feat: Update biometric icon color to match theme and enhance visibility

lib/screens/biometric_choice_screen.dart

@@ -56,9 +56,10 @@ class BiometricChoiceScreen extends StatelessWidget {
                           mainAxisSize: MainAxisSize.min,
                           crossAxisAlignment: CrossAxisAlignment.stretch,
                           children: [
-                            const Icon(
+                            Icon(
                               Icons.fingerprint,
                               size: 44,
+                              color: IconTheme.of(context).color,
                             ),
                             const SizedBox(height: 16),
                             const Text(

lib/screens/biometric_gate_screen.dart

@@ -80,9 +80,10 @@ class _BiometricGateScreenState extends State<BiometricGateScreen> {
                           mainAxisSize: MainAxisSize.min,
                           crossAxisAlignment: CrossAxisAlignment.stretch,
                           children: [
-                            const Icon(
+                            Icon(
                               Icons.fingerprint,
                               size: 44,
+                              color: IconTheme.of(context).color,
                             ),
                             const SizedBox(height: 16),
                             const Text(

lib/widgets/menu_drawer.dart

@@ -42,6 +42,8 @@ class MenuDrawer extends StatelessWidget {
             label: 'Mis notas borradas',
             selected: selectedItem == 'deleted_notes',
             onTap: () => onMenuItemTapped?.call('deleted_notes'),
+            iconColor: Colors.redAccent,
+            textColor: Colors.redAccent,
           ),
           const Divider(color: Colors.white12, height: 16),
           _MenuItemTile(
@@ -62,12 +64,16 @@ class _MenuItemTile extends StatelessWidget {
     required this.label,
     this.selected = false,
     this.onTap,
+    this.iconColor,
+    this.textColor,
   });
 
   final IconData icon;
   final String label;
   final bool selected;
   final VoidCallback? onTap;
+  final Color? iconColor;
+  final Color? textColor;
 
   @override
   Widget build(BuildContext context) {
@@ -95,10 +101,10 @@ class _MenuItemTile extends StatelessWidget {
             : BorderRadius.circular(12),
       ),
       child: ListTile(
-        leading: Icon(icon, color: foregroundColor),
+        leading: Icon(icon, color: iconColor ?? foregroundColor),
         title: Text(
           label,
-          style: TextStyle(color: foregroundColor, fontSize: 14),
+          style: TextStyle(color: textColor ?? foregroundColor, fontSize: 14),
         ),
         onTap: onTap,
         hoverColor: Colors.white.withValues(alpha: 0.1),