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lib/widgets/loading_view.dart

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+/// Centered spinner used while [ItemController] is fetching data.
+library;
+
+import 'package:flutter/material.dart';
+
+class LoadingView extends StatelessWidget {
+  const LoadingView({super.key, this.message = 'Loading…'});
+
+  final String message;
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          const CircularProgressIndicator(),
+          const SizedBox(height: 16),
+          Text(message, style: Theme.of(context).textTheme.bodyMedium),
+        ],
+      ),
+    );
+  }
+}