간편 로그인 · 성운/행성 생성을 아래에서 올라오는 전환으로

app/lib/features/galaxy/galaxy_home_screen.dart

@@ -17,6 +17,7 @@ import '../../core/data/backend.dart' show BackendException;
 import '../home/nebula_create_screen.dart';
 import '../planet/planet_detail_screen.dart';
 import '../../core/i18n/app_locale.dart';
+import '../../core/ui/sheet_route.dart';
 
 /// GALAXY 탭 루트 — 시안 `354:220228` Galaxy.
 ///
@@ -116,7 +117,7 @@ class _GalaxyHomeScreenState extends State<GalaxyHomeScreen> {
     }
     final myPop = snapshot.myPop;
     final fandomId = await navigator.push(
-      MaterialPageRoute<String>(
+      SheetRoute<String>(
         builder: (_) =>
             NebulaCreateScreen(repository: widget.home, myPop: myPop),
       ),