feat: add remote products and qr code for payconic

lib/views/pin_lock_view.dart

@@ -20,7 +20,8 @@ class PinEntryView extends StatefulWidget {
   final Future<bool> Function(String)? onVerify;
   final Future<bool> Function(String)? onSet;
   final AppError? Function()? error;
-  final bool showBack;
+  /// Shows a close button that leaves the screen without entering a PIN.
+  final VoidCallback? onClose;
 
   const PinEntryView({
     super.key,
@@ -30,7 +31,7 @@ class PinEntryView extends StatefulWidget {
     this.onVerify,
     this.onSet,
     this.error,
-    this.showBack = false,
+    this.onClose,
   });
 
   @override
@@ -185,18 +186,16 @@ class _PinEntryViewState extends State<PinEntryView> {
           padding: const EdgeInsets.symmetric(horizontal: 24),
           child: Column(
             children: [
-              if (widget.showBack) ...[
-                const Spacer(flex: 1),
-                Row(
-                  children: [
-                    IconButton(
-                      onPressed: () => {},
-                      icon: const Icon(Icons.close),
-                      tooltip: 'Back',
-                    ),
-                  ],
-                ),
-              ],
+              Align(
+                alignment: Alignment.centerLeft,
+                child: widget.onClose != null
+                    ? IconButton(
+                        onPressed: _isSubmitting ? null : widget.onClose,
+                        icon: const Icon(Icons.close),
+                        tooltip: l10n.close,
+                      )
+                    : const SizedBox(height: 48),
+              ),
               const Spacer(flex: 2),
               Icon(Icons.lock_outline_rounded, size: 36, color: scheme.primary),
               const SizedBox(height: 16),