neon: cleanup changing of NextcloudTheme

Signed-off-by: Nikolas Rimikis <rimikis.nikolas@gmail.com>

packages/neon/neon/lib/src/app.dart

@@ -28,14 +28,8 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
   late final _routerDelegate = AppRouter(
     navigatorKey: _navigatorKey,
     accountsBloc: _accountsBloc,
-    onThemeChanged: (final nextcloudTheme) {
-      setState(() {
-        _nextcloudTheme = nextcloudTheme;
-      });
-    },
   );
 
-  NextcloudCoreServerCapabilities_Ocs_Data_Capabilities_Theming? _nextcloudTheme;
   Rect? _lastBounds;
 
   @override
@@ -271,22 +265,25 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
                 }
 
                 FlutterNativeSplash.remove();
-                return MaterialApp.router(
+                return ValueListenableBuilder(
+                  valueListenable: themeNotifier,
+                  builder: (final context, final nextcloudTheme, final child) => MaterialApp.router(
                     localizationsDelegates: AppLocalizations.localizationsDelegates,
                     supportedLocales: AppLocalizations.supportedLocales,
                     themeMode: themeMode,
                     theme: getThemeFromNextcloudTheme(
-                    _nextcloudTheme,
+                      nextcloudTheme,
                       Brightness.light,
-                    keepOriginalAccentColor: _nextcloudTheme == null || (themeKeepOriginalAccentColor ?? false),
+                      keepOriginalAccentColor: nextcloudTheme == null || (themeKeepOriginalAccentColor ?? false),
                     ),
                     darkTheme: getThemeFromNextcloudTheme(
-                    _nextcloudTheme,
+                      nextcloudTheme,
                       Brightness.dark,
+                      keepOriginalAccentColor: nextcloudTheme == null || (themeKeepOriginalAccentColor ?? false),
                       oledAsDark: themeOLEDAsDark,
-                    keepOriginalAccentColor: _nextcloudTheme == null || (themeKeepOriginalAccentColor ?? false),
                     ),
                     routerDelegate: _routerDelegate,
+                  ),
                 );
               },
             ),

packages/neon/neon/lib/src/blocs/capabilities.dart

@@ -14,6 +14,10 @@ class CapabilitiesBloc extends InteractiveBloc implements CapabilitiesBlocEvents
     this._requestManager,
     this._client,
   ) {
+    capabilities.listen((final value) {
+      themeNotifier.value = value.data!.capabilities.theming;
+    });
+
     unawaited(refresh());
   }
 

packages/neon/neon/lib/src/pages/home.dart

@@ -5,12 +5,10 @@ const kQuickBarWidth = kAvatarSize + 20;
 class HomePage extends StatefulWidget {
   const HomePage({
     required this.account,
-    required this.onThemeChanged,
     super.key,
   });
 
   final Account account;
-  final Function(NextcloudTheme? theme) onThemeChanged;
 
   @override
   State<HomePage> createState() => _HomePageState();
@@ -48,8 +46,6 @@ class _HomePageState extends State<HomePage> {
 
     _capabilitiesBloc.capabilities.listen((final result) async {
       if (result.data != null) {
-        widget.onThemeChanged(result.data!.capabilities.theming);
-
         // ignore cached version and prevent duplicate dialogs
         if (result.cached) {
           return;

packages/neon/neon/lib/src/router.dart

@@ -5,11 +5,9 @@ class AppRouter extends RouterDelegate<Account> with ChangeNotifier, PopNavigato
   AppRouter({
     required this.navigatorKey,
     required this.accountsBloc,
-    required this.onThemeChanged,
   });
 
   final AccountsBloc accountsBloc;
-  final Function(NextcloudTheme? theme) onThemeChanged;
   final _globalPopups = const GlobalPopups();
 
   @override
@@ -41,7 +39,6 @@ class AppRouter extends RouterDelegate<Account> with ChangeNotifier, PopNavigato
                     HomePage(
                       key: Key(currentConfiguration!.id),
                       account: currentConfiguration!,
-                      onThemeChanged: onThemeChanged,
                     ),
                   ],
                 ),

packages/neon/neon/lib/src/utils/theme.dart

@@ -1,5 +1,7 @@
 part of '../../neon.dart';
 
+final themeNotifier = ValueNotifier<NextcloudCoreServerCapabilities_Ocs_Data_Capabilities_Theming?>(null);
+
 const themePrimaryColor = Color(0xFFF37736);
 
 ThemeData getThemeFromNextcloudTheme(