feat: Implement permanent deletion and restoration of notes with updated UI

lib/screens/note_editor_screen.dart

@@ -93,18 +93,21 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
   }
 
   void _deleteNote() {
+    final bool isDeletedNote = _currentNote.isDeleted;
     showDialog(
       context: context,
       builder: (BuildContext context) {
         return AlertDialog(
           backgroundColor: const Color(0xFF303134),
-          title: const Text(
-            'Eliminar nota',
-            style: TextStyle(color: Colors.white),
+          title: Text(
+            isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar nota',
+            style: const TextStyle(color: Colors.white),
           ),
-          content: const Text(
-            '¿Estás seguro de que deseas eliminar esta nota?',
-            style: TextStyle(color: Colors.white70),
+          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(
@@ -119,9 +122,9 @@ class _NoteEditorScreenState extends State<NoteEditorScreen> {
                 Navigator.of(context).pop();
                 Navigator.of(context).pop('delete');
               },
-              child: const Text(
-                'Eliminar',
-                style: TextStyle(color: Colors.red),
+              child: Text(
+                isDeletedNote ? 'Eliminar permanentemente' : 'Eliminar',
+                style: const TextStyle(color: Colors.red),
               ),
             ),
           ],