간편 로그인 · 성운/행성 생성을 아래에서 올라오는 전환으로

app/lib/features/auth/login_screen.dart

@@ -6,6 +6,7 @@ import '../../core/firebase/firebase_boot.dart';
 import '../../core/i18n/app_locale.dart';
 import '../../core/theme/tokens.dart';
 import '../../core/ui/app_icons.dart';
+import '../../core/ui/sheet_route.dart';
 import 'auth.dart';
 import 'auth_repository.dart';
 import 'signup_screens.dart';
@@ -101,9 +102,9 @@ class _LoginScreenState extends State<LoginScreen> {
 
   void _open({required bool signUp}) {
     Navigator.of(context).push(
-      MaterialPageRoute<void>(
-        // 명세 `510:86374` 「닫기 — 아래 방향 Move Out 으로 이전 화면」 — 아래에서 올라오는 전체 화면.
-        fullscreenDialog: true,
+      // 명세 `510:86374` 「닫기 — 아래 방향 Move Out 으로 이전 화면」 — 아래에서 올라오는 전체 화면.
+      // fullscreenDialog 만으로는 Android 에서 페이드 · 확대로 열렸다(10/6 실기기 E-5).
+      SheetRoute<void>(
         builder: (_) => SimpleLoginScreen(auth: widget.auth, signUp: signUp),
       ),
     );
@@ -248,8 +249,7 @@ class _SimpleLoginScreenState extends State<SimpleLoginScreen> {
 
   void _switchMode() {
     Navigator.of(context).pushReplacement(
-      MaterialPageRoute<void>(
-        fullscreenDialog: true,
+      SheetRoute<void>(
         builder: (_) =>
             SimpleLoginScreen(auth: widget.auth, signUp: !widget.signUp),
       ),

app/lib/features/auth/onboarding_screens.dart

@@ -5,6 +5,7 @@ import '../../core/i18n/app_locale.dart';
 import '../../core/push/push_messaging.dart';
 import '../../core/theme/tokens.dart';
 import '../../core/ui/app_icons.dart';
+import '../../core/ui/sheet_route.dart';
 import '../home/coach_mark.dart';
 import '../home/home_data.dart';
 import '../home/nebula_create_screen.dart';
@@ -259,7 +260,7 @@ class _OnboardingFlowState extends State<OnboardingFlow> {
         }),
         onCreateNebula: () async {
           final created = await Navigator.of(context).push<String>(
-            MaterialPageRoute(
+            SheetRoute(
               builder: (_) => NebulaCreateScreen(repository: widget.home),
             ),
           );

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),
       ),

app/lib/features/home/growth_complete_screen.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import '../../core/ui/sheet_route.dart';
+
 import 'home_data.dart';
 import 'home_screen.dart' show HomeHeader;
 import 'planet_create_screen.dart';
@@ -65,7 +67,7 @@ class GrowthCompleteScreen extends StatelessWidget {
               growth: growth,
               fandomId: nebulaName,
               onBirth: () => Navigator.of(context).push(
-                MaterialPageRoute<void>(
+                SheetRoute<void>(
                   builder: (_) => PlanetCreateScreen(nebulaName: nebulaName),
                 ),
               ),

app/lib/features/home/home_screen.dart

@@ -16,7 +16,7 @@ import 'package:go_router/go_router.dart';
 import '../../core/format.dart';
 import '../../core/i18n/app_locale.dart';
 import '../../core/theme/tokens.dart';
-import '../../core/ui/app_dialog.dart' show slideUpRoute;
+import '../../core/ui/sheet_route.dart';
 import '../../core/ui/app_icons.dart';
 import '../../core/data/planet_visual_state.dart';
 import '../../core/ui/live_stream.dart';
@@ -168,7 +168,7 @@ class _HomeScreenState extends State<HomeScreen> with WidgetsBindingObserver {
     final created = await Navigator.of(
       context,
       rootNavigator: true,
-    ).push(slideUpRoute<String>((_) => screen));
+    ).push(SheetRoute<String>(builder: (_) => screen));
     if (created == null || !mounted) return;
     if (widget.galaxyRepository case final repository?) {
       setState(() {