fix: pincode functionality

lib/views/pin_lock_view.dart

@@ -242,30 +242,32 @@ class _PinKeypad extends StatelessWidget {
       children: [
         for (final row in _rows)
           Padding(
-            padding: const EdgeInsets.symmetric(vertical: 6),
+            padding: const EdgeInsets.symmetric(vertical: 8),
             child: Row(
-              spacing: 16,
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
-                for (final digit in row)
+                for (final digit in row) ...[
                   _KeypadButton(
                     label: digit,
                     onTap: enabled ? () => onDigit(digit) : null,
                   ),
+                  const SizedBox(width: 20),
+                ],
               ],
             ),
           ),
         Padding(
-          padding: const EdgeInsets.symmetric(vertical: 6),
+          padding: const EdgeInsets.symmetric(vertical: 8),
           child: Row(
-            spacing: 16,
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
               const _KeypadButton(isSpacer: true, onTap: null),
+              const SizedBox(width: 20),
               _KeypadButton(
                 label: '0',
                 onTap: enabled ? () => onDigit('0') : null,
               ),
+              const SizedBox(width: 20),
               _KeypadButton(
                 icon: Icons.backspace_outlined,
                 onTap: enabled ? onBackspace : null,
@@ -294,14 +296,14 @@ class _KeypadButton extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (isSpacer) {
-      return const SizedBox(width: 72, height: 72);
+      return const SizedBox(width: 80, height: 80);
     }
 
     final scheme = Theme.of(context).colorScheme;
 
     return SizedBox(
-      width: 72,
-      height: 72,
+      width: 80,
+      height: 80,
       child: Material(
         color: scheme.onSurface.withValues(alpha: 0.04),
         shape: const CircleBorder(),