first implementation finished

app/lib/features/share_intent/domain/entities/shared_content.dart

@@ -0,0 +1,31 @@
+import 'package:kagi_bang_bang/utils/uri_parser.dart' as uri_parser;
+
+sealed class SharedContent {
+  const SharedContent();
+
+  factory SharedContent.parse(String content) {
+    if (uri_parser.tryParseUrl(content) case final Uri uri) {
+      return SharedUrl(uri);
+    } else {
+      return SharedText(content);
+    }
+  }
+}
+
+final class SharedUrl extends SharedContent {
+  final Uri url;
+
+  const SharedUrl(this.url);
+
+  @override
+  String toString() => url.toString();
+}
+
+final class SharedText extends SharedContent {
+  final String text;
+
+  const SharedText(this.text);
+
+  @override
+  String toString() => text;
+}