Merge branch 'main' of https://gitea.weltonmoura.com.br/welton/tatuchat

- TatuPalette.scheme aceita softenPrimary e passa a usar a seed como primary, onPrimary por contraste e surfaceTint, em vez da paleta tonal do Material 3
- nova opcao AppSettings.softenThemeColor (default false, ou seja cor exacta)
- interruptor 'Suavizar cor do tema' em Configuracoes > Aparencia, com l10n en/pt
- a opcao e sincronizada via account data (soften_theme_color) e mantida localmente como fallback, tal como a cor do tema
- setApplicationAccountColor e updateApplicationAccountConfig preservam o novo campo
- um unico sync de account data actualiza cor e opcao
- testes de serializacao e round-trip para o novo campo

lib/config/setting_keys.dart

@@ -59,6 +59,11 @@ enum AppSettings<T> {
   ),
   // colorSchemeSeed stored as ARGB int
   colorSchemeSeedInt<int>('chat.fluffy.color_scheme_seed', 0xFF00D084),
+
+  /// When false the chosen seed color is used verbatim as the theme primary
+  /// color. When true the Material 3 tonal palette is used instead, which
+  /// softens it.
+  softenThemeColor<bool>('chat.fluffy.soften_theme_color', false),
   emojiSuggestionLocale<String>('emoji_suggestion_locale', ''),
   enableSoftLogout<bool>('chat.fluffy.enable_soft_logout', true),
   enableMatrixNativeOIDC<bool>('chat.fluffy.enable_matrix_native_oidc', true),

lib/config/tatu_palette.dart

@@ -97,7 +97,14 @@ abstract class TatuPalette {
   /// When a [seed] is provided (e.g. a color chosen by the user or a system
   /// dynamic color), its tonal values are used for the primary family while
   /// the brand surfaces, accent and error colors are preserved.
-  static ColorScheme scheme(Brightness brightness, [Color? seed]) {
+  ///
+  /// Unless [softenPrimary] is set, the seed is used verbatim as the primary
+  /// color, because the Material 3 tonal palette noticeably dulls it down.
+  static ColorScheme scheme(
+    Brightness brightness, [
+    Color? seed,
+    bool softenPrimary = false,
+  ]) {
     final isDark = brightness == Brightness.dark;
     final p = isDark ? _dark : _light;
     final base = ColorScheme.fromSeed(
@@ -106,12 +113,17 @@ abstract class TatuPalette {
       dynamicSchemeVariant: DynamicSchemeVariant.rainbow,
     );
     final useBrandPrimary = seed == null;
+    // Only force the exact color when the caller did not ask for the soft
+    // Material 3 palette. `null` here means "keep the value from [base]".
+    final exactPrimary = !useBrandPrimary && !softenPrimary ? seed : null;
     return base.copyWith(
-      primary: useBrandPrimary ? p.primary : null,
-      onPrimary: useBrandPrimary ? p.onPrimary : null,
+      primary: useBrandPrimary ? p.primary : exactPrimary,
+      onPrimary: useBrandPrimary
+          ? p.onPrimary
+          : (exactPrimary == null ? null : _contrastOn(exactPrimary)),
       primaryContainer: useBrandPrimary ? p.primaryContainer : null,
       onPrimaryContainer: useBrandPrimary ? p.onPrimaryContainer : null,
-      surfaceTint: useBrandPrimary ? p.primary : null,
+      surfaceTint: useBrandPrimary ? p.primary : exactPrimary,
       secondary: p.secondary,
       onSecondary: p.onSecondary,
       secondaryContainer: p.secondaryContainer,
@@ -141,6 +153,12 @@ abstract class TatuPalette {
       surfaceBright: p.surfaceBright,
     );
   }
+
+  /// Picks the readable foreground for an arbitrary background color.
+  static Color _contrastOn(Color background) =>
+      ThemeData.estimateBrightnessForColor(background) == Brightness.dark
+      ? Colors.white
+      : Colors.black;
 }
 
 class _Scheme {
@@ -209,4 +227,4 @@ class _Scheme {
   final Color surfaceHighest;
   final Color surfaceDim;
   final Color surfaceBright;
-}
+}

lib/config/themes.dart

@@ -47,8 +47,9 @@ abstract class FluffyThemes {
     BuildContext context,
     Brightness brightness, [
     Color? seed,
+    bool softenPrimary = false,
   ]) {
-    final colorScheme = TatuPalette.scheme(brightness, seed);
+    final colorScheme = TatuPalette.scheme(brightness, seed, softenPrimary);
     final isColumnMode = FluffyThemes.isColumnMode(context);
     final dividerColor = brightness == Brightness.dark
         ? colorScheme.surfaceContainerHighest

lib/l10n/intl_en.arb

@@ -3029,5 +3029,15 @@
   "@uninstallAppConfirm": {
     "type": "String",
     "placeholders": {}
+  },
+  "softenThemeColor": "Soften theme color",
+  "@softenThemeColor": {
+    "type": "String",
+    "placeholders": {}
+  },
+  "softenThemeColorSubtitle": "Use a soft Material 3 palette derived from the selected color instead of the exact color.",
+  "@softenThemeColorSubtitle": {
+    "type": "String",
+    "placeholders": {}
   }
 }

lib/l10n/intl_pt.arb

@@ -2043,5 +2043,7 @@
     "type": "String",
     "placeholders": {}
   },
-  "areYouSureDeletePost": "Eliminar"
+  "areYouSureDeletePost": "Eliminar",
+  "softenThemeColor": "Suavizar cor do tema",
+  "softenThemeColorSubtitle": "Usa uma paleta suave do Material 3 derivada da cor escolhida em vez da cor exata."
 }

lib/pages/chat_list/chat_list.dart

@@ -525,7 +525,7 @@ class ChatListController extends State<ChatList>
         )
         .toList();
 
-    var action = await showModalActionPopup<ChatContextAction>(
+    final action = await showModalActionPopup<ChatContextAction>(
       context: posContext,
       cancelLabel: l10n.cancel,
       actions: [
@@ -564,36 +564,6 @@ class ChatListController extends State<ChatList>
                 room.isFavourite ? Icons.push_pin : Icons.push_pin_outlined,
               ),
             ),
-        ],
-        AdaptiveModalAction(
-          value: ChatContextAction.leave,
-          label: room.membership == Membership.invite
-              ? l10n.delete
-              : l10n.leave,
-          icon: const Icon(Icons.delete_outlined),
-          isDestructive: true,
-        ),
-        if (room.membership == Membership.invite)
-          AdaptiveModalAction(
-            value: ChatContextAction.block,
-            label: l10n.block,
-            icon: const Icon(Icons.block_outlined),
-            isDestructive: true,
-          ),
-        if (room.membership == Membership.join)
-          AdaptiveModalAction(
-            value: ChatContextAction.showMore,
-            label: l10n.more,
-            icon: Icon(Icons.adaptive.more_outlined),
-          ),
-      ],
-    );
-    if (!posContext.mounted || !mounted) return;
-    if (action == ChatContextAction.showMore) {
-      action = await showModalActionPopup<ChatContextAction>(
-        context: posContext,
-        cancelLabel: l10n.cancel,
-        actions: [
           if (!room.isFavourite)
             AdaptiveModalAction(
               value: ChatContextAction.lowPriority,
@@ -625,8 +595,24 @@ class ChatListController extends State<ChatList>
               icon: const Icon(Icons.group_work_outlined),
             ),
         ],
-      );
-    }
+        AdaptiveModalAction(
+          value: ChatContextAction.leave,
+          label: room.membership == Membership.invite
+              ? l10n.delete
+              : l10n.leave,
+          icon: const Icon(Icons.delete_outlined),
+          isDestructive: true,
+        ),
+        if (room.membership == Membership.invite)
+          AdaptiveModalAction(
+            value: ChatContextAction.block,
+            label: l10n.block,
+            icon: const Icon(Icons.block_outlined),
+            isDestructive: true,
+          ),
+      ],
+    );
+    if (!posContext.mounted || !mounted) return;
 
     if (action == null) return;
     if (!mounted) return;
@@ -753,8 +739,6 @@ class ChatListController extends State<ChatList>
           future: () => room.removeTag(activeTag!),
         );
         return;
-      case ChatContextAction.showMore:
-        throw ('Should not be handled!');
     }
   }
 
@@ -1021,5 +1005,4 @@ enum ChatContextAction {
   leave,
   addToSpace,
   block,
-  showMore,
 }

lib/pages/image_viewer/image_viewer.dart

@@ -33,6 +33,57 @@ class ImageViewer extends StatefulWidget {
 class ImageViewerController extends State<ImageViewer> {
   final FocusNode focusNode = FocusNode();
 
+  /// One [TransformationController] per image, so the zoom of one page never
+  /// leaks into its neighbours.
+  final Map<String, TransformationController> _transformations = {};
+
+  int _pointerCount = 0;
+  bool _isZoomed = false;
+
+  /// True while an image is zoomed in, so panning moves the image instead of
+  /// switching to the next one.
+  bool get isZoomed => _isZoomed;
+
+  /// The [PageView] must not compete for the gesture while pinching or while
+  /// an image is zoomed, otherwise the swipe recognizer wins the gesture arena
+  /// and pinch-to-zoom never happens.
+  bool get canSwipeToNextImage => _pointerCount < 2 && !_isZoomed;
+
+  TransformationController transformationControllerFor(Event event) =>
+      _transformations.putIfAbsent(event.eventId, () {
+        final controller = TransformationController();
+        controller.addListener(_onTransformChanged);
+        return controller;
+      });
+
+  void onPointerDown() {
+    if (!mounted) return;
+    setState(() => _pointerCount++);
+  }
+
+  void onPointerUp() {
+    if (!mounted || _pointerCount == 0) return;
+    setState(() => _pointerCount--);
+  }
+
+  void _onTransformChanged() {
+    if (!mounted) return;
+    final zoomed = _transformations.values.any(
+      (controller) => controller.value.getMaxScaleOnAxis() > 1.01,
+    );
+    if (zoomed == _isZoomed) return;
+    setState(() => _isZoomed = zoomed);
+  }
+
+  /// Resets the zoom of every image, e.g. after moving to another one.
+  void resetZooms() {
+    for (final controller in _transformations.values) {
+      if (!controller.value.isIdentity()) {
+        controller.value = Matrix4.identity();
+      }
+    }
+  }
+
   @override
   void initState() {
     super.initState();
@@ -72,6 +123,8 @@ class ImageViewerController extends State<ImageViewer> {
   }
 
   Future<void> prevImage() async {
+    if (!canGoBack) return;
+    resetZooms();
     await pageController.previousPage(
       duration: FluffyThemes.animationDuration,
       curve: FluffyThemes.animationCurve,
@@ -81,6 +134,8 @@ class ImageViewerController extends State<ImageViewer> {
   }
 
   Future<void> nextImage() async {
+    if (!canGoNext) return;
+    resetZooms();
     await pageController.nextPage(
       duration: FluffyThemes.animationDuration,
       curve: FluffyThemes.animationCurve,
@@ -112,23 +167,47 @@ class ImageViewerController extends State<ImageViewer> {
 
   static const maxScaleFactor = 1.5;
 
+  /// Closes the viewer.
+  ///
+  /// Always targets the root navigator, because the viewer is opened with
+  /// `showDialog` on the root navigator while the chat room lives in a nested
+  /// navigator of the go_router shell. Using a relative navigator here would
+  /// either pop nothing or pop the wrong route.
+  void closeAction() => Navigator.of(context, rootNavigator: true).pop();
+
   /// Go back if user swiped it away
   void onInteractionEnds(ScaleEndDetails endDetails) {
     if (PlatformInfos.usesTouchscreen == false) {
+      if (isZoomed) return;
       if (endDetails.velocity.pixelsPerSecond.dy >
           MediaQuery.sizeOf(context).height * maxScaleFactor) {
-        Navigator.of(context, rootNavigator: false).pop();
+        closeAction();
       }
     }
   }
 
   @override
   void dispose() {
+    for (final controller in _transformations.values) {
+      controller.removeListener(_onTransformChanged);
+      controller.dispose();
+    }
+    _transformations.clear();
     focusNode.dispose();
     pageController.dispose();
     super.dispose();
   }
 
   @override
-  Widget build(BuildContext context) => ImageViewerView(this);
+  Widget build(BuildContext context) => PopScope<Object?>(
+    // Claim the system back button (and predictive back gesture) for the
+    // viewer. Without this, the request can reach go_router instead, which
+    // pops the chat room out of the shell and leaves the image on screen.
+    canPop: false,
+    onPopInvokedWithResult: (didPop, _) {
+      if (didPop) return;
+      closeAction();
+    },
+    child: ImageViewerView(this),
+  );
 }

lib/pages/image_viewer/image_viewer_view.dart

@@ -25,7 +25,7 @@ class ImageViewerView extends StatelessWidget {
       foregroundColor: Colors.white,
     );
     return GestureDetector(
-      onTap: () => Navigator.of(context).pop(),
+      onTap: controller.closeAction,
       child: Scaffold(
         backgroundColor: Colors.black.withAlpha(128),
         extendBodyBehindAppBar: true,
@@ -34,7 +34,7 @@ class ImageViewerView extends StatelessWidget {
           leading: IconButton(
             style: iconButtonStyle,
             icon: const Icon(Icons.close),
-            onPressed: Navigator.of(context).pop,
+            onPressed: controller.closeAction,
             color: Colors.white,
             tooltip: L10n.of(context).close,
           ),
@@ -78,50 +78,60 @@ class ImageViewerView extends StatelessWidget {
               KeyboardListener(
                 focusNode: controller.focusNode,
                 onKeyEvent: controller.onKeyEvent,
-                child: PageView.builder(
-                  scrollDirection: Axis.vertical,
-                  controller: controller.pageController,
-                  itemCount: controller.allEvents.length,
-                  itemBuilder: (context, i) {
-                    final event = controller.allEvents[i];
-                    switch (event.messageType) {
-                      case MessageTypes.Video:
-                        return Padding(
-                          padding: const EdgeInsets.only(top: 52.0),
-                          child: Center(
-                            child: GestureDetector(
-                              // Ignore taps to not go back here:
-                              onTap: () {},
-                              child: EventVideoPlayer(event),
-                            ),
-                          ),
-                        );
-                      case MessageTypes.Image:
-                      case MessageTypes.Sticker:
-                      default:
-                        return InteractiveViewer(
-                          minScale: 1.0,
-                          maxScale: 10.0,
-                          onInteractionEnd: controller.onInteractionEnds,
-                          child: Center(
-                            child: Hero(
-                              tag: event.eventId,
+                child: Listener(
+                  onPointerDown: (_) => controller.onPointerDown(),
+                  onPointerUp: (_) => controller.onPointerUp(),
+                  onPointerCancel: (_) => controller.onPointerUp(),
+                  child: PageView.builder(
+                    scrollDirection: Axis.vertical,
+                    controller: controller.pageController,
+                    physics: controller.canSwipeToNextImage
+                        ? const PageScrollPhysics()
+                        : const NeverScrollableScrollPhysics(),
+                    itemCount: controller.allEvents.length,
+                    itemBuilder: (context, i) {
+                      final event = controller.allEvents[i];
+                      switch (event.messageType) {
+                        case MessageTypes.Video:
+                          return Padding(
+                            padding: const EdgeInsets.only(top: 52.0),
+                            child: Center(
                               child: GestureDetector(
                                 // Ignore taps to not go back here:
                                 onTap: () {},
-                                child: MxcImage(
-                                  key: ValueKey(event.eventId),
-                                  event: event,
-                                  fit: BoxFit.contain,
-                                  isThumbnail: false,
-                                  animated: true,
+                                child: EventVideoPlayer(event),
+                              ),
+                            ),
+                          );
+                        case MessageTypes.Image:
+                        case MessageTypes.Sticker:
+                        default:
+                          return InteractiveViewer(
+                            transformationController: controller
+                                .transformationControllerFor(event),
+                            minScale: 1.0,
+                            maxScale: 10.0,
+                            onInteractionEnd: controller.onInteractionEnds,
+                            child: Center(
+                              child: Hero(
+                                tag: event.eventId,
+                                child: GestureDetector(
+                                  // Ignore taps to not go back here:
+                                  onTap: () {},
+                                  child: MxcImage(
+                                    key: ValueKey(event.eventId),
+                                    event: event,
+                                    fit: BoxFit.contain,
+                                    isThumbnail: false,
+                                    animated: true,
+                                  ),
                                 ),
                               ),
                             ),
-                          ),
-                        );
-                    }
-                  },
+                          );
+                      }
+                    },
+                  ),
                 ),
               ),
               if (hovered)

lib/pages/settings_style/settings_style.dart

@@ -10,6 +10,7 @@ import 'package:tatchat/utils/file_selector.dart';
 import 'package:tatchat/widgets/future_loading_dialog.dart';
 import 'package:tatchat/widgets/theme_builder.dart';
 import 'package:material_ui/material_ui.dart';
+import 'package:matrix/matrix.dart';
 
 import '../../widgets/matrix.dart';
 import 'settings_style_view.dart';
@@ -22,11 +23,18 @@ class SettingsStyle extends StatefulWidget {
 }
 
 class SettingsStyleController extends State<SettingsStyle> {
-  void setChatColor(Color? color) {
+  Future<void> setChatColor(Color? color) async {
+    final client = Matrix.of(context).client;
+    final themeController = ThemeController.of(context);
     AppSettings.colorSchemeSeedInt.setItem(
       color?.toARGB32() ?? AppSettings.colorSchemeSeedInt.defaultValue,
     );
-    ThemeController.of(context).setPrimaryColor(color);
+    await themeController.setPrimaryColor(color);
+    try {
+      await client.setApplicationAccountColor(color?.toARGB32());
+    } catch (e, s) {
+      Logs().e('Unable to save chat color', e, s);
+    }
   }
 
   Future<void> setWallpaper() async {
@@ -105,16 +113,30 @@ class SettingsStyleController extends State<SettingsStyle> {
     });
   }
 
-  void deleteChatWallpaper() => showFutureLoadingDialog(
-    context: context,
-    future: () => Matrix.of(context).client.setApplicationAccountConfig(
-      const ApplicationAccountConfig(wallpaperUrl: null, wallpaperBlur: null),
-    ),
-  );
+  void deleteChatWallpaper() {
+    final client = Matrix.of(context).client;
+    showFutureLoadingDialog(
+      context: context,
+      future: () => client.setApplicationAccountConfig(
+        ApplicationAccountConfig(
+          wallpaperUrl: null,
+          wallpaperBlur: null,
+          primaryColor: client.applicationAccountConfig.primaryColor,
+        ),
+      ),
+    );
+  }
 
   ThemeMode get currentTheme => ThemeController.of(context).themeMode;
   Color? get currentColor => ThemeController.of(context).primaryColor;
 
+  bool get softenThemeColor => ThemeController.of(context).softenPrimaryColor;
+
+  Future<void> setSoftenThemeColor(bool soften) async {
+    await ThemeController.of(context).setSoftenPrimaryColor(soften);
+    setState(() {});
+  }
+
   void switchTheme(ThemeMode? newTheme) {
     if (newTheme == null) return;
     switch (newTheme) {

lib/pages/settings_style/settings_style_view.dart

@@ -136,6 +136,13 @@ class SettingsStyleView extends StatelessWidget {
                 );
               },
             ),
+            SwitchListTile(
+              secondary: const Icon(Icons.palette_outlined),
+              title: Text(L10n.of(context).softenThemeColor),
+              subtitle: Text(L10n.of(context).softenThemeColorSubtitle),
+              value: controller.softenThemeColor,
+              onChanged: controller.setSoftenThemeColor,
+            ),
             Divider(color: theme.dividerColor),
             ListTile(
               title: Text(
@@ -176,24 +183,38 @@ class SettingsStyleView extends StatelessWidget {
                         child: Stack(
                           alignment: Alignment.center,
                           children: [
-                            if (accountConfig.wallpaperUrl != null)
-                              Opacity(
-                                opacity: controller.wallpaperOpacity,
-                                child: ImageFiltered(
-                                  imageFilter: ImageFilter.blur(
-                                    sigmaX: controller.wallpaperBlur,
-                                    sigmaY: controller.wallpaperBlur,
-                                  ),
-                                  child: MxcImage(
-                                    key: ValueKey(accountConfig.wallpaperUrl),
-                                    uri: accountConfig.wallpaperUrl,
-                                    fit: BoxFit.cover,
-                                    isThumbnail: true,
-                                    width: FluffyThemes.columnWidth * 2,
-                                    height: 212,
-                                  ),
+                            Opacity(
+                              opacity: accountConfig.wallpaperUrl != null
+                                  ? controller.wallpaperOpacity
+                                  : 0.3,
+                              child: ImageFiltered(
+                                imageFilter: ImageFilter.blur(
+                                  sigmaX: accountConfig.wallpaperUrl != null
+                                      ? controller.wallpaperBlur
+                                      : 0.0,
+                                  sigmaY: accountConfig.wallpaperUrl != null
+                                      ? controller.wallpaperBlur
+                                      : 0.0,
                                 ),
+                                child: accountConfig.wallpaperUrl != null
+                                    ? MxcImage(
+                                        key: ValueKey(
+                                          accountConfig.wallpaperUrl,
+                                        ),
+                                        uri: accountConfig.wallpaperUrl,
+                                        fit: BoxFit.cover,
+                                        isThumbnail: true,
+                                        width: FluffyThemes.columnWidth * 2,
+                                        height: 212,
+                                      )
+                                    : Image.asset(
+                                        'assets/logo/background.png',
+                                        fit: BoxFit.cover,
+                                        width: FluffyThemes.columnWidth * 2,
+                                        height: 212,
+                                      ),
                               ),
+                            ),
                             Column(
                               mainAxisSize: .min,
                               children: [
@@ -213,12 +234,10 @@ class SettingsStyleView extends StatelessWidget {
                                   ),
                                 ),
                                 Padding(
-                                  padding: EdgeInsets.only(
+                                  padding: const EdgeInsets.only(
                                     left: 12 + 12 + Avatar.defaultSize,
                                     right: 12,
-                                    top: accountConfig.wallpaperUrl == null
-                                        ? 0
-                                        : 12,
+                                    top: 12,
                                     bottom: 12,
                                   ),
                                   child: DecoratedBox(
@@ -246,12 +265,10 @@ class SettingsStyleView extends StatelessWidget {
                                 Align(
                                   alignment: Alignment.centerLeft,
                                   child: Padding(
-                                    padding: EdgeInsets.only(
+                                    padding: const EdgeInsets.only(
                                       right: 12,
                                       left: 12,
-                                      top: accountConfig.wallpaperUrl == null
-                                          ? 0
-                                          : 12,
+                                      top: 12,
                                       bottom: 12,
                                     ),
                                     child: Material(

lib/utils/account_config.dart

@@ -27,20 +27,53 @@ extension ApplicationAccountConfigExtension on Client {
         wallpaperOpacity:
             config.wallpaperOpacity ?? currentConfig.wallpaperOpacity,
         wallpaperBlur: config.wallpaperBlur ?? currentConfig.wallpaperBlur,
+        primaryColor: config.primaryColor ?? currentConfig.primaryColor,
+        softenThemeColor:
+            config.softenThemeColor ?? currentConfig.softenThemeColor,
       ).toJson(),
     );
   }
+
+  Future<void> setApplicationAccountColor(int? primaryColor) {
+    final currentConfig = applicationAccountConfig;
+    return setApplicationAccountConfig(
+      ApplicationAccountConfig(
+        wallpaperUrl: currentConfig.wallpaperUrl,
+        wallpaperOpacity: currentConfig.wallpaperOpacity,
+        wallpaperBlur: currentConfig.wallpaperBlur,
+        primaryColor: primaryColor,
+        softenThemeColor: currentConfig.softenThemeColor,
+      ),
+    );
+  }
+
+  Future<void> setApplicationAccountSoftenThemeColor(bool soften) {
+    final currentConfig = applicationAccountConfig;
+    return setApplicationAccountConfig(
+      ApplicationAccountConfig(
+        wallpaperUrl: currentConfig.wallpaperUrl,
+        wallpaperOpacity: currentConfig.wallpaperOpacity,
+        wallpaperBlur: currentConfig.wallpaperBlur,
+        primaryColor: currentConfig.primaryColor,
+        softenThemeColor: soften,
+      ),
+    );
+  }
 }
 
 class ApplicationAccountConfig {
   final Uri? wallpaperUrl;
   final double? wallpaperOpacity;
   final double? wallpaperBlur;
+  final int? primaryColor;
+  final bool? softenThemeColor;
 
   const ApplicationAccountConfig({
     this.wallpaperUrl,
     this.wallpaperOpacity,
     this.wallpaperBlur,
+    this.primaryColor,
+    this.softenThemeColor,
   });
 
   static double _sanitizedOpacity(double? opacity) {
@@ -58,11 +91,15 @@ class ApplicationAccountConfig {
           json.tryGet<double>('wallpaper_opacity'),
         ),
         wallpaperBlur: json.tryGet<double>('wallpaper_blur'),
+        primaryColor: json.tryGet<int>('primary_color'),
+        softenThemeColor: json.tryGet<bool>('soften_theme_color'),
       );
 
   Map<String, dynamic> toJson() => {
     'wallpaper_url': wallpaperUrl?.toString(),
     'wallpaper_opacity': wallpaperOpacity,
     'wallpaper_blur': wallpaperBlur,
+    'primary_color': primaryColor,
+    'soften_theme_color': softenThemeColor,
   };
 }

lib/widgets/matrix.dart

@@ -44,10 +44,13 @@ class Matrix extends StatefulWidget {
 
   final SharedPreferences store;
 
+  final ValueChanged<Client?>? onActiveClientChanged;
+
   const Matrix({
     this.child,
     required this.clients,
     required this.store,
+    this.onActiveClientChanged,
     this.queryParameters,
     super.key,
   });
@@ -89,11 +92,21 @@ class MatrixState extends State<Matrix> {
     final i = widget.clients.indexWhere((c) => c == cl);
     if (i != -1) {
       _activeClient = i;
+      _notifyActiveClientChanged();
     } else {
       Logs().w('Tried to set an unknown client ${cl!.userID} as active');
     }
   }
 
+  void _notifyActiveClientChanged() {
+    final callback = widget.onActiveClientChanged;
+    if (callback == null) return;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted) return;
+      callback(widget.clients.isEmpty ? null : client);
+    });
+  }
+
   List<Client?>? get currentBundle {
     if (!hasComplexBundles) {
       return List.from(widget.clients);
@@ -256,19 +269,27 @@ class MatrixState extends State<Matrix> {
         .where((state) => state == LoginState.loggedOut)
         .listen((_) {
           final loggedInWithMultipleClients = widget.clients.length > 1;
+          final activeClient = client;
+          final removedIndex = widget.clients.indexOf(c);
+          final wasActive = removedIndex != -1 && activeClient == c;
 
           _cancelSubs(c.clientName);
           widget.clients.remove(c);
           ClientManager.removeClientNameFromStore(c.clientName, store);
           InitWithRestoreExtension.deleteSessionBackup(name);
+          if (removedIndex != -1 && _activeClient > removedIndex) {
+            _activeClient--;
+          }
+          if (wasActive) {
+            _activeClient = -1;
+          }
+          if (removedIndex != -1) {
+            _notifyActiveClientChanged();
+          }
 
           if (loggedInWithMultipleClients) {
             final snackbarContext =
-                TatuChatApp
-                    .router
-                    .routerDelegate
-                    .navigatorKey
-                    .currentContext ??
+                TatuChatApp.router.routerDelegate.navigatorKey.currentContext ??
                 context;
 
             if (!snackbarContext.mounted) return;
@@ -349,6 +370,7 @@ class MatrixState extends State<Matrix> {
         },
       );
     }
+    _notifyActiveClientChanged();
   }
 
   void didChangeAppLifecycleState(AppLifecycleState state) {

lib/widgets/mxc_image_viewer.dart

@@ -13,47 +13,61 @@ class MxcImageViewer extends StatelessWidget {
 
   const MxcImageViewer(this.mxContent, {super.key});
 
+  /// The viewer is opened with `showDialog` on the root navigator, so closing
+  /// it must always target the root navigator.
+  static void _close(BuildContext context) =>
+      Navigator.of(context, rootNavigator: true).pop();
+
   @override
   Widget build(BuildContext context) {
     final iconButtonStyle = IconButton.styleFrom(
       backgroundColor: Colors.black.withAlpha(200),
       foregroundColor: Colors.white,
     );
-    return GestureDetector(
-      onTap: () => Navigator.of(context).pop(),
-      child: Scaffold(
-        backgroundColor: Colors.black.withAlpha(128),
-        extendBodyBehindAppBar: true,
-        appBar: AppBar(
-          elevation: 0,
-          leading: IconButton(
-            style: iconButtonStyle,
-            icon: const Icon(Icons.close),
-            onPressed: Navigator.of(context).pop,
-            color: Colors.white,
-            tooltip: L10n.of(context).close,
+    return PopScope<Object?>(
+      // Claim the system back button for the viewer so that it is dismissed
+      // instead of letting the router navigate away underneath it.
+      canPop: false,
+      onPopInvokedWithResult: (didPop, _) {
+        if (didPop) return;
+        _close(context);
+      },
+      child: GestureDetector(
+        onTap: () => _close(context),
+        child: Scaffold(
+          backgroundColor: Colors.black.withAlpha(128),
+          extendBodyBehindAppBar: true,
+          appBar: AppBar(
+            elevation: 0,
+            leading: IconButton(
+              style: iconButtonStyle,
+              icon: const Icon(Icons.close),
+              onPressed: () => _close(context),
+              color: Colors.white,
+              tooltip: L10n.of(context).close,
+            ),
+            backgroundColor: Colors.transparent,
           ),
-          backgroundColor: Colors.transparent,
-        ),
-        body: InteractiveViewer(
-          minScale: 1.0,
-          maxScale: 10.0,
-          onInteractionEnd: (endDetails) {
-            if (endDetails.velocity.pixelsPerSecond.dy >
-                MediaQuery.sizeOf(context).height * 1.5) {
-              Navigator.of(context, rootNavigator: false).pop();
-            }
-          },
-          child: Center(
-            child: GestureDetector(
-              // Ignore taps to not go back here:
-              onTap: () {},
-              child: MxcImage(
-                key: ValueKey(mxContent.toString()),
-                uri: mxContent,
-                fit: BoxFit.contain,
-                isThumbnail: false,
-                animated: true,
+          body: InteractiveViewer(
+            minScale: 1.0,
+            maxScale: 10.0,
+            onInteractionEnd: (endDetails) {
+              if (endDetails.velocity.pixelsPerSecond.dy >
+                  MediaQuery.sizeOf(context).height * 1.5) {
+                _close(context);
+              }
+            },
+            child: Center(
+              child: GestureDetector(
+                // Ignore taps to not go back here:
+                onTap: () {},
+                child: MxcImage(
+                  key: ValueKey(mxContent.toString()),
+                  uri: mxContent,
+                  fit: BoxFit.contain,
+                  isThumbnail: false,
+                  animated: true,
+                ),
               ),
             ),
           ),

lib/widgets/tatu_chat_app.dart

@@ -65,38 +65,48 @@ class TatuChatApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ThemeBuilder(
-      builder: (context, themeMode, primaryColor) => MaterialApp.router(
-        title: AppSettings.applicationName.value,
-        themeMode: themeMode,
-        theme: FluffyThemes.buildTheme(context, Brightness.light, primaryColor),
-        darkTheme: FluffyThemes.buildTheme(
-          context,
-          Brightness.dark,
-          primaryColor,
-        ),
-        scrollBehavior: CustomScrollBehavior(),
-        localizationsDelegates: [
-          ...L10n.localizationsDelegates,
-          ...GlobalMaterialLocalizations.delegates,
-          ...GlobalCupertinoLocalizations.delegates,
-        ],
-        supportedLocales: L10n.supportedLocales,
-        routerConfig: router,
-        builder: (context, child) => AppLockWidget(
-          pincode: appLockSettings.pincode,
-          useBiometrics: appLockSettings.useBiometrics,
-          isLoggedIn: clients.any((client) => client.isLogged()),
-          // Need a navigator above the Matrix widget for
-          // displaying dialogs
-          child: Matrix(
-            clients: clients,
-            store: store,
-            child: CallOverlay(
-              child: testWidget ?? child ?? const SizedBox.shrink(),
+      builder: (context, themeMode, primaryColor, themeController) =>
+          MaterialApp.router(
+            title: AppSettings.applicationName.value,
+            themeMode: themeMode,
+            theme: FluffyThemes.buildTheme(
+              context,
+              Brightness.light,
+              primaryColor,
+              themeController.softenPrimaryColor,
+            ),
+            darkTheme: FluffyThemes.buildTheme(
+              context,
+              Brightness.dark,
+              primaryColor,
+              themeController.softenPrimaryColor,
+            ),
+            scrollBehavior: CustomScrollBehavior(),
+            localizationsDelegates: [
+              ...L10n.localizationsDelegates,
+              ...GlobalMaterialLocalizations.delegates,
+              ...GlobalCupertinoLocalizations.delegates,
+            ],
+            supportedLocales: L10n.supportedLocales,
+            routerConfig: router,
+            builder: (context, child) => AppLockWidget(
+              pincode: appLockSettings.pincode,
+              useBiometrics: appLockSettings.useBiometrics,
+              isLoggedIn: clients.any((client) => client.isLogged()),
+              // Need a navigator above the Matrix widget for
+              // displaying dialogs
+              child: Matrix(
+                clients: clients,
+                store: store,
+                onActiveClientChanged: (client) {
+                  themeController.setAccountClient(client);
+                },
+                child: CallOverlay(
+                  child: testWidget ?? child ?? const SizedBox.shrink(),
+                ),
+              ),
             ),
           ),
-        ),
-      ),
     );
   }
 }

lib/widgets/theme_builder.dart

@@ -3,10 +3,15 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+import 'dart:async';
+
 import 'package:collection/collection.dart';
 import 'package:dynamic_color/dynamic_color.dart';
+import 'package:tatchat/config/setting_keys.dart';
+import 'package:tatchat/utils/account_config.dart';
 import 'package:tatchat/utils/color_value.dart';
 import 'package:material_ui/material_ui.dart';
+import 'package:matrix/matrix.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -15,6 +20,7 @@ class ThemeBuilder extends StatefulWidget {
     BuildContext context,
     ThemeMode themeMode,
     Color? primaryColor,
+    ThemeController controller,
   )
   builder;
 
@@ -36,14 +42,42 @@ class ThemeController extends State<ThemeBuilder> {
   SharedPreferences? _sharedPreferences;
   ThemeMode? _themeMode;
   Color? _primaryColor;
+  Color? _localPrimaryColor;
+  Color? _accountPrimaryColor;
+  bool _softenPrimaryColor = false;
+  bool _localSoftenPrimaryColor = false;
+  bool? _accountSoftenPrimaryColor;
+  Client? _accountClient;
+  StreamSubscription<SyncUpdate>? _accountClientSubscription;
+  int _accountClientGeneration = 0;
 
   ThemeMode get themeMode => _themeMode ?? ThemeMode.system;
 
   Color? get primaryColor => _primaryColor;
 
+  bool get softenPrimaryColor => _softenPrimaryColor;
+
   static ThemeController of(BuildContext context) =>
       Provider.of<ThemeController>(context, listen: false);
 
+  void _updatePrimaryColor() {
+    if (!mounted) return;
+    final newColor = _accountPrimaryColor ?? _localPrimaryColor;
+    if (newColor == _primaryColor) return;
+    setState(() {
+      _primaryColor = newColor;
+    });
+  }
+
+  void _updateSoftenPrimaryColor() {
+    if (!mounted) return;
+    final newValue = _accountSoftenPrimaryColor ?? _localSoftenPrimaryColor;
+    if (newValue == _softenPrimaryColor) return;
+    setState(() {
+      _softenPrimaryColor = newValue;
+    });
+  }
+
   Future<void> _loadData(_) async {
     final preferences = _sharedPreferences ??=
         await SharedPreferences.getInstance();
@@ -51,12 +85,16 @@ class ThemeController extends State<ThemeBuilder> {
     final rawThemeMode = preferences.getString(widget.themeModeSettingsKey);
     final rawColor = preferences.getInt(widget.primaryColorSettingsKey);
 
+    if (!mounted) return;
     setState(() {
       _themeMode = ThemeMode.values.singleWhereOrNull(
         (value) => value.name == rawThemeMode,
       );
-      _primaryColor = rawColor == null ? null : Color(rawColor);
+      _localPrimaryColor = rawColor == null ? null : Color(rawColor);
+      _localSoftenPrimaryColor = AppSettings.softenThemeColor.value;
     });
+    _updatePrimaryColor();
+    _updateSoftenPrimaryColor();
   }
 
   Future<void> setThemeMode(ThemeMode newThemeMode) async {
@@ -69,6 +107,12 @@ class ThemeController extends State<ThemeBuilder> {
   }
 
   Future<void> setPrimaryColor(Color? newPrimaryColor) async {
+    if (!mounted) return;
+    setState(() {
+      _localPrimaryColor = newPrimaryColor;
+      _accountPrimaryColor = newPrimaryColor;
+      _primaryColor = newPrimaryColor;
+    });
     final preferences = _sharedPreferences ??=
         await SharedPreferences.getInstance();
     if (newPrimaryColor == null) {
@@ -79,9 +123,78 @@ class ThemeController extends State<ThemeBuilder> {
         newPrimaryColor.hexValue,
       );
     }
+  }
+
+  Future<void> setSoftenPrimaryColor(bool soften) async {
+    await AppSettings.softenThemeColor.setItem(soften);
+    if (!mounted) return;
     setState(() {
-      _primaryColor = newPrimaryColor;
+      _localSoftenPrimaryColor = soften;
+      _accountSoftenPrimaryColor = soften;
+      _softenPrimaryColor = soften;
     });
+    final client = _accountClient;
+    if (client == null) return;
+    try {
+      await client.setApplicationAccountSoftenThemeColor(soften);
+    } catch (err) {
+      Logs().e('TatuChat: failed to sync soften theme color', err);
+    }
+  }
+
+  void setAccountClient(Client? client) {
+    if (!mounted) return;
+    final generation = ++_accountClientGeneration;
+    _accountClientSubscription?.cancel();
+    _accountClientSubscription = null;
+    _accountClient = client;
+    _accountPrimaryColor = null;
+    _accountSoftenPrimaryColor = null;
+    _updatePrimaryColor();
+    _updateSoftenPrimaryColor();
+    if (client == null) return;
+
+    unawaited(_loadAccountClientConfig(client, generation));
+    _accountClientSubscription = client.onSync.stream
+        .where(
+          (sync) =>
+              sync.accountData?.any(
+                (accountData) =>
+                    accountData.type ==
+                    ApplicationAccountConfigExtension.accountDataKey,
+              ) ??
+              false,
+        )
+        .listen((_) => _applyAccountClientConfig(client, generation));
+  }
+
+  Future<void> _loadAccountClientConfig(Client client, int generation) async {
+    final accountDataLoading = client.accountDataLoading;
+    if (accountDataLoading != null) {
+      try {
+        await accountDataLoading;
+      } catch (_) {}
+    }
+    if (!mounted ||
+        generation != _accountClientGeneration ||
+        !identical(_accountClient, client)) {
+      return;
+    }
+    _applyAccountClientConfig(client, generation);
+  }
+
+  void _applyAccountClientConfig(Client client, int generation) {
+    if (!mounted ||
+        generation != _accountClientGeneration ||
+        !identical(_accountClient, client)) {
+      return;
+    }
+    final config = client.applicationAccountConfig;
+    final primaryColor = config.primaryColor;
+    _accountPrimaryColor = primaryColor == null ? null : Color(primaryColor);
+    _accountSoftenPrimaryColor = config.softenThemeColor;
+    _updatePrimaryColor();
+    _updateSoftenPrimaryColor();
   }
 
   @override
@@ -95,9 +208,19 @@ class ThemeController extends State<ThemeBuilder> {
     return Provider(
       create: (_) => this,
       child: DynamicColorBuilder(
-        builder: (light, _) =>
-            widget.builder(context, themeMode, primaryColor ?? light?.primary),
+        builder: (light, _) => widget.builder(
+          context,
+          themeMode,
+          primaryColor ?? light?.primary,
+          this,
+        ),
       ),
     );
   }
+
+  @override
+  void dispose() {
+    _accountClientSubscription?.cancel();
+    super.dispose();
+  }
 }

pubspec.yaml

@@ -118,6 +118,7 @@ flutter:
   uses-material-design: true
   assets:
     - assets/
+    - assets/logo/background.png
     - assets/logo/mini/
     - assets/miniapps/
     - assets/sounds/

test/account_config_test.dart

@@ -0,0 +1,114 @@
+// SPDX-FileCopyrightText: 2026 TatuChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tatchat/utils/account_config.dart';
+
+void main() {
+  group('ApplicationAccountConfig', () {
+    test('Parses primary color from account data', () {
+      final config = ApplicationAccountConfig.fromJson({
+        'primary_color': 0xFF6750A4,
+      });
+      expect(config.primaryColor, 0xFF6750A4);
+    });
+
+    test('Ignores primary color of unexpected type', () {
+      expect(
+        ApplicationAccountConfig.fromJson({
+          'primary_color': '4286369748',
+        }).primaryColor,
+        isNull,
+      );
+      expect(
+        ApplicationAccountConfig.fromJson({'primary_color': 1.5}).primaryColor,
+        isNull,
+      );
+    });
+
+    test('Defaults primary color to null when absent', () {
+      expect(ApplicationAccountConfig.fromJson({}).primaryColor, isNull);
+    });
+
+    test('Serializes primary color', () {
+      const config = ApplicationAccountConfig(primaryColor: 0xFF00D084);
+      expect(config.toJson()['primary_color'], 0xFF00D084);
+    });
+
+    test('Serializes missing primary color as null', () {
+      const config = ApplicationAccountConfig(wallpaperOpacity: 0.5);
+      expect(config.toJson()['primary_color'], isNull);
+    });
+
+    test('Round trips through json', () {
+      final config = ApplicationAccountConfig(
+        wallpaperUrl: Uri.parse('mxc://example.invalid/wallpaper'),
+        wallpaperOpacity: 0.3,
+        wallpaperBlur: 4,
+        primaryColor: 0xFF6750A4,
+        softenThemeColor: true,
+      );
+      final parsed = ApplicationAccountConfig.fromJson(config.toJson());
+      expect(parsed.wallpaperUrl, config.wallpaperUrl);
+      expect(parsed.wallpaperOpacity, config.wallpaperOpacity);
+      expect(parsed.wallpaperBlur, config.wallpaperBlur);
+      expect(parsed.primaryColor, config.primaryColor);
+      expect(parsed.softenThemeColor, config.softenThemeColor);
+    });
+
+    test('Keeps existing wallpaper defaults when parsing color only', () {
+      final config = ApplicationAccountConfig.fromJson({
+        'primary_color': 0xFF6750A4,
+      });
+      expect(config.wallpaperUrl, isNull);
+      expect(config.wallpaperOpacity, 1);
+      expect(config.wallpaperBlur, isNull);
+    });
+
+    test('Parses soften theme color from account data', () {
+      expect(
+        ApplicationAccountConfig.fromJson({
+          'soften_theme_color': true,
+        }).softenThemeColor,
+        isTrue,
+      );
+      expect(
+        ApplicationAccountConfig.fromJson({
+          'soften_theme_color': false,
+        }).softenThemeColor,
+        isFalse,
+      );
+    });
+
+    test('Ignores soften theme color of unexpected type', () {
+      expect(
+        ApplicationAccountConfig.fromJson({
+          'soften_theme_color': 'yes',
+        }).softenThemeColor,
+        isNull,
+      );
+    });
+
+    test('Defaults soften theme color to null when absent', () {
+      expect(ApplicationAccountConfig.fromJson({}).softenThemeColor, isNull);
+    });
+
+    test('Serializes soften theme color', () {
+      const config = ApplicationAccountConfig(softenThemeColor: true);
+      expect(config.toJson()['soften_theme_color'], true);
+    });
+
+    test('Serializes missing soften theme color as null', () {
+      const config = ApplicationAccountConfig(primaryColor: 0xFF00D084);
+      expect(config.toJson()['soften_theme_color'], isNull);
+    });
+
+    test('Round trips soften theme color through json', () {
+      final parsed = ApplicationAccountConfig.fromJson(
+        const ApplicationAccountConfig(softenThemeColor: true).toJson(),
+      );
+      expect(parsed.softenThemeColor, isTrue);
+    });
+  });
+}