feat: Add default chat wallpaper

lib/pages/chat/chat_event_list.dart

@@ -9,7 +9,6 @@ import 'package:fluffychat/pages/chat/events/message.dart';
 import 'package:fluffychat/pages/chat/seen_by_row.dart';
 import 'package:fluffychat/pages/chat/typing_indicators.dart';
 import 'package:fluffychat/pages/user_bottom_sheet/user_bottom_sheet.dart';
-import 'package:fluffychat/utils/account_config.dart';
 import 'package:fluffychat/utils/adaptive_bottom_sheet.dart';
 import 'package:fluffychat/utils/matrix_sdk_extensions/filtered_timeline_extension.dart';
 import 'package:fluffychat/utils/platform_infos.dart';
@@ -34,10 +33,6 @@ class ChatEventList extends StatelessWidget {
     for (var i = 0; i < events.length; i++) {
       thisEventsKeyMap[events[i].eventId] = i;
     }
-
-    final hasWallpaper =
-        controller.room.client.applicationAccountConfig.wallpaperUrl != null;
-
     return SelectionArea(
       child: ListView.custom(
         padding: EdgeInsets.only(
@@ -142,8 +137,7 @@ class ChatEventList extends StatelessWidget {
                     i > 0 && controller.readMarkerEventId == event.eventId,
                 nextEvent: i + 1 < events.length ? events[i + 1] : null,
                 previousEvent: i > 0 ? events[i - 1] : null,
-                avatarPresenceBackgroundColor:
-                    hasWallpaper ? Colors.transparent : null,
+                avatarPresenceBackgroundColor: Colors.transparent,
               ),
             );
           },

lib/pages/chat/chat_view.dart

@@ -260,18 +260,30 @@ class ChatView extends StatelessWidget {
                 onDragExited: controller.onDragExited,
                 child: Stack(
                   children: <Widget>[
-                    if (accountConfig.wallpaperUrl != null)
-                      Opacity(
-                        opacity: accountConfig.wallpaperOpacity ?? 1,
-                        child: MxcImage(
-                          uri: accountConfig.wallpaperUrl,
-                          fit: BoxFit.cover,
-                          isThumbnail: true,
-                          width: FluffyThemes.columnWidth * 4,
-                          height: FluffyThemes.columnWidth * 4,
-                          placeholder: (_) => Container(),
-                        ),
-                      ),
+                    accountConfig.wallpaperUrl != null
+                        ? Opacity(
+                            opacity: accountConfig.wallpaperOpacity ?? 1,
+                            child: MxcImage(
+                              uri: accountConfig.wallpaperUrl,
+                              fit: BoxFit.cover,
+                              isThumbnail: true,
+                              width: FluffyThemes.columnWidth * 4,
+                              height: FluffyThemes.columnWidth * 4,
+                              placeholder: (_) => Container(),
+                            ),
+                          )
+                        : ColorFiltered(
+                            colorFilter: ColorFilter.mode(
+                              theme.colorScheme.surfaceContainerHighest,
+                              BlendMode.color,
+                            ),
+                            child: Image.asset(
+                              'assets/chat_wallpaper_${theme.brightness.name}.png',
+                              fit: BoxFit.cover,
+                              width: double.infinity,
+                              height: double.infinity,
+                            ),
+                          ),
                     SafeArea(
                       child: Column(
                         children: <Widget>[
@@ -308,10 +320,7 @@ class ChatView extends StatelessWidget {
                               alignment: Alignment.center,
                               child: Material(
                                 clipBehavior: Clip.hardEdge,
-                                color: theme
-                                    .colorScheme
-                                    // ignore: deprecated_member_use
-                                    .surfaceVariant,
+                                color: theme.colorScheme.surfaceBright,
                                 borderRadius: const BorderRadius.all(
                                   Radius.circular(24),
                                 ),

lib/pages/chat/events/message.dart

@@ -84,7 +84,7 @@ class Message extends StatelessWidget {
     final ownMessage = event.senderId == client.userID;
     final alignment = ownMessage ? Alignment.topRight : Alignment.topLeft;
     // ignore: deprecated_member_use
-    var color = theme.colorScheme.surfaceVariant;
+    var color = theme.colorScheme.surfaceBright;
     final displayTime = event.type == EventTypes.RoomCreate ||
         nextEvent == null ||
         !event.originServerTs.sameEnvironment(nextEvent!.originServerTs);

lib/pages/chat/events/room_creation_state_event.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/l10n.dart';
 import 'package:matrix/matrix.dart';
 
+import 'package:fluffychat/config/app_config.dart';
 import 'package:fluffychat/utils/date_time_extension.dart';
 import 'package:fluffychat/utils/matrix_sdk_extensions/matrix_locals.dart';
 import 'package:fluffychat/widgets/avatar.dart';
@@ -27,11 +28,27 @@ class RoomCreationStateEvent extends StatelessWidget {
         ),
         Text(
           roomName,
-          style: theme.textTheme.headlineSmall,
+          style: TextStyle(
+            fontSize: 24 * AppConfig.fontSizeFactor,
+            shadows: [
+              Shadow(
+                color: theme.colorScheme.surface,
+                blurRadius: 3,
+              ),
+            ],
+          ),
         ),
         Text(
           '${event.originServerTs.localizedTime(context)} | ${l10n.countParticipants((event.room.summary.mJoinedMemberCount ?? 1) + (event.room.summary.mInvitedMemberCount ?? 0))}',
-          style: theme.textTheme.labelSmall,
+          style: TextStyle(
+            fontSize: 12 * AppConfig.fontSizeFactor,
+            shadows: [
+              Shadow(
+                color: theme.colorScheme.surface,
+                blurRadius: 3,
+              ),
+            ],
+          ),
         ),
         const SizedBox(height: 48),
       ],

lib/pages/chat/typing_indicators.dart

@@ -81,9 +81,7 @@ class TypingIndicators extends StatelessWidget {
                 ),
                 const SizedBox(width: 8),
                 Material(
-                  color:
-                      // ignore: deprecated_member_use
-                      theme.colorScheme.surfaceVariant,
+                  color: theme.colorScheme.surfaceBright,
                   borderRadius: const BorderRadius.all(
                     Radius.circular(AppConfig.borderRadius),
                   ),