feat: Update biometric screens to remove amber color from fingerprint icon for consistency

lib/screens/biometric_choice_screen.dart

@@ -58,7 +58,6 @@ class BiometricChoiceScreen extends StatelessWidget {
                           children: [
                             const Icon(
                               Icons.fingerprint,
-                              color: Colors.amber,
                               size: 44,
                             ),
                             const SizedBox(height: 16),

lib/screens/biometric_gate_screen.dart

@@ -82,7 +82,6 @@ class _BiometricGateScreenState extends State<BiometricGateScreen> {
                           children: [
                             const Icon(
                               Icons.fingerprint,
-                              color: Colors.amber,
                               size: 44,
                             ),
                             const SizedBox(height: 16),

lib/screens/note_editor_screen.dart

@@ -65,7 +65,9 @@ class NoteEditorScreen extends StatefulWidget {
             if (!completer.isCompleted) {
               completer.complete(result);
             }
-            entry.remove();
+            if (entry.mounted) {
+              entry.remove();
+            }
           },
         );
       },
@@ -146,45 +148,173 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
     _complete(updatedNote);
   }
 
-  void _deleteNote() {
+  Future<bool> _showDeleteConfirmation() async {
     final bool isDeletedNote = _currentNote.isDeleted;
-    showDialog(
+
-      context: context,
+    if (_isMobileLayout) {
-      builder: (BuildContext context) {
+      final bool? confirmed = await showDialog<bool>(
-        return AlertDialog(
+        context: context,
-          backgroundColor: const Color(0xFF303134),
+        barrierDismissible: false,
-          title: Text(
+        barrierColor: Colors.transparent,
-            isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar nota',
+        builder: (BuildContext dialogContext) {
-            style: const TextStyle(color: Colors.white),
+          return AlertDialog(
-          ),
+            backgroundColor: const Color(0xFF303134),
-          content: Text(
+            title: Text(
-            isDeletedNote
+              isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar nota',
-                ? 'Esta nota ya está borrada. Si la eliminas ahora, se borrará permanentemente.'
+              style: const TextStyle(color: Colors.white),
-                : '¿Estás seguro de que deseas eliminar esta nota?',
-            style: const TextStyle(color: Colors.white70),
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.of(context).pop(),
-              child: const Text(
-                'Cancelar',
-                style: TextStyle(color: Colors.white70),
-              ),
             ),
-            TextButton(
+            content: Text(
-              onPressed: () {
+              isDeletedNote
-                Navigator.of(context).pop();
+                  ? 'Esta nota ya está borrada. Si la eliminas ahora, se borrará permanentemente.'
-                _complete('delete');
+                  : '¿Estás seguro de que deseas eliminar esta nota?',
-              },
+              style: const TextStyle(color: Colors.white70),
-              child: Text(
-                isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar',
-                style: const TextStyle(color: Colors.red),
-              ),
             ),
-          ],
+            actions: [
+              TextButton(
+                onPressed: () => Navigator.of(dialogContext).pop(false),
+                child: const Text(
+                  'Cancelar',
+                  style: TextStyle(color: Colors.white70),
+                ),
+              ),
+              TextButton(
+                onPressed: () => Navigator.of(dialogContext).pop(true),
+                child: Text(
+                  isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar',
+                  style: const TextStyle(color: Colors.red),
+                ),
+              ),
+            ],
+          );
+        },
+      );
+
+      return confirmed ?? false;
+    }
+
+    final OverlayState? overlayState = Overlay.of(context, rootOverlay: true);
+    if (overlayState == null) {
+      final bool? confirmed = await showDialog<bool>(
+        context: context,
+        barrierDismissible: false,
+        barrierColor: Colors.transparent,
+        builder: (BuildContext dialogContext) {
+          return AlertDialog(
+            backgroundColor: const Color(0xFF303134),
+            title: Text(
+              isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar nota',
+              style: const TextStyle(color: Colors.white),
+            ),
+            content: Text(
+              isDeletedNote
+                  ? 'Esta nota ya está borrada. Si la eliminas ahora, se borrará permanentemente.'
+                  : '¿Estás seguro de que deseas eliminar esta nota?',
+              style: const TextStyle(color: Colors.white70),
+            ),
+            actions: [
+              TextButton(
+                onPressed: () => Navigator.of(dialogContext).pop(false),
+                child: const Text(
+                  'Cancelar',
+                  style: TextStyle(color: Colors.white70),
+                ),
+              ),
+              TextButton(
+                onPressed: () => Navigator.of(dialogContext).pop(true),
+                child: Text(
+                  isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar',
+                  style: const TextStyle(color: Colors.red),
+                ),
+              ),
+            ],
+          );
+        },
+      );
+
+      return confirmed ?? false;
+    }
+
+    final Completer<bool> completer = Completer<bool>();
+    late final OverlayEntry entry;
+    bool didRemove = false;
+
+    void close(bool confirmed) {
+      if (!completer.isCompleted) {
+        completer.complete(confirmed);
+      }
+      if (!didRemove && entry.mounted) {
+        didRemove = true;
+        entry.remove();
+      }
+    }
+
+    entry = OverlayEntry(
+      builder: (BuildContext overlayContext) {
+        return Material(
+          color: Colors.transparent,
+          child: Stack(
+            children: [
+              const Positioned.fill(
+                child: ModalBarrier(
+                  dismissible: false,
+                  color: Color.fromARGB(140, 0, 0, 0),
+                ),
+              ),
+              Center(
+                child: ConstrainedBox(
+                  constraints: const BoxConstraints(maxWidth: 420),
+                  child: AlertDialog(
+                    backgroundColor: const Color(0xFF303134),
+                    title: Text(
+                      isDeletedNote
+                          ? 'Eliminar permanentemente'
+                          : 'Eliminar nota',
+                      style: const TextStyle(color: Colors.white),
+                    ),
+                    content: Text(
+                      isDeletedNote
+                          ? 'Esta nota ya está borrada. Si la eliminas ahora, se borrará permanentemente.'
+                          : '¿Estás seguro de que deseas eliminar esta nota?',
+                      style: const TextStyle(color: Colors.white70),
+                    ),
+                    actions: [
+                      TextButton(
+                        onPressed: () => close(false),
+                        child: const Text(
+                          'Cancelar',
+                          style: TextStyle(color: Colors.white70),
+                        ),
+                      ),
+                      TextButton(
+                        onPressed: () => close(true),
+                        child: Text(
+                          isDeletedNote
+                              ? 'Eliminar permanentemente'
+                              : 'Eliminar',
+                          style: const TextStyle(color: Colors.red),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ],
+          ),
         );
       },
     );
+
+    overlayState.insert(entry);
+    return completer.future;
+  }
+
+  Future<void> _deleteNote() async {
+    final bool confirmed = await _showDeleteConfirmation();
+    if (!mounted || !confirmed) {
+      return;
+    }
+
+    _complete('delete');
   }
 
   String _formatDate(DateTime date) {