) => set({ isAuthenticated: auth }),
 }));