add auth

lib/features/auth/data/datasources/auth_local_datasource.dart

@@ -20,6 +20,7 @@ class AuthLocalDataSource {
   static const String _fullNameKey = 'auth_session_full_name';
   static const String _createdAtKey = 'auth_session_created_at';
   static const String _appsKey = 'auth_session_apps';
+  static const String _rememberMeKey = 'auth_remember_me';
 
   AuthLocalDataSource(this._secureStorage);
 
@@ -102,21 +103,46 @@ class AuthLocalDataSource {
     return sid != null && csrfToken != null;
   }
 
+  /// Save "Remember Me" preference
+  ///
+  /// If true, user session will be restored on next app launch.
+  Future<void> saveRememberMe(bool rememberMe) async {
+    await _secureStorage.write(
+      key: _rememberMeKey,
+      value: rememberMe.toString(),
+    );
+  }
+
+  /// Get "Remember Me" preference
+  ///
+  /// Returns true if user wants to be remembered, false otherwise.
+  Future<bool> getRememberMe() async {
+    final value = await _secureStorage.read(key: _rememberMeKey);
+    return value == 'true';
+  }
+
   /// Clear session data
   ///
-  /// Called during logout to remove all session information.
+  /// Called during logout to remove all session information including rememberMe.
   Future<void> clearSession() async {
+    // Clear all session data including rememberMe
     await _secureStorage.delete(key: _sidKey);
     await _secureStorage.delete(key: _csrfTokenKey);
     await _secureStorage.delete(key: _fullNameKey);
     await _secureStorage.delete(key: _createdAtKey);
     await _secureStorage.delete(key: _appsKey);
+    await _secureStorage.delete(key: _rememberMeKey);
   }
 
-  /// Clear all authentication data
+  /// Clear all authentication data including remember me
   ///
   /// Complete cleanup of all stored auth data.
   Future<void> clearAll() async {
-    await _secureStorage.deleteAll();
+    await _secureStorage.delete(key: _sidKey);
+    await _secureStorage.delete(key: _csrfTokenKey);
+    await _secureStorage.delete(key: _fullNameKey);
+    await _secureStorage.delete(key: _createdAtKey);
+    await _secureStorage.delete(key: _appsKey);
+    await _secureStorage.delete(key: _rememberMeKey);
   }
 }