diff --git a/mobile/api/client.ts b/mobile/api/client.ts
index 13df5a2..ceca53b 100644
--- a/mobile/api/client.ts
+++ b/mobile/api/client.ts
@@ -14,6 +14,10 @@ class ApiClient {
     this.accessToken = token;
   }
 
+  getAccessToken(): string | null {
+    return this.accessToken;
+  }
+
   private async request<T>(
     endpoint: string,
     options: RequestInit = {},
diff --git a/mobile/app/file-edit.tsx b/mobile/app/file-edit.tsx
index ce7966e..6341649 100644
--- a/mobile/app/file-edit.tsx
+++ b/mobile/app/file-edit.tsx
@@ -19,6 +19,8 @@ import { useUpload } from '../hooks/useUpload';
 import { TagChip } from '../components/TagChip';
 import { FileThumbnail } from '../components/FileThumbnail';
 import { FileItem } from '../types';
+import { apiClient } from '../api/client';
+import { ENDPOINTS } from '../constants/api';
 
 const NUM_COLUMNS = 3;
 const SCREEN_WIDTH = Dimensions.get('window').width;
@@ -132,8 +134,7 @@ export function FileEditScreen() {
       const imageUris: { uri: string }[] = [];
 
       for (const fileId of targetIds) {
-        const response = await fetch(`${process.env.EXPO_PUBLIC_API_BASE_URL || 'http://192.168.1.17:8080/api/v1'}/files/${fileId}`);
-        const data = await response.json();
+        const data = await apiClient.get<{ data: { url: string } }>(`${ENDPOINTS.FILES}/${fileId}`);
         const url = data?.data?.url;
         if (url) {
           imageUris.push({ uri: url });
diff --git a/mobile/app/login.tsx b/mobile/app/login.tsx
index d53b99a..232a509 100644
--- a/mobile/app/login.tsx
+++ b/mobile/app/login.tsx
@@ -46,6 +46,7 @@ export function LoginScreen({ navigation }: any) {
         <TextInput
           style={styles.input}
           placeholder="Nom d'utilisateur"
+          placeholderTextColor="#999"
           value={username}
           onChangeText={setUsername}
           autoCapitalize="none"
@@ -56,6 +57,7 @@ export function LoginScreen({ navigation }: any) {
         <TextInput
           style={styles.input}
           placeholder="Mot de passe"
+          placeholderTextColor="#999"
           value={password}
           onChangeText={setPassword}
           secureTextEntry
diff --git a/mobile/app/register.tsx b/mobile/app/register.tsx
index ada2208..58e55a9 100644
--- a/mobile/app/register.tsx
+++ b/mobile/app/register.tsx
@@ -57,6 +57,7 @@ export function RegisterScreen({ navigation }: any) {
         <TextInput
           style={styles.input}
           placeholder="Nom d'utilisateur"
+          placeholderTextColor="#999"
           value={username}
           onChangeText={setUsername}
           autoCapitalize="none"
@@ -67,6 +68,7 @@ export function RegisterScreen({ navigation }: any) {
         <TextInput
           style={styles.input}
           placeholder="Mot de passe"
+          placeholderTextColor="#999"
           value={password}
           onChangeText={setPassword}
           secureTextEntry
@@ -76,6 +78,7 @@ export function RegisterScreen({ navigation }: any) {
         <TextInput
           style={styles.input}
           placeholder="Confirmer le mot de passe"
+          placeholderTextColor="#999"
           value={confirmPassword}
           onChangeText={setConfirmPassword}
           secureTextEntry
diff --git a/mobile/hooks/useUpload.ts b/mobile/hooks/useUpload.ts
index 10e81f8..ce2ea76 100644
--- a/mobile/hooks/useUpload.ts
+++ b/mobile/hooks/useUpload.ts
@@ -15,11 +15,17 @@ export function useUpload() {
       const results = await Promise.allSettled(
         files.map(async (file) => {
           const fsFile = new File(file.uri);
+          const headers: Record<string, string> = {};
+          const token = apiClient.getAccessToken();
+          if (token) {
+            headers['Authorization'] = `Bearer ${token}`;
+          }
           const result = await fsFile.upload(`${API_BASE_URL}${ENDPOINTS.UPLOAD}`, {
             httpMethod: 'POST',
             uploadType: UploadType.MULTIPART,
             fieldName: 'file',
             mimeType: file.type,
+            headers,
           });
 
           if (result.status >= 400) {