feat: add admin page

lib/views/pin_lock_view.dart

@@ -15,8 +15,20 @@ const _pinLength = 4;
 class PinEntryView extends StatefulWidget {
   final PinEntryMode mode;
   final VoidCallback? onSuccess;
+  final bool isAdmin;
+  final Future<bool> Function(String)? onVerify;
+  final Future<bool> Function(String)? onSet;
+  final String? Function()? errorMessage;
 
-  const PinEntryView({super.key, required this.mode, this.onSuccess});
+  const PinEntryView({
+    super.key,
+    required this.mode,
+    this.onSuccess,
+    this.isAdmin = false,
+    this.onVerify,
+    this.onSet,
+    this.errorMessage,
+  });
 
   @override
   State<PinEntryView> createState() => _PinEntryViewState();
@@ -33,12 +45,22 @@ class _PinEntryViewState extends State<PinEntryView> {
   bool get _isCreateFlow => widget.mode == PinEntryMode.create;
 
   String _title(AppLocalizations l10n) {
+    if (widget.isAdmin) {
+      if (!_isCreateFlow) return l10n.enterAdminPin;
+      return _isConfirmStep ? l10n.confirmAdminPin : l10n.createAdminPin;
+    }
+
     if (!_isCreateFlow) return l10n.enterPin;
     return _isConfirmStep ? l10n.confirmPin : l10n.createPin;
   }
 
   String? _subtitle(AppLocalizations l10n) {
     if (!_isCreateFlow) return null;
+
+    if (widget.isAdmin) {
+      return _isConfirmStep ? l10n.confirmPinSubtitle : l10n.adminPinSubtitle;
+    }
+
     return _isConfirmStep ? l10n.confirmPinSubtitle : l10n.enterPinSubtitle;
   }
 
@@ -64,7 +86,6 @@ class _PinEntryViewState extends State<PinEntryView> {
   }
 
   Future<void> _handleComplete() async {
-    final viewModel = context.read<PinLockViewModel>();
     final l10n = AppLocalizations.of(context);
 
     if (_isCreateFlow && !_isConfirmStep) {
@@ -90,7 +111,7 @@ class _PinEntryViewState extends State<PinEntryView> {
       }
 
       setState(() => _isSubmitting = true);
-      final ok = await viewModel.setPin(_digits);
+      final ok = await _setPin(_digits);
       if (!mounted) return;
       setState(() => _isSubmitting = false);
 
@@ -101,24 +122,45 @@ class _PinEntryViewState extends State<PinEntryView> {
           _firstEntry = null;
           _isConfirmStep = false;
         });
-        _fail(l10n.localizedError(viewModel.errorMessage));
+        _fail(l10n.localizedError(_errorMessage()));
       }
       return;
     }
 
     // Unlock flow.
     setState(() => _isSubmitting = true);
-    final ok = await viewModel.verify(_digits);
+    final ok = await _verify(_digits);
     if (!mounted) return;
     setState(() => _isSubmitting = false);
 
     if (ok) {
       widget.onSuccess?.call();
     } else {
-      _fail(l10n.localizedError(viewModel.errorMessage));
+      _fail(l10n.localizedError(_errorMessage()));
     }
   }
 
+  Future<bool> _setPin(String pin) {
+    final callback = widget.onSet;
+    if (callback != null) return callback(pin);
+
+    return context.read<PinLockViewModel>().setPin(pin);
+  }
+
+  Future<bool> _verify(String pin) {
+    final callback = widget.onVerify;
+    if (callback != null) return callback(pin);
+
+    return context.read<PinLockViewModel>().verify(pin);
+  }
+
+  String? _errorMessage() {
+    final callback = widget.errorMessage;
+    if (callback != null) return callback();
+
+    return context.read<PinLockViewModel>().errorMessage;
+  }
+
   void _fail(String message) {
     setState(() {
       _localError = message;