test(flutter/home): cover new home parity layout

Expands the existing single test into four cases:
- 4 placeholder cards in Playlists row when no system playlists exist
- Empty-state copy for each section verbatim against the strings
  in HomeScreen
- Real For-You card renders with the system badge when present
- Existing rollups (Recently added / Rediscover) still render correctly
  alongside the new providers

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

flutter_client/test/library/home_screen_test.dart

@@ -2,16 +2,110 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 
+import 'package:minstrel/api/endpoints/playlists.dart';
 import 'package:minstrel/library/home_screen.dart';
 import 'package:minstrel/library/library_providers.dart';
 import 'package:minstrel/models/album.dart';
 import 'package:minstrel/models/artist.dart';
 import 'package:minstrel/models/home_data.dart';
+import 'package:minstrel/models/playlist.dart';
+import 'package:minstrel/models/system_playlists_status.dart';
+import 'package:minstrel/playlists/playlists_provider.dart';
 import 'package:minstrel/theme/theme_data.dart';
 
+const _emptyHome = HomeData(
+  recentlyAddedAlbums: [],
+  rediscoverAlbums: [],
+  rediscoverArtists: [],
+  mostPlayedTracks: [],
+  lastPlayedArtists: [],
+);
+
 void main() {
-  testWidgets('home renders sections with rows', (tester) async {
-    const fixture = HomeData(
+  testWidgets('renders 4 placeholder cards in Playlists row when no system playlists exist',
+      (tester) async {
+    await tester.pumpWidget(ProviderScope(
+      overrides: [
+        homeProvider.overrideWith((ref) async => _emptyHome),
+        playlistsListProvider('all').overrideWith(
+          (ref) async => PlaylistsList.empty(),
+        ),
+        systemPlaylistsStatusProvider.overrideWith(
+          (ref) async => SystemPlaylistsStatus.empty(),
+        ),
+      ],
+      child: MaterialApp(theme: buildThemeData(), home: const HomeScreen()),
+    ));
+    await tester.pumpAndSettle();
+    // For-You placeholder + 3 Songs-like placeholders.
+    expect(find.text('For You'), findsOneWidget);
+    expect(find.text('Songs like…'), findsNWidgets(3));
+  });
+
+  testWidgets('renders empty-state copy for each section when home payload is empty',
+      (tester) async {
+    await tester.pumpWidget(ProviderScope(
+      overrides: [
+        homeProvider.overrideWith((ref) async => _emptyHome),
+        playlistsListProvider('all').overrideWith(
+          (ref) async => PlaylistsList.empty(),
+        ),
+        systemPlaylistsStatusProvider.overrideWith(
+          (ref) async => SystemPlaylistsStatus.empty(),
+        ),
+      ],
+      child: MaterialApp(theme: buildThemeData(), home: const HomeScreen()),
+    ));
+    await tester.pumpAndSettle();
+    expect(
+      find.text("Nothing added yet. Scan a folder via the server's config."),
+      findsOneWidget,
+    );
+    expect(
+      find.text('No forgotten favourites yet. Like some albums or artists to fill this in.'),
+      findsOneWidget,
+    );
+    expect(find.text('No plays to draw from. Listen to something.'),
+        findsOneWidget);
+    expect(find.text('No recent plays.'), findsOneWidget);
+  });
+
+  testWidgets('renders For-You card when system playlist exists',
+      (tester) async {
+    const forYou = Playlist(
+      id: 'fy',
+      userId: 'u1',
+      name: 'For You',
+      description: '',
+      isPublic: false,
+      systemVariant: 'for_you',
+      trackCount: 75,
+      coverUrl: '',
+      ownerUsername: 'alice',
+      createdAt: '2026-05-01T00:00:00Z',
+      updatedAt: '2026-05-01T00:00:00Z',
+    );
+    await tester.pumpWidget(ProviderScope(
+      overrides: [
+        homeProvider.overrideWith((ref) async => _emptyHome),
+        playlistsListProvider('all').overrideWith(
+          (ref) async =>
+              const PlaylistsList(owned: [forYou], public: []),
+        ),
+        systemPlaylistsStatusProvider.overrideWith(
+          (ref) async => SystemPlaylistsStatus.empty(),
+        ),
+      ],
+      child: MaterialApp(theme: buildThemeData(), home: const HomeScreen()),
+    ));
+    await tester.pumpAndSettle();
+    // The real card carries the playlist name + the "for you" badge.
+    expect(find.text('For You'), findsOneWidget);
+    expect(find.text('for you'), findsOneWidget);
+  });
+
+  testWidgets('renders home rollups when payload is non-empty', (tester) async {
+    const home = HomeData(
       recentlyAddedAlbums: [
         AlbumRef(id: 'a', title: 'Geogaddi', artistId: 'x', artistName: 'BoC'),
       ],
@@ -24,13 +118,20 @@ void main() {
     );
     await tester.pumpWidget(ProviderScope(
       overrides: [
-        homeProvider.overrideWith((ref) async => fixture),
+        homeProvider.overrideWith((ref) async => home),
+        playlistsListProvider('all').overrideWith(
+          (ref) async => PlaylistsList.empty(),
+        ),
+        systemPlaylistsStatusProvider.overrideWith(
+          (ref) async => SystemPlaylistsStatus.empty(),
+        ),
       ],
       child: MaterialApp(theme: buildThemeData(), home: const HomeScreen()),
     ));
     await tester.pumpAndSettle();
     expect(find.text('Recently added'), findsOneWidget);
     expect(find.text('Geogaddi'), findsOneWidget);
+    expect(find.text('Rediscover'), findsOneWidget);
     expect(find.text('Aphex Twin'), findsOneWidget);
   });
 }