fix(flutter): drop redundant const in nested const contexts

Making the outer FabledSwordTheme(...) and HomeData(...) constructors
const made every inner const redundant — Dart's analyzer fires
unnecessary_const for each. Strip the inner consts so the outer
context owns the const inference.

flutter_client/lib/theme/theme_extension.dart

@@ -45,9 +45,9 @@ class FabledSwordTheme extends ThemeExtension<FabledSwordTheme> {
         warning: FabledSwordTokens.warning,
         error: FabledSwordTokens.error,
         info: FabledSwordTokens.info,
-        display: const TextStyle(fontFamily: FabledSwordTokens.fontDisplay),
+        display: TextStyle(fontFamily: FabledSwordTokens.fontDisplay),
-        body: const TextStyle(fontFamily: FabledSwordTokens.fontBody),
+        body: TextStyle(fontFamily: FabledSwordTokens.fontBody),
-        mono: const TextStyle(fontFamily: FabledSwordTokens.fontMono),
+        mono: TextStyle(fontFamily: FabledSwordTokens.fontMono),
       );
 
   @override

flutter_client/test/library/home_screen_test.dart

@@ -12,15 +12,15 @@ import 'package:minstrel/theme/theme_data.dart';
 void main() {
   testWidgets('home renders sections with rows', (tester) async {
     const fixture = HomeData(
-      recentlyAddedAlbums: const [
+      recentlyAddedAlbums: [
         AlbumRef(id: 'a', title: 'Geogaddi', artistId: 'x', artistName: 'BoC'),
       ],
-      rediscoverAlbums: const [],
+      rediscoverAlbums: [],
-      rediscoverArtists: const [
+      rediscoverArtists: [
         ArtistRef(id: 'r', name: 'Aphex Twin'),
       ],
-      mostPlayedTracks: const [],
+      mostPlayedTracks: [],
-      lastPlayedArtists: const [],
+      lastPlayedArtists: [],
     );
     await tester.pumpWidget(ProviderScope(
       overrides: [