refactor: Use non nullable localizations builder and lazy load on web

l10n.yaml

@@ -3,3 +3,5 @@ template-arb-file: intl_en.arb
 output-localization-file: l10n.dart
 output-class: L10n
 preferred-supported-locales: ["en"]
+use-deferred-loading: true
+nullable-getter: false

lib/pages/archive/archive.dart

@@ -42,10 +42,10 @@ class ArchiveController extends State<Archive> {
     if (await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.areYouSure,
-          okLabel: L10n.of(context)!.yes,
-          cancelLabel: L10n.of(context)!.cancel,
-          message: L10n.of(context)!.clearArchive,
+          title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).yes,
+          cancelLabel: L10n.of(context).cancel,
+          message: L10n.of(context).clearArchive,
         ) !=
         OkCancelResult.ok) {
       return;

lib/pages/archive/archive_view.dart

@@ -20,14 +20,14 @@ class ArchiveView extends StatelessWidget {
       builder: (BuildContext context, snapshot) => Scaffold(
         appBar: AppBar(
           leading: const Center(child: BackButton()),
-          title: Text(L10n.of(context)!.archive),
+          title: Text(L10n.of(context).archive),
           actions: [
             if (snapshot.data?.isNotEmpty ?? false)
               Padding(
                 padding: const EdgeInsets.all(8.0),
                 child: TextButton.icon(
                   onPressed: controller.forgetAllAction,
-                  label: Text(L10n.of(context)!.clearArchive),
+                  label: Text(L10n.of(context).clearArchive),
                   icon: const Icon(Icons.cleaning_services_outlined),
                 ),
               ),
@@ -40,7 +40,7 @@ class ArchiveView extends StatelessWidget {
               if (snapshot.hasError) {
                 return Center(
                   child: Text(
-                    L10n.of(context)!.oopsSomethingWentWrong,
+                    L10n.of(context).oopsSomethingWentWrong,
                     textAlign: TextAlign.center,
                   ),
                 );

lib/pages/bootstrap/bootstrap_dialog.dart

@@ -61,12 +61,12 @@ class BootstrapDialogState extends State<BootstrapDialog> {
 
   String _getSecureStorageLocalizedName() {
     if (PlatformInfos.isAndroid) {
-      return L10n.of(context)!.storeInAndroidKeystore;
+      return L10n.of(context).storeInAndroidKeystore;
     }
     if (PlatformInfos.isIOS || PlatformInfos.isMacOS) {
-      return L10n.of(context)!.storeInAppleKeyChain;
+      return L10n.of(context).storeInAppleKeyChain;
     }
-    return L10n.of(context)!.storeSecurlyOnThisDevice;
+    return L10n.of(context).storeSecurlyOnThisDevice;
   }
 
   @override
@@ -92,12 +92,12 @@ class BootstrapDialogState extends State<BootstrapDialog> {
     _wipe ??= widget.wipe;
     final buttons = <Widget>[];
     Widget body = const CircularProgressIndicator.adaptive();
-    titleText = L10n.of(context)!.loadingPleaseWait;
+    titleText = L10n.of(context).loadingPleaseWait;
 
     if (bootstrap.newSsssKey?.recoveryKey != null &&
         _recoveryKeyStored == false) {
       final key = bootstrap.newSsssKey!.recoveryKey;
-      titleText = L10n.of(context)!.recoveryKey;
+      titleText = L10n.of(context).recoveryKey;
       return Scaffold(
         appBar: AppBar(
           centerTitle: true,
@@ -105,7 +105,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
             icon: const Icon(Icons.close),
             onPressed: Navigator.of(context).pop,
           ),
-          title: Text(L10n.of(context)!.recoveryKey),
+          title: Text(L10n.of(context).recoveryKey),
         ),
         body: Center(
           child: ConstrainedBox(
@@ -123,7 +123,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                       color: theme.colorScheme.primary,
                     ),
                   ),
-                  subtitle: Text(L10n.of(context)!.chatBackupDescription),
+                  subtitle: Text(L10n.of(context).chatBackupDescription),
                 ),
                 const Divider(
                   height: 32,
@@ -153,7 +153,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                     },
                     title: Text(_getSecureStorageLocalizedName()),
                     subtitle:
-                        Text(L10n.of(context)!.storeInSecureStorageDescription),
+                        Text(L10n.of(context).storeInSecureStorageDescription),
                   ),
                 const SizedBox(height: 16),
                 CheckboxListTile.adaptive(
@@ -164,13 +164,13 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                     FluffyShare.share(key!, context);
                     setState(() => _recoveryKeyCopied = true);
                   },
-                  title: Text(L10n.of(context)!.copyToClipboard),
-                  subtitle: Text(L10n.of(context)!.saveKeyManuallyDescription),
+                  title: Text(L10n.of(context).copyToClipboard),
+                  subtitle: Text(L10n.of(context).saveKeyManuallyDescription),
                 ),
                 const SizedBox(height: 16),
                 ElevatedButton.icon(
                   icon: const Icon(Icons.check_outlined),
-                  label: Text(L10n.of(context)!.next),
+                  label: Text(L10n.of(context).next),
                   onPressed:
                       (_recoveryKeyCopied || _storeInSecureStorage == true)
                           ? () {
@@ -227,7 +227,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                 icon: const Icon(Icons.close),
                 onPressed: Navigator.of(context).pop,
               ),
-              title: Text(L10n.of(context)!.chatBackup),
+              title: Text(L10n.of(context).chatBackup),
             ),
             body: Center(
               child: ConstrainedBox(
@@ -245,7 +245,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                         color: theme.colorScheme.primary,
                       ),
                       subtitle: Text(
-                        L10n.of(context)!.pleaseEnterRecoveryKeyDescription,
+                        L10n.of(context).pleaseEnterRecoveryKeyDescription,
                       ),
                     ),
                     const Divider(height: 32),
@@ -265,7 +265,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                           fontFamily: theme.textTheme.bodyLarge?.fontFamily,
                         ),
                         prefixIcon: const Icon(Icons.key_outlined),
-                        labelText: L10n.of(context)!.recoveryKey,
+                        labelText: L10n.of(context).recoveryKey,
                         hintText: 'Es** **** **** ****',
                         errorText: _recoveryKeyInputError,
                         errorMaxLines: 2,
@@ -280,7 +280,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                       icon: _recoveryKeyInputLoading
                           ? const CircularProgressIndicator.adaptive()
                           : const Icon(Icons.lock_open_outlined),
-                      label: Text(L10n.of(context)!.unlockOldMessages),
+                      label: Text(L10n.of(context).unlockOldMessages),
                       onPressed: _recoveryKeyInputLoading
                           ? null
                           : () async {
@@ -323,7 +323,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                               } on FormatException catch (_) {
                                 setState(
                                   () => _recoveryKeyInputError =
-                                      L10n.of(context)!.wrongRecoveryKey,
+                                      L10n.of(context).wrongRecoveryKey,
                                 );
                               } catch (e, s) {
                                 ErrorReporter(
@@ -347,7 +347,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                         const Expanded(child: Divider()),
                         Padding(
                           padding: const EdgeInsets.all(12.0),
-                          child: Text(L10n.of(context)!.or),
+                          child: Text(L10n.of(context).or),
                         ),
                         const Expanded(child: Divider()),
                       ],
@@ -355,17 +355,17 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                     const SizedBox(height: 16),
                     ElevatedButton.icon(
                       icon: const Icon(Icons.cast_connected_outlined),
-                      label: Text(L10n.of(context)!.transferFromAnotherDevice),
+                      label: Text(L10n.of(context).transferFromAnotherDevice),
                       onPressed: _recoveryKeyInputLoading
                           ? null
                           : () async {
                               final consent = await showOkCancelAlertDialog(
                                 context: context,
-                                title: L10n.of(context)!.verifyOtherDevice,
-                                message: L10n.of(context)!
+                                title: L10n.of(context).verifyOtherDevice,
+                                message: L10n.of(context)
                                     .verifyOtherDeviceDescription,
-                                okLabel: L10n.of(context)!.ok,
-                                cancelLabel: L10n.of(context)!.cancel,
+                                okLabel: L10n.of(context).ok,
+                                cancelLabel: L10n.of(context).cancel,
                                 fullyCapitalizedForMaterial: false,
                               );
                               if (consent != OkCancelResult.ok) return;
@@ -391,7 +391,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                         foregroundColor: theme.colorScheme.onErrorContainer,
                       ),
                       icon: const Icon(Icons.delete_outlined),
-                      label: Text(L10n.of(context)!.recoveryKeyLost),
+                      label: Text(L10n.of(context).recoveryKeyLost),
                       onPressed: _recoveryKeyInputLoading
                           ? null
                           : () async {
@@ -399,10 +399,10 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                                   await showOkCancelAlertDialog(
                                     useRootNavigator: false,
                                     context: context,
-                                    title: L10n.of(context)!.recoveryKeyLost,
-                                    message: L10n.of(context)!.wipeChatBackup,
-                                    okLabel: L10n.of(context)!.ok,
-                                    cancelLabel: L10n.of(context)!.cancel,
+                                    title: L10n.of(context).recoveryKeyLost,
+                                    message: L10n.of(context).wipeChatBackup,
+                                    okLabel: L10n.of(context).ok,
+                                    cancelLabel: L10n.of(context).cancel,
                                     isDestructiveAction: true,
                                   )) {
                                 setState(() => _createBootstrap(true));
@@ -440,18 +440,18 @@ class BootstrapDialogState extends State<BootstrapDialog> {
           );
           break;
         case BootstrapState.error:
-          titleText = L10n.of(context)!.oopsSomethingWentWrong;
+          titleText = L10n.of(context).oopsSomethingWentWrong;
           body = const Icon(Icons.error_outline, color: Colors.red, size: 80);
           buttons.add(
             OutlinedButton(
               onPressed: () =>
                   Navigator.of(context, rootNavigator: false).pop<bool>(false),
-              child: Text(L10n.of(context)!.close),
+              child: Text(L10n.of(context).close),
             ),
           );
           break;
         case BootstrapState.done:
-          titleText = L10n.of(context)!.everythingReady;
+          titleText = L10n.of(context).everythingReady;
           body = Column(
             mainAxisSize: MainAxisSize.min,
             children: [
@@ -462,7 +462,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
               ),
               const SizedBox(height: 16),
               Text(
-                L10n.of(context)!.yourChatBackupHasBeenSetUp,
+                L10n.of(context).yourChatBackupHasBeenSetUp,
                 style: const TextStyle(fontSize: 20),
               ),
               const SizedBox(height: 16),
@@ -472,7 +472,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
             OutlinedButton(
               onPressed: () =>
                   Navigator.of(context, rootNavigator: false).pop<bool>(false),
-              child: Text(L10n.of(context)!.close),
+              child: Text(L10n.of(context).close),
             ),
           );
           break;
@@ -487,7 +487,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                 Navigator.of(context, rootNavigator: false).pop<bool>(true),
           ),
         ),
-        title: Text(titleText ?? L10n.of(context)!.loadingPleaseWait),
+        title: Text(titleText ?? L10n.of(context).loadingPleaseWait),
       ),
       body: Center(
         child: Column(

lib/pages/chat/add_widget_tile.dart

@@ -43,14 +43,14 @@ class AddWidgetTileState extends State<AddWidgetTile> {
 
       if (name.length < 3) {
         setState(() {
-          nameError = L10n.of(context)!.widgetNameError;
+          nameError = L10n.of(context).widgetNameError;
         });
         return;
       }
 
       if (uri == null || uri.scheme != 'https') {
         setState(() {
-          urlError = L10n.of(context)!.widgetUrlError;
+          urlError = L10n.of(context).widgetUrlError;
         });
         return;
       }
@@ -75,7 +75,7 @@ class AddWidgetTileState extends State<AddWidgetTile> {
       Navigator.of(context).pop();
     } catch (e) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(L10n.of(context)!.errorAddingWidget)),
+        SnackBar(content: Text(L10n.of(context).errorAddingWidget)),
       );
     }
   }

lib/pages/chat/add_widget_tile_view.dart

@@ -13,7 +13,7 @@ class AddWidgetTileView extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ExpansionTile(
-      title: Text(L10n.of(context)!.addWidget),
+      title: Text(L10n.of(context).addWidget),
       leading: const Icon(Icons.add),
       initiallyExpanded: controller.initiallyExpanded,
       children: [
@@ -21,10 +21,10 @@ class AddWidgetTileView extends StatelessWidget {
           groupValue: controller.widgetType,
           padding: const EdgeInsets.all(8),
           children: {
-            'm.etherpad': Text(L10n.of(context)!.widgetEtherpad),
-            'm.jitsi': Text(L10n.of(context)!.widgetJitsi),
-            'm.video': Text(L10n.of(context)!.widgetVideo),
-            'm.custom': Text(L10n.of(context)!.widgetCustom),
+            'm.etherpad': Text(L10n.of(context).widgetEtherpad),
+            'm.jitsi': Text(L10n.of(context).widgetJitsi),
+            'm.video': Text(L10n.of(context).widgetVideo),
+            'm.custom': Text(L10n.of(context).widgetCustom),
           }.map(
             (key, value) => MapEntry(
               key,
@@ -43,7 +43,7 @@ class AddWidgetTileView extends StatelessWidget {
             autofocus: true,
             decoration: InputDecoration(
               prefixIcon: const Icon(Icons.label),
-              label: Text(L10n.of(context)!.widgetName),
+              label: Text(L10n.of(context).widgetName),
               errorText: controller.nameError,
             ),
           ),
@@ -54,7 +54,7 @@ class AddWidgetTileView extends StatelessWidget {
             controller: controller.urlController,
             decoration: InputDecoration(
               prefixIcon: const Icon(Icons.add_link),
-              label: Text(L10n.of(context)!.link),
+              label: Text(L10n.of(context).link),
               errorText: controller.urlError,
             ),
           ),
@@ -63,7 +63,7 @@ class AddWidgetTileView extends StatelessWidget {
           children: [
             TextButton(
               onPressed: controller.addWidget,
-              child: Text(L10n.of(context)!.addWidget),
+              child: Text(L10n.of(context).addWidget),
             ),
           ],
         ),

lib/pages/chat/chat.dart

@@ -56,12 +56,11 @@ class ChatPage extends StatelessWidget {
     final room = Matrix.of(context).client.getRoomById(roomId);
     if (room == null) {
       return Scaffold(
-        appBar: AppBar(title: Text(L10n.of(context)!.oopsSomethingWentWrong)),
+        appBar: AppBar(title: Text(L10n.of(context).oopsSomethingWentWrong)),
         body: Center(
           child: Padding(
             padding: const EdgeInsets.all(16),
-            child:
-                Text(L10n.of(context)!.youAreNoLongerParticipatingInThisChat),
+            child: Text(L10n.of(context).youAreNoLongerParticipatingInThisChat),
           ),
         ),
       );
@@ -446,7 +445,7 @@ class ChatController extends State<ChatPageWithRoom>
     final commandMatch = RegExp(r'^\/(\w+)').firstMatch(sendController.text);
     if (commandMatch != null &&
         !sendingClient.commands.keys.contains(commandMatch[1]!.toLowerCase())) {
-      final l10n = L10n.of(context)!;
+      final l10n = L10n.of(context);
       final dialogResult = await showOkCancelAlertDialog(
         context: context,
         title: l10n.commandInvalid,
@@ -564,9 +563,9 @@ class ChatController extends State<ChatPageWithRoom>
       if (info.version.sdkInt < 19) {
         showOkAlertDialog(
           context: context,
-          title: L10n.of(context)!.unsupportedAndroidVersion,
-          message: L10n.of(context)!.unsupportedAndroidVersionLong,
-          okLabel: L10n.of(context)!.close,
+          title: L10n.of(context).unsupportedAndroidVersion,
+          message: L10n.of(context).unsupportedAndroidVersionLong,
+          okLabel: L10n.of(context).close,
         );
         return;
       }
@@ -646,12 +645,12 @@ class ChatController extends State<ChatPageWithRoom>
     if (selectedEvents.length == 1) {
       return selectedEvents.first
           .getDisplayEvent(timeline!)
-          .calcLocalizedBodyFallback(MatrixLocals(L10n.of(context)!));
+          .calcLocalizedBodyFallback(MatrixLocals(L10n.of(context)));
     }
     for (final event in selectedEvents) {
       if (copyString.isNotEmpty) copyString += '\n\n';
       copyString += event.getDisplayEvent(timeline!).calcLocalizedBodyFallback(
-            MatrixLocals(L10n.of(context)!),
+            MatrixLocals(L10n.of(context)),
             withSenderNamePrefix: true,
           );
     }
@@ -670,32 +669,32 @@ class ChatController extends State<ChatPageWithRoom>
     final event = selectedEvents.single;
     final score = await showConfirmationDialog<int>(
       context: context,
-      title: L10n.of(context)!.reportMessage,
-      message: L10n.of(context)!.howOffensiveIsThisContent,
-      cancelLabel: L10n.of(context)!.cancel,
-      okLabel: L10n.of(context)!.ok,
+      title: L10n.of(context).reportMessage,
+      message: L10n.of(context).howOffensiveIsThisContent,
+      cancelLabel: L10n.of(context).cancel,
+      okLabel: L10n.of(context).ok,
       actions: [
         AlertDialogAction(
           key: -100,
-          label: L10n.of(context)!.extremeOffensive,
+          label: L10n.of(context).extremeOffensive,
         ),
         AlertDialogAction(
           key: -50,
-          label: L10n.of(context)!.offensive,
+          label: L10n.of(context).offensive,
         ),
         AlertDialogAction(
           key: 0,
-          label: L10n.of(context)!.inoffensive,
+          label: L10n.of(context).inoffensive,
         ),
       ],
     );
     if (score == null) return;
     final reason = await showTextInputDialog(
       context: context,
-      title: L10n.of(context)!.whyDoYouWantToReportThis,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
-      textFields: [DialogTextField(hintText: L10n.of(context)!.reason)],
+      title: L10n.of(context).whyDoYouWantToReportThis,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
+      textFields: [DialogTextField(hintText: L10n.of(context).reason)],
     );
     if (reason == null || reason.single.isEmpty) return;
     final result = await showFutureLoadingDialog(
@@ -713,7 +712,7 @@ class ChatController extends State<ChatPageWithRoom>
       selectedEvents.clear();
     });
     ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(L10n.of(context)!.contentHasBeenReported)),
+      SnackBar(content: Text(L10n.of(context).contentHasBeenReported)),
     );
   }
 
@@ -740,16 +739,16 @@ class ChatController extends State<ChatPageWithRoom>
     final reasonInput = selectedEvents.any((event) => event.status.isSent)
         ? await showTextInputDialog(
             context: context,
-            title: L10n.of(context)!.redactMessage,
-            message: L10n.of(context)!.redactMessageDescription,
+            title: L10n.of(context).redactMessage,
+            message: L10n.of(context).redactMessageDescription,
             isDestructiveAction: true,
             textFields: [
               DialogTextField(
-                hintText: L10n.of(context)!.optionalRedactReason,
+                hintText: L10n.of(context).optionalRedactReason,
               ),
             ],
-            okLabel: L10n.of(context)!.remove,
-            cancelLabel: L10n.of(context)!.cancel,
+            okLabel: L10n.of(context).remove,
+            cancelLabel: L10n.of(context).cancel,
           )
         : <String>[];
     if (reasonInput == null) return;
@@ -1015,7 +1014,7 @@ class ChatController extends State<ChatPageWithRoom>
       editEvent = selectedEvents.first;
       sendController.text =
           editEvent!.getDisplayEvent(timeline!).calcLocalizedBodyFallback(
-                MatrixLocals(L10n.of(context)!),
+                MatrixLocals(L10n.of(context)),
                 withSenderNamePrefix: false,
                 hideReply: true,
               );
@@ -1028,13 +1027,13 @@ class ChatController extends State<ChatPageWithRoom>
     if (OkCancelResult.ok !=
         await showOkCancelAlertDialog(
           context: context,
-          title: L10n.of(context)!.goToTheNewRoom,
+          title: L10n.of(context).goToTheNewRoom,
           message: room
               .getState(EventTypes.RoomTombstone)!
               .parsedTombstoneContent
               .body,
-          okLabel: L10n.of(context)!.ok,
-          cancelLabel: L10n.of(context)!.cancel,
+          okLabel: L10n.of(context).ok,
+          cancelLabel: L10n.of(context).cancel,
         )) {
       return;
     }
@@ -1117,10 +1116,10 @@ class ChatController extends State<ChatPageWithRoom>
   unpinEvent(String eventId) async {
     final response = await showOkCancelAlertDialog(
       context: context,
-      title: L10n.of(context)!.unpin,
-      message: L10n.of(context)!.confirmEventUnpin,
-      okLabel: L10n.of(context)!.unpin,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).unpin,
+      message: L10n.of(context).confirmEventUnpin,
+      okLabel: L10n.of(context).unpin,
+      cancelLabel: L10n.of(context).cancel,
     );
     if (response == OkCancelResult.ok) {
       final events = room.pinnedEventIds
@@ -1214,26 +1213,26 @@ class ChatController extends State<ChatPageWithRoom>
           Navigator.pop(context);
           showOkAlertDialog(
             context: context,
-            title: L10n.of(context)!.unsupportedAndroidVersion,
-            message: L10n.of(context)!.unsupportedAndroidVersionLong,
-            okLabel: L10n.of(context)!.close,
+            title: L10n.of(context).unsupportedAndroidVersion,
+            message: L10n.of(context).unsupportedAndroidVersionLong,
+            okLabel: L10n.of(context).close,
           );
         }
       });
     }
     final callType = await showModalActionSheet<CallType>(
       context: context,
-      title: L10n.of(context)!.warning,
-      message: L10n.of(context)!.videoCallsBetaWarning,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).warning,
+      message: L10n.of(context).videoCallsBetaWarning,
+      cancelLabel: L10n.of(context).cancel,
       actions: [
         SheetAction(
-          label: L10n.of(context)!.voiceCall,
+          label: L10n.of(context).voiceCall,
           icon: Icons.phone_outlined,
           key: CallType.kVoice,
         ),
         SheetAction(
-          label: L10n.of(context)!.videoCall,
+          label: L10n.of(context).videoCall,
           icon: Icons.video_call_outlined,
           key: CallType.kVideo,
         ),

lib/pages/chat/chat_app_bar_title.dart

@@ -36,7 +36,7 @@ class ChatAppBarTitle extends StatelessWidget {
             child: Avatar(
               mxContent: room.avatar,
               name: room.getLocalizedDisplayname(
-                MatrixLocals(L10n.of(context)!),
+                MatrixLocals(L10n.of(context)),
               ),
               size: 32,
             ),
@@ -47,7 +47,7 @@ class ChatAppBarTitle extends StatelessWidget {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 Text(
-                  room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)!)),
+                  room.getLocalizedDisplayname(MatrixLocals(L10n.of(context))),
                   maxLines: 1,
                   overflow: TextOverflow.ellipsis,
                   style: const TextStyle(
@@ -63,13 +63,13 @@ class ChatAppBarTitle extends StatelessWidget {
                       final style = Theme.of(context).textTheme.bodySmall;
                       if (presence?.currentlyActive == true) {
                         return Text(
-                          L10n.of(context)!.currentlyActive,
+                          L10n.of(context).currentlyActive,
                           style: style,
                         );
                       }
                       if (lastActiveTimestamp != null) {
                         return Text(
-                          L10n.of(context)!.lastActiveAgo(
+                          L10n.of(context).lastActiveAgo(
                             lastActiveTimestamp.localizedTimeShort(context),
                           ),
                           style: style,

lib/pages/chat/chat_emoji_picker.dart

@@ -30,8 +30,8 @@ class ChatEmojiPicker extends StatelessWidget {
                 children: [
                   TabBar(
                     tabs: [
-                      Tab(text: L10n.of(context)!.emojis),
-                      Tab(text: L10n.of(context)!.stickers),
+                      Tab(text: L10n.of(context).emojis),
+                      Tab(text: L10n.of(context).stickers),
                     ],
                   ),
                   Expanded(
@@ -97,7 +97,7 @@ class NoRecent extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Text(
-      L10n.of(context)!.emoteKeyboardNoRecents,
+      L10n.of(context).emoteKeyboardNoRecents,
       style: Theme.of(context).textTheme.bodyLarge,
     );
   }

lib/pages/chat/chat_input_row.dart

@@ -44,7 +44,7 @@ class ChatInputRow extends StatelessWidget {
                     child: Row(
                       children: <Widget>[
                         const Icon(Icons.delete),
-                        Text(L10n.of(context)!.delete),
+                        Text(L10n.of(context).delete),
                       ],
                     ),
                   ),
@@ -57,7 +57,7 @@ class ChatInputRow extends StatelessWidget {
                     child: Row(
                       children: <Widget>[
                         const Icon(Icons.keyboard_arrow_left_outlined),
-                        Text(L10n.of(context)!.forward),
+                        Text(L10n.of(context).forward),
                       ],
                     ),
                   ),
@@ -73,7 +73,7 @@ class ChatInputRow extends StatelessWidget {
                             onPressed: controller.replyAction,
                             child: Row(
                               children: <Widget>[
-                                Text(L10n.of(context)!.reply),
+                                Text(L10n.of(context).reply),
                                 const Icon(Icons.keyboard_arrow_right),
                               ],
                             ),
@@ -85,7 +85,7 @@ class ChatInputRow extends StatelessWidget {
                             onPressed: controller.sendAgainAction,
                             child: Row(
                               children: <Widget>[
-                                Text(L10n.of(context)!.tryToSendAgain),
+                                Text(L10n.of(context).tryToSendAgain),
                                 const SizedBox(width: 4),
                                 const Icon(Icons.send_outlined, size: 16),
                               ],
@@ -103,7 +103,7 @@ class ChatInputRow extends StatelessWidget {
                 },
                 onKeysPressed: () =>
                     controller.onAddPopupMenuButtonSelected('file'),
-                helpLabel: L10n.of(context)!.sendFile,
+                helpLabel: L10n.of(context).sendFile,
                 child: AnimatedContainer(
                   duration: FluffyThemes.animationDuration,
                   curve: FluffyThemes.animationCurve,
@@ -125,7 +125,7 @@ class ChatInputRow extends StatelessWidget {
                             foregroundColor: Colors.white,
                             child: Icon(Icons.attachment_outlined),
                           ),
-                          title: Text(L10n.of(context)!.sendFile),
+                          title: Text(L10n.of(context).sendFile),
                           contentPadding: const EdgeInsets.all(0),
                         ),
                       ),
@@ -137,7 +137,7 @@ class ChatInputRow extends StatelessWidget {
                             foregroundColor: Colors.white,
                             child: Icon(Icons.image_outlined),
                           ),
-                          title: Text(L10n.of(context)!.sendImage),
+                          title: Text(L10n.of(context).sendImage),
                           contentPadding: const EdgeInsets.all(0),
                         ),
                       ),
@@ -150,7 +150,7 @@ class ChatInputRow extends StatelessWidget {
                               foregroundColor: Colors.white,
                               child: Icon(Icons.camera_alt_outlined),
                             ),
-                            title: Text(L10n.of(context)!.openCamera),
+                            title: Text(L10n.of(context).openCamera),
                             contentPadding: const EdgeInsets.all(0),
                           ),
                         ),
@@ -163,7 +163,7 @@ class ChatInputRow extends StatelessWidget {
                               foregroundColor: Colors.white,
                               child: Icon(Icons.videocam_outlined),
                             ),
-                            title: Text(L10n.of(context)!.openVideoCamera),
+                            title: Text(L10n.of(context).openVideoCamera),
                             contentPadding: const EdgeInsets.all(0),
                           ),
                         ),
@@ -176,7 +176,7 @@ class ChatInputRow extends StatelessWidget {
                               foregroundColor: Colors.white,
                               child: Icon(Icons.gps_fixed_outlined),
                             ),
-                            title: Text(L10n.of(context)!.shareLocation),
+                            title: Text(L10n.of(context).shareLocation),
                             contentPadding: const EdgeInsets.all(0),
                           ),
                         ),
@@ -194,9 +194,9 @@ class ChatInputRow extends StatelessWidget {
                     LogicalKeyboardKey.keyE,
                   },
                   onKeysPressed: controller.emojiPickerAction,
-                  helpLabel: L10n.of(context)!.emojis,
+                  helpLabel: L10n.of(context).emojis,
                   child: IconButton(
-                    tooltip: L10n.of(context)!.emojis,
+                    tooltip: L10n.of(context).emojis,
                     icon: PageTransitionSwitcher(
                       transitionBuilder: (
                         Widget child,
@@ -255,7 +255,7 @@ class ChatInputRow extends StatelessWidget {
                         bottom: 6.0,
                         top: 3.0,
                       ),
-                      hintText: L10n.of(context)!.writeAMessage,
+                      hintText: L10n.of(context).writeAMessage,
                       hintMaxLines: 1,
                       border: InputBorder.none,
                       enabledBorder: InputBorder.none,
@@ -272,7 +272,7 @@ class ChatInputRow extends StatelessWidget {
                 child: PlatformInfos.platformCanRecord &&
                         controller.sendController.text.isEmpty
                     ? FloatingActionButton.small(
-                        tooltip: L10n.of(context)!.voiceMessage,
+                        tooltip: L10n.of(context).voiceMessage,
                         onPressed: controller.voiceMessageAction,
                         elevation: 0,
                         heroTag: null,
@@ -284,7 +284,7 @@ class ChatInputRow extends StatelessWidget {
                         child: const Icon(Icons.mic_none_outlined),
                       )
                     : FloatingActionButton.small(
-                        tooltip: L10n.of(context)!.send,
+                        tooltip: L10n.of(context).send,
                         onPressed: controller.send,
                         elevation: 0,
                         heroTag: null,

lib/pages/chat/chat_view.dart

@@ -38,12 +38,12 @@ class ChatView extends StatelessWidget {
         if (controller.canEditSelectedEvents)
           IconButton(
             icon: const Icon(Icons.edit_outlined),
-            tooltip: L10n.of(context)!.edit,
+            tooltip: L10n.of(context).edit,
             onPressed: controller.editSelectedEventAction,
           ),
         IconButton(
           icon: const Icon(Icons.copy_outlined),
-          tooltip: L10n.of(context)!.copy,
+          tooltip: L10n.of(context).copy,
           onPressed: controller.copyEventsAction,
         ),
         if (controller.canSaveSelectedEvent)
@@ -51,7 +51,7 @@ class ChatView extends StatelessWidget {
           Builder(
             builder: (context) => IconButton(
               icon: Icon(Icons.adaptive.share),
-              tooltip: L10n.of(context)!.share,
+              tooltip: L10n.of(context).share,
               onPressed: () => controller.saveSelectedEvent(context),
             ),
           ),
@@ -59,12 +59,12 @@ class ChatView extends StatelessWidget {
           IconButton(
             icon: const Icon(Icons.push_pin_outlined),
             onPressed: controller.pinEvent,
-            tooltip: L10n.of(context)!.pinMessage,
+            tooltip: L10n.of(context).pinMessage,
           ),
         if (controller.canRedactSelectedEvents)
           IconButton(
             icon: const Icon(Icons.delete_outlined),
-            tooltip: L10n.of(context)!.redactMessage,
+            tooltip: L10n.of(context).redactMessage,
             onPressed: controller.redactEventsAction,
           ),
         if (controller.selectedEvents.length == 1)
@@ -88,7 +88,7 @@ class ChatView extends StatelessWidget {
                   children: [
                     const Icon(Icons.info_outlined),
                     const SizedBox(width: 12),
-                    Text(L10n.of(context)!.messageInfo),
+                    Text(L10n.of(context).messageInfo),
                   ],
                 ),
               ),
@@ -103,7 +103,7 @@ class ChatView extends StatelessWidget {
                         color: Colors.red,
                       ),
                       const SizedBox(width: 12),
-                      Text(L10n.of(context)!.reportMessage),
+                      Text(L10n.of(context).reportMessage),
                     ],
                   ),
                 ),
@@ -117,7 +117,7 @@ class ChatView extends StatelessWidget {
           IconButton(
             onPressed: controller.onPhoneButtonTap,
             icon: const Icon(Icons.call_outlined),
-            tooltip: L10n.of(context)!.placeCall,
+            tooltip: L10n.of(context).placeCall,
           ),
         EncryptionButton(controller.room),
         ChatSettingsPopupMenu(controller.room, true),
@@ -180,7 +180,7 @@ class ChatView extends StatelessWidget {
                     ? IconButton(
                         icon: const Icon(Icons.close),
                         onPressed: controller.clearSelectedEvents,
-                        tooltip: L10n.of(context)!.close,
+                        tooltip: L10n.of(context).close,
                         color: theme.colorScheme.primary,
                       )
                     : StreamBuilder<Object>(
@@ -213,7 +213,7 @@ class ChatView extends StatelessWidget {
                           ),
                           trailing: TextButton(
                             onPressed: controller.goToNewRoomAction,
-                            child: Text(L10n.of(context)!.goToTheNewRoom),
+                            child: Text(L10n.of(context).goToTheNewRoom),
                           ),
                         ),
                       if (scrollUpBannerEventId != null)
@@ -221,13 +221,13 @@ class ChatView extends StatelessWidget {
                           leading: IconButton(
                             color: theme.colorScheme.onSurfaceVariant,
                             icon: const Icon(Icons.close),
-                            tooltip: L10n.of(context)!.close,
+                            tooltip: L10n.of(context).close,
                             onPressed: () {
                               controller.discardScrollUpBannerEventId();
                               controller.setReadMarker();
                             },
                           ),
-                          title: L10n.of(context)!.jumpToLastReadMessage,
+                          title: L10n.of(context).jumpToLastReadMessage,
                           trailing: TextButton(
                             onPressed: () {
                               controller.scrollToEventId(
@@ -235,7 +235,7 @@ class ChatView extends StatelessWidget {
                               );
                               controller.discardScrollUpBannerEventId();
                             },
-                            child: Text(L10n.of(context)!.jump),
+                            child: Text(L10n.of(context).jump),
                           ),
                         ),
                     ],
@@ -333,7 +333,7 @@ class ChatView extends StatelessWidget {
                                             ),
                                             onPressed: controller.leaveChat,
                                             label: Text(
-                                              L10n.of(context)!.leave,
+                                              L10n.of(context).leave,
                                             ),
                                           ),
                                           TextButton.icon(
@@ -347,7 +347,7 @@ class ChatView extends StatelessWidget {
                                             ),
                                             onPressed: controller.recreateChat,
                                             label: Text(
-                                              L10n.of(context)!.reopenChat,
+                                              L10n.of(context).reopenChat,
                                             ),
                                           ),
                                         ],

lib/pages/chat/encryption_button.dart

@@ -25,8 +25,8 @@ class EncryptionButton extends StatelessWidget {
               : Future.value(EncryptionHealthState.allVerified),
           builder: (BuildContext context, snapshot) => IconButton(
             tooltip: room.encrypted
-                ? L10n.of(context)!.encrypted
-                : L10n.of(context)!.encryptionNotEnabled,
+                ? L10n.of(context).encrypted
+                : L10n.of(context).encryptionNotEnabled,
             icon: Icon(
               room.encrypted ? Icons.lock_outlined : Icons.lock_open_outlined,
               size: 20,

lib/pages/chat/event_info_dialog.dart

@@ -14,7 +14,7 @@ extension EventInfoDialogExtension on Event {
   void showInfoDialog(BuildContext context) => showAdaptiveBottomSheet(
         context: context,
         builder: (context) =>
-            EventInfoDialog(l10n: L10n.of(context)!, event: this),
+            EventInfoDialog(l10n: L10n.of(context), event: this),
       );
 }
 
@@ -40,11 +40,11 @@ class EventInfoDialog extends StatelessWidget {
     final originalSource = event.originalSource;
     return Scaffold(
       appBar: AppBar(
-        title: Text(L10n.of(context)!.messageInfo),
+        title: Text(L10n.of(context).messageInfo),
         leading: IconButton(
           icon: const Icon(Icons.arrow_downward_outlined),
           onPressed: Navigator.of(context, rootNavigator: false).pop,
-          tooltip: L10n.of(context)!.close,
+          tooltip: L10n.of(context).close,
         ),
       ),
       body: ListView(
@@ -56,20 +56,20 @@ class EventInfoDialog extends StatelessWidget {
               client: event.room.client,
               presenceUserId: event.senderId,
             ),
-            title: Text(L10n.of(context)!.sender),
+            title: Text(L10n.of(context).sender),
             subtitle: Text(
               '${event.senderFromMemoryOrFallback.calcDisplayname()} [${event.senderId}]',
             ),
           ),
           ListTile(
-            title: Text('${L10n.of(context)!.time}:'),
+            title: Text('${L10n.of(context).time}:'),
             subtitle: Text(event.originServerTs.localizedTime(context)),
           ),
           ListTile(
-            title: Text('${L10n.of(context)!.status}:'),
+            title: Text('${L10n.of(context).status}:'),
             subtitle: Text(event.status.name),
           ),
-          ListTile(title: Text('${L10n.of(context)!.sourceCode}:')),
+          ListTile(title: Text('${L10n.of(context).sourceCode}:')),
           Padding(
             padding: const EdgeInsets.all(12.0),
             child: Material(
@@ -88,7 +88,7 @@ class EventInfoDialog extends StatelessWidget {
             ),
           ),
           if (originalSource != null) ...[
-            ListTile(title: Text('${L10n.of(context)!.encrypted}:')),
+            ListTile(title: Text('${L10n.of(context).encrypted}:')),
             Padding(
               padding: const EdgeInsets.all(12.0),
               child: Material(

lib/pages/chat/events/cute_events.dart

@@ -72,19 +72,19 @@ class _CuteContentState extends State<CuteContent> {
   generateLabel(User? user) {
     switch (widget.event.content['cute_type']) {
       case 'googly_eyes':
-        return L10n.of(context)?.googlyEyesContent(
+        return L10n.of(context).googlyEyesContent(
           user?.displayName ??
               widget.event.senderFromMemoryOrFallback.displayName ??
               '',
         );
       case 'cuddle':
-        return L10n.of(context)?.cuddleContent(
+        return L10n.of(context).cuddleContent(
           user?.displayName ??
               widget.event.senderFromMemoryOrFallback.displayName ??
               '',
         );
       case 'hug':
-        return L10n.of(context)?.hugContent(
+        return L10n.of(context).hugContent(
           user?.displayName ??
               widget.event.senderFromMemoryOrFallback.displayName ??
               '',

lib/pages/chat/events/message.dart

@@ -484,7 +484,7 @@ class Message extends StatelessWidget {
                     horizontal: 8,
                   ),
                   child: Text(
-                    L10n.of(context)!.readUpToHere,
+                    L10n.of(context).readUpToHere,
                     style: TextStyle(color: theme.colorScheme.primary),
                   ),
                 ),

lib/pages/chat/events/message_content.dart

@@ -38,7 +38,7 @@ class MessageContent extends StatelessWidget {
   });
 
   void _verifyOrRequestKey(BuildContext context) async {
-    final l10n = L10n.of(context)!;
+    final l10n = L10n.of(context);
     if (event.content['can_request_session'] != true) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
@@ -184,7 +184,7 @@ class MessageContent extends StatelessWidget {
               textColor: buttonTextColor,
               onPressed: () => _verifyOrRequestKey(context),
               icon: '🔒',
-              label: L10n.of(context)!.encrypted,
+              label: L10n.of(context).encrypted,
               fontSize: fontSize,
             );
           case MessageTypes.Location:
@@ -213,7 +213,7 @@ class MessageContent extends StatelessWidget {
                       onPressed:
                           UrlLauncher(context, geoUri.toString()).launchUrl,
                       label: Text(
-                        L10n.of(context)!.openInMaps,
+                        L10n.of(context).openInMaps,
                         style: TextStyle(color: textColor),
                       ),
                     ),
@@ -233,11 +233,11 @@ class MessageContent extends StatelessWidget {
                       event.redactedBecause?.content.tryGet<String>('reason');
                   final redactedBy = snapshot.data?.calcDisplayname() ??
                       event.redactedBecause?.senderId.localpart ??
-                      L10n.of(context)!.user;
+                      L10n.of(context).user;
                   return _ButtonContent(
                     label: reason == null
-                        ? L10n.of(context)!.redactedBy(redactedBy)
-                        : L10n.of(context)!.redactedByBecause(
+                        ? L10n.of(context).redactedBy(redactedBy)
+                        : L10n.of(context).redactedByBecause(
                             redactedBy,
                             reason,
                           ),
@@ -254,7 +254,7 @@ class MessageContent extends StatelessWidget {
                 event.numberEmotes <= 10;
             return Linkify(
               text: event.calcLocalizedBodyFallback(
-                MatrixLocals(L10n.of(context)!),
+                MatrixLocals(L10n.of(context)),
                 hideReply: true,
               ),
               style: TextStyle(
@@ -277,7 +277,7 @@ class MessageContent extends StatelessWidget {
           future: event.fetchSenderUser(),
           builder: (context, snapshot) {
             return _ButtonContent(
-              label: L10n.of(context)!.startedACall(
+              label: L10n.of(context).startedACall(
                 snapshot.data?.calcDisplayname() ??
                     event.senderFromMemoryOrFallback.calcDisplayname(),
               ),
@@ -293,7 +293,7 @@ class MessageContent extends StatelessWidget {
           future: event.fetchSenderUser(),
           builder: (context, snapshot) {
             return _ButtonContent(
-              label: L10n.of(context)!.userSentUnknownEvent(
+              label: L10n.of(context).userSentUnknownEvent(
                 snapshot.data?.calcDisplayname() ??
                     event.senderFromMemoryOrFallback.calcDisplayname(),
                 event.type,

lib/pages/chat/events/reply_content.dart

@@ -72,7 +72,7 @@ class ReplyContent extends StatelessWidget {
                 ),
                 Text(
                   displayEvent.calcLocalizedBodyFallback(
-                    MatrixLocals(L10n.of(context)!),
+                    MatrixLocals(L10n.of(context)),
                     withSenderNamePrefix: false,
                     hideReply: true,
                   ),

lib/pages/chat/events/state_message.dart

@@ -21,7 +21,7 @@ class StateMessage extends StatelessWidget {
           padding: const EdgeInsets.all(8),
           child: Text(
             event.calcLocalizedBodyFallback(
-              MatrixLocals(L10n.of(context)!),
+              MatrixLocals(L10n.of(context)),
             ),
             textAlign: TextAlign.center,
             style: TextStyle(

lib/pages/chat/events/verification_request_content.dart

@@ -58,10 +58,10 @@ class VerificationRequestContent extends StatelessWidget {
                 canceled
                     ? 'Error ${cancel.first.content.tryGet<String>('code')}: ${cancel.first.content.tryGet<String>('reason')}'
                     : (fullyDone
-                        ? L10n.of(context)!.verifySuccess
+                        ? L10n.of(context).verifySuccess
                         : (started
-                            ? L10n.of(context)!.loadingPleaseWait
-                            : L10n.of(context)!.newVerificationRequest)),
+                            ? L10n.of(context).loadingPleaseWait
+                            : L10n.of(context).newVerificationRequest)),
               ),
             ],
           ),

lib/pages/chat/events/video_player.dart

@@ -137,8 +137,8 @@ class EventVideoPlayerState extends State<EventVideoPlayer> {
                             )
                           : const Icon(Icons.play_circle_outlined),
                       tooltip: _isDownloading
-                          ? L10n.of(context)!.loadingPleaseWait
-                          : L10n.of(context)!.videoWithSize(
+                          ? L10n.of(context).loadingPleaseWait
+                          : L10n.of(context).videoWithSize(
                               widget.event.sizeString ?? '?MB',
                             ),
                       onPressed: _isDownloading ? null : _downloadAction,

lib/pages/chat/input_bar.dart

@@ -226,7 +226,7 @@ class InputBar extends StatelessWidget {
     const padding = EdgeInsets.all(4.0);
     if (suggestion['type'] == 'command') {
       final command = suggestion['name']!;
-      final hint = commandHint(L10n.of(context)!, command);
+      final hint = commandHint(L10n.of(context), command);
       return Tooltip(
         message: hint,
         waitDuration: const Duration(days: 1), // don't show on hover

lib/pages/chat/pinned_events.dart

@@ -32,13 +32,13 @@ class PinnedEvents extends StatelessWidget {
         ? events.single?.eventId
         : await showConfirmationDialog<String>(
             context: context,
-            title: L10n.of(context)!.pinMessage,
+            title: L10n.of(context).pinMessage,
             actions: events
                 .map(
                   (event) => AlertDialogAction(
                     key: event?.eventId ?? '',
                     label: event?.calcLocalizedBodyFallback(
-                          MatrixLocals(L10n.of(context)!),
+                          MatrixLocals(L10n.of(context)),
                           withSenderNamePrefix: true,
                           hideReply: true,
                         ) ??
@@ -67,17 +67,17 @@ class PinnedEvents extends StatelessWidget {
         final event = snapshot.data;
         return ChatAppBarListTile(
           title: event?.calcLocalizedBodyFallback(
-                MatrixLocals(L10n.of(context)!),
+                MatrixLocals(L10n.of(context)),
                 withSenderNamePrefix: true,
                 hideReply: true,
               ) ??
-              L10n.of(context)!.loadingPleaseWait,
+              L10n.of(context).loadingPleaseWait,
           leading: IconButton(
             splashRadius: 18,
             iconSize: 18,
             color: theme.colorScheme.onSurfaceVariant,
             icon: const Icon(Icons.push_pin),
-            tooltip: L10n.of(context)!.unpin,
+            tooltip: L10n.of(context).unpin,
             onPressed: controller.room.canSendEvent(EventTypes.RoomPinnedEvents)
                 ? () => controller.unpinEvent(event!.eventId)
                 : null,

lib/pages/chat/recording_dialog.dart

@@ -137,7 +137,7 @@ class RecordingDialogState extends State<RecordingDialog> {
     final time =
         '${_duration.inMinutes.toString().padLeft(2, '0')}:${(_duration.inSeconds % 60).toString().padLeft(2, '0')}';
     final content = error
-        ? Text(L10n.of(context)!.oopsSomethingWentWrong)
+        ? Text(L10n.of(context).oopsSomethingWentWrong)
         : Row(
             children: [
               Container(
@@ -185,7 +185,7 @@ class RecordingDialogState extends State<RecordingDialog> {
           CupertinoDialogAction(
             onPressed: () => Navigator.of(context, rootNavigator: false).pop(),
             child: Text(
-              L10n.of(context)!.cancel.toUpperCase(),
+              L10n.of(context).cancel.toUpperCase(),
               style: TextStyle(
                 color: theme.textTheme.bodyMedium?.color?.withAlpha(150),
               ),
@@ -194,7 +194,7 @@ class RecordingDialogState extends State<RecordingDialog> {
           if (error != true)
             CupertinoDialogAction(
               onPressed: _stopAndSend,
-              child: Text(L10n.of(context)!.send.toUpperCase()),
+              child: Text(L10n.of(context).send.toUpperCase()),
             ),
         ],
       );
@@ -205,7 +205,7 @@ class RecordingDialogState extends State<RecordingDialog> {
         TextButton(
           onPressed: () => Navigator.of(context, rootNavigator: false).pop(),
           child: Text(
-            L10n.of(context)!.cancel.toUpperCase(),
+            L10n.of(context).cancel.toUpperCase(),
             style: TextStyle(
               color: theme.textTheme.bodyMedium?.color?.withAlpha(150),
             ),
@@ -217,7 +217,7 @@ class RecordingDialogState extends State<RecordingDialog> {
             child: Row(
               mainAxisSize: MainAxisSize.min,
               children: <Widget>[
-                Text(L10n.of(context)!.send.toUpperCase()),
+                Text(L10n.of(context).send.toUpperCase()),
                 const SizedBox(width: 4),
                 const Icon(Icons.send_outlined, size: 15),
               ],

lib/pages/chat/reply_display.dart

@@ -29,7 +29,7 @@ class ReplyDisplay extends StatelessWidget {
       child: Row(
         children: <Widget>[
           IconButton(
-            tooltip: L10n.of(context)!.close,
+            tooltip: L10n.of(context).close,
             icon: const Icon(Icons.close),
             onPressed: controller.cancelReplyEventAction,
           ),
@@ -71,7 +71,7 @@ class _EditContent extends StatelessWidget {
         Container(width: 15.0),
         Text(
           event.calcLocalizedBodyFallback(
-            MatrixLocals(L10n.of(context)!),
+            MatrixLocals(L10n.of(context)),
             withSenderNamePrefix: false,
             hideReply: true,
           ),

lib/pages/chat/send_file_dialog.dart

@@ -40,7 +40,7 @@ class SendFileDialogState extends State<SendFileDialog> {
 
   Future<void> _send() async {
     final scaffoldMessenger = ScaffoldMessenger.of(widget.outerContext);
-    final l10n = L10n.of(context)!;
+    final l10n = L10n.of(context);
 
     try {
       scaffoldMessenger.showLoadingSnackBar(l10n.prepareSendingAttachment);
@@ -146,7 +146,7 @@ class SendFileDialogState extends State<SendFileDialog> {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
 
-    var sendStr = L10n.of(context)!.sendFile;
+    var sendStr = L10n.of(context).sendFile;
     final uniqueMimeType = widget.files
         .map((file) => file.mimeType ?? lookupMimeType(file.path))
         .toSet()
@@ -154,21 +154,21 @@ class SendFileDialogState extends State<SendFileDialog> {
 
     final fileName = widget.files.length == 1
         ? widget.files.single.name
-        : L10n.of(context)!.countFiles(widget.files.length.toString());
+        : L10n.of(context).countFiles(widget.files.length.toString());
 
     if (uniqueMimeType?.startsWith('image') ?? false) {
-      sendStr = L10n.of(context)!.sendImage;
+      sendStr = L10n.of(context).sendImage;
     } else if (uniqueMimeType?.startsWith('audio') ?? false) {
-      sendStr = L10n.of(context)!.sendAudio;
+      sendStr = L10n.of(context).sendAudio;
     } else if (uniqueMimeType?.startsWith('video') ?? false) {
-      sendStr = L10n.of(context)!.sendVideo;
+      sendStr = L10n.of(context).sendVideo;
     }
 
     return FutureBuilder<String>(
       future: _calcCombinedFileSize(),
       builder: (context, snapshot) {
         final sizeString =
-            snapshot.data ?? L10n.of(context)!.calculatingFileSize;
+            snapshot.data ?? L10n.of(context).calculatingFileSize;
 
         Widget contentWidget;
         if (uniqueMimeType?.startsWith('image') ?? false) {
@@ -210,7 +210,7 @@ class SendFileDialogState extends State<SendFileDialog> {
                       crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
                         Text(
-                          L10n.of(context)!.sendOriginal,
+                          L10n.of(context).sendOriginal,
                           style: const TextStyle(fontWeight: FontWeight.bold),
                         ),
                         Text(sizeString),
@@ -270,7 +270,7 @@ class SendFileDialogState extends State<SendFileDialog> {
                           crossAxisAlignment: CrossAxisAlignment.start,
                           children: [
                             Text(
-                              L10n.of(context)!.sendOriginal,
+                              L10n.of(context).sendOriginal,
                               style:
                                   const TextStyle(fontWeight: FontWeight.bold),
                             ),
@@ -293,11 +293,11 @@ class SendFileDialogState extends State<SendFileDialog> {
                 // just close the dialog
                 Navigator.of(context, rootNavigator: false).pop();
               },
-              child: Text(L10n.of(context)!.cancel),
+              child: Text(L10n.of(context).cancel),
             ),
             TextButton(
               onPressed: _send,
-              child: Text(L10n.of(context)!.send),
+              child: Text(L10n.of(context).send),
             ),
           ],
         );

lib/pages/chat/send_location_dialog.dart

@@ -93,12 +93,12 @@ class SendLocationDialogState extends State<SendLocationDialog> {
         longitude: position!.longitude,
       );
     } else if (disabled) {
-      contentWidget = Text(L10n.of(context)!.locationDisabledNotice);
+      contentWidget = Text(L10n.of(context).locationDisabledNotice);
     } else if (denied) {
-      contentWidget = Text(L10n.of(context)!.locationPermissionDeniedNotice);
+      contentWidget = Text(L10n.of(context).locationPermissionDeniedNotice);
     } else if (error != null) {
       contentWidget =
-          Text(L10n.of(context)!.errorObtainingLocation(error.toString()));
+          Text(L10n.of(context).errorObtainingLocation(error.toString()));
     } else {
       contentWidget = Row(
         mainAxisSize: MainAxisSize.min,
@@ -106,22 +106,22 @@ class SendLocationDialogState extends State<SendLocationDialog> {
         children: [
           const CupertinoActivityIndicator(),
           const SizedBox(width: 12),
-          Text(L10n.of(context)!.obtainingLocation),
+          Text(L10n.of(context).obtainingLocation),
         ],
       );
     }
     return AlertDialog.adaptive(
-      title: Text(L10n.of(context)!.shareLocation),
+      title: Text(L10n.of(context).shareLocation),
       content: contentWidget,
       actions: [
         TextButton(
           onPressed: Navigator.of(context, rootNavigator: false).pop,
-          child: Text(L10n.of(context)!.cancel),
+          child: Text(L10n.of(context).cancel),
         ),
         if (position != null)
           TextButton(
             onPressed: isSending ? null : sendAction,
-            child: Text(L10n.of(context)!.send),
+            child: Text(L10n.of(context).send),
           ),
       ],
     );

lib/pages/chat/sticker_picker_dialog.dart

@@ -117,7 +117,7 @@ class StickerPickerDialogState extends State<StickerPickerDialog> {
                 child: TextField(
                   autofocus: false,
                   decoration: InputDecoration(
-                    hintText: L10n.of(context)!.search,
+                    hintText: L10n.of(context).search,
                     prefixIcon: const Icon(Icons.search_outlined),
                     contentPadding: EdgeInsets.zero,
                   ),
@@ -131,7 +131,7 @@ class StickerPickerDialogState extends State<StickerPickerDialog> {
                   child: Column(
                     mainAxisSize: MainAxisSize.min,
                     children: [
-                      Text(L10n.of(context)!.noEmotesFound),
+                      Text(L10n.of(context).noEmotesFound),
                       const SizedBox(height: 12),
                       OutlinedButton.icon(
                         onPressed: () => UrlLauncher(
@@ -139,7 +139,7 @@ class StickerPickerDialogState extends State<StickerPickerDialog> {
                           'https://matrix.to/#/#fluffychat-stickers:janian.de',
                         ).launchUrl(),
                         icon: const Icon(Icons.explore_outlined),
-                        label: Text(L10n.of(context)!.discover),
+                        label: Text(L10n.of(context).discover),
                       ),
                     ],
                   ),

lib/pages/chat_access_settings/chat_access_settings_controller.dart

@@ -151,7 +151,7 @@ class ChatAccessSettingsController extends State<ChatAccessSettings> {
     if (capabilities == null) return;
     final newVersion = await showConfirmationDialog<String>(
       context: context,
-      title: L10n.of(context)!.replaceRoomWithNewerVersion,
+      title: L10n.of(context).replaceRoomWithNewerVersion,
       actions: capabilities.mRoomVersions!.available.entries
           .where((r) => r.key != roomVersion)
           .map(
@@ -168,10 +168,10 @@ class ChatAccessSettingsController extends State<ChatAccessSettings> {
             await showOkCancelAlertDialog(
               useRootNavigator: false,
               context: context,
-              okLabel: L10n.of(context)!.yes,
-              cancelLabel: L10n.of(context)!.cancel,
-              title: L10n.of(context)!.areYouSure,
-              message: L10n.of(context)!.roomUpgradeDescription,
+              okLabel: L10n.of(context).yes,
+              cancelLabel: L10n.of(context).cancel,
+              title: L10n.of(context).areYouSure,
+              message: L10n.of(context).roomUpgradeDescription,
               isDestructiveAction: true,
             )) {
       return;
@@ -190,12 +190,12 @@ class ChatAccessSettingsController extends State<ChatAccessSettings> {
 
     final input = await showTextInputDialog(
       context: context,
-      title: L10n.of(context)!.editRoomAliases,
+      title: L10n.of(context).editRoomAliases,
       textFields: [
         DialogTextField(
           prefixText: '#',
           suffixText: domain,
-          hintText: L10n.of(context)!.alias,
+          hintText: L10n.of(context).alias,
         ),
       ],
     );
@@ -214,10 +214,10 @@ class ChatAccessSettingsController extends State<ChatAccessSettings> {
 
     final canonicalAliasConsent = await showOkCancelAlertDialog(
       context: context,
-      title: L10n.of(context)!.setAsCanonicalAlias,
+      title: L10n.of(context).setAsCanonicalAlias,
       message: alias,
-      okLabel: L10n.of(context)!.yes,
-      cancelLabel: L10n.of(context)!.no,
+      okLabel: L10n.of(context).yes,
+      cancelLabel: L10n.of(context).no,
     );
 
     final altAliases = room

lib/pages/chat_access_settings/chat_access_settings_page.dart

@@ -20,7 +20,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.accessAndVisibility),
+        title: Text(L10n.of(context).accessAndVisibility),
       ),
       body: MaxWidthBody(
         child: StreamBuilder<Object>(
@@ -38,7 +38,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
               children: [
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.visibilityOfTheChatHistory,
+                    L10n.of(context).visibilityOfTheChatHistory,
                     style: TextStyle(
                       color: theme.colorScheme.secondary,
                       fontWeight: FontWeight.bold,
@@ -49,7 +49,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                   RadioListTile<HistoryVisibility>.adaptive(
                     title: Text(
                       historyVisibility
-                          .getLocalizedString(MatrixLocals(L10n.of(context)!)),
+                          .getLocalizedString(MatrixLocals(L10n.of(context))),
                     ),
                     value: historyVisibility,
                     groupValue: room.historyVisibility,
@@ -61,7 +61,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                 Divider(color: theme.dividerColor),
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.whoIsAllowedToJoinThisGroup,
+                    L10n.of(context).whoIsAllowedToJoinThisGroup,
                     style: TextStyle(
                       color: theme.colorScheme.secondary,
                       fontWeight: FontWeight.bold,
@@ -72,7 +72,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                   if (joinRule != JoinRules.private)
                     RadioListTile<JoinRules>.adaptive(
                       title: Text(
-                        joinRule.localizedString(L10n.of(context)!),
+                        joinRule.localizedString(L10n.of(context)),
                       ),
                       value: joinRule,
                       groupValue: room.joinRules,
@@ -86,7 +86,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                     .contains(room.joinRules)) ...[
                   ListTile(
                     title: Text(
-                      L10n.of(context)!.areGuestsAllowedToJoin,
+                      L10n.of(context).areGuestsAllowedToJoin,
                       style: TextStyle(
                         color: theme.colorScheme.secondary,
                         fontWeight: FontWeight.bold,
@@ -97,7 +97,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                     RadioListTile<GuestAccess>.adaptive(
                       title: Text(
                         guestAccess.getLocalizedString(
-                          MatrixLocals(L10n.of(context)!),
+                          MatrixLocals(L10n.of(context)),
                         ),
                       ),
                       value: guestAccess,
@@ -110,7 +110,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                   Divider(color: theme.dividerColor),
                   ListTile(
                     title: Text(
-                      L10n.of(context)!.publicChatAddresses,
+                      L10n.of(context).publicChatAddresses,
                       style: TextStyle(
                         color: theme.colorScheme.secondary,
                         fontWeight: FontWeight.bold,
@@ -118,7 +118,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                     ),
                     trailing: IconButton(
                       icon: const Icon(Icons.add_outlined),
-                      tooltip: L10n.of(context)!.createNewAddress,
+                      tooltip: L10n.of(context).createNewAddress,
                       onPressed: controller.addAlias,
                     ),
                   ),
@@ -171,7 +171,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                     builder: (context, snapshot) => SwitchListTile.adaptive(
                       value: snapshot.data == Visibility.public,
                       title: Text(
-                        L10n.of(context)!.chatCanBeDiscoveredViaSearchOnServer(
+                        L10n.of(context).chatCanBeDiscoveredViaSearchOnServer(
                           room.client.userID!.domain!,
                         ),
                       ),
@@ -180,7 +180,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                   ),
                 ],
                 ListTile(
-                  title: Text(L10n.of(context)!.globalChatId),
+                  title: Text(L10n.of(context).globalChatId),
                   subtitle: SelectableText(room.id),
                   trailing: IconButton(
                     icon: const Icon(Icons.copy_outlined),
@@ -188,7 +188,7 @@ class ChatAccessSettingsPageView extends StatelessWidget {
                   ),
                 ),
                 ListTile(
-                  title: Text(L10n.of(context)!.roomVersion),
+                  title: Text(L10n.of(context).roomVersion),
                   subtitle: SelectableText(
                     room
                             .getState(EventTypes.RoomCreate)!

lib/pages/chat_details/chat_details.dart

@@ -43,14 +43,14 @@ class ChatDetailsController extends State<ChatDetails> {
     final room = Matrix.of(context).client.getRoomById(roomId!)!;
     final input = await showTextInputDialog(
       context: context,
-      title: L10n.of(context)!.changeTheNameOfTheGroup,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).changeTheNameOfTheGroup,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
           initialText: room.getLocalizedDisplayname(
             MatrixLocals(
-              L10n.of(context)!,
+              L10n.of(context),
             ),
           ),
         ),
@@ -63,7 +63,7 @@ class ChatDetailsController extends State<ChatDetails> {
     );
     if (success.error == null) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(L10n.of(context)!.displaynameHasBeenChanged)),
+        SnackBar(content: Text(L10n.of(context).displaynameHasBeenChanged)),
       );
     }
   }
@@ -72,12 +72,12 @@ class ChatDetailsController extends State<ChatDetails> {
     final room = Matrix.of(context).client.getRoomById(roomId!)!;
     final input = await showTextInputDialog(
       context: context,
-      title: L10n.of(context)!.setChatDescription,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).setChatDescription,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
-          hintText: L10n.of(context)!.noChatDescriptionYet,
+          hintText: L10n.of(context).noChatDescriptionYet,
           initialText: room.topic,
           minLines: 4,
           maxLines: 8,
@@ -92,7 +92,7 @@ class ChatDetailsController extends State<ChatDetails> {
     if (success.error == null) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
-          content: Text(L10n.of(context)!.chatDescriptionHasBeenChanged),
+          content: Text(L10n.of(context).chatDescriptionHasBeenChanged),
         ),
       );
     }
@@ -118,19 +118,19 @@ class ChatDetailsController extends State<ChatDetails> {
       if (PlatformInfos.isMobile)
         SheetAction(
           key: AvatarAction.camera,
-          label: L10n.of(context)!.openCamera,
+          label: L10n.of(context).openCamera,
           isDefaultAction: true,
           icon: Icons.camera_alt_outlined,
         ),
       SheetAction(
         key: AvatarAction.file,
-        label: L10n.of(context)!.openGallery,
+        label: L10n.of(context).openGallery,
         icon: Icons.photo_outlined,
       ),
       if (room?.avatar != null)
         SheetAction(
           key: AvatarAction.remove,
-          label: L10n.of(context)!.delete,
+          label: L10n.of(context).delete,
           isDestructiveAction: true,
           icon: Icons.delete_outlined,
         ),
@@ -139,7 +139,7 @@ class ChatDetailsController extends State<ChatDetails> {
         ? actions.single.key
         : await showModalActionSheet<AvatarAction>(
             context: context,
-            title: L10n.of(context)!.editRoomAvatar,
+            title: L10n.of(context).editRoomAvatar,
             actions: actions,
           );
     if (action == null) return;

lib/pages/chat_details/chat_details_view.dart

@@ -29,10 +29,10 @@ class ChatDetailsView extends StatelessWidget {
     if (room == null) {
       return Scaffold(
         appBar: AppBar(
-          title: Text(L10n.of(context)!.oopsSomethingWentWrong),
+          title: Text(L10n.of(context).oopsSomethingWentWrong),
         ),
         body: Center(
-          child: Text(L10n.of(context)!.youAreNoLongerParticipatingInThisChat),
+          child: Text(L10n.of(context).youAreNoLongerParticipatingInThisChat),
         ),
       );
     }
@@ -49,7 +49,7 @@ class ChatDetailsView extends StatelessWidget {
         final canRequestMoreMembers = members.length < actualMembersCount;
         final iconColor = theme.textTheme.bodyLarge!.color;
         final displayname = room.getLocalizedDisplayname(
-          MatrixLocals(L10n.of(context)!),
+          MatrixLocals(L10n.of(context)),
         );
         return Scaffold(
           appBar: AppBar(
@@ -59,7 +59,7 @@ class ChatDetailsView extends StatelessWidget {
             actions: <Widget>[
               if (room.canonicalAlias.isNotEmpty)
                 IconButton(
-                  tooltip: L10n.of(context)!.share,
+                  tooltip: L10n.of(context).share,
                   icon: Icon(Icons.adaptive.share_outlined),
                   onPressed: () => FluffyShare.share(
                     AppConfig.inviteLinkPrefix + room.canonicalAlias,
@@ -69,7 +69,7 @@ class ChatDetailsView extends StatelessWidget {
               if (controller.widget.embeddedCloseButton == null)
                 ChatSettingsPopupMenu(room, false),
             ],
-            title: Text(L10n.of(context)!.chatDetails),
+            title: Text(L10n.of(context).chatDetails),
             backgroundColor: theme.appBarTheme.backgroundColor,
           ),
           body: MaxWidthBody(
@@ -150,7 +150,7 @@ class ChatDetailsView extends StatelessWidget {
                                     ),
                                     label: Text(
                                       room.isDirectChat
-                                          ? L10n.of(context)!.directChat
+                                          ? L10n.of(context).directChat
                                           : displayname,
                                       maxLines: 1,
                                       overflow: TextOverflow.ellipsis,
@@ -172,7 +172,7 @@ class ChatDetailsView extends StatelessWidget {
                                           theme.colorScheme.secondary,
                                     ),
                                     label: Text(
-                                      L10n.of(context)!.countParticipants(
+                                      L10n.of(context).countParticipants(
                                         actualMembersCount,
                                       ),
                                       maxLines: 1,
@@ -189,7 +189,7 @@ class ChatDetailsView extends StatelessWidget {
                         if (!room.canChangeStateEvent(EventTypes.RoomTopic))
                           ListTile(
                             title: Text(
-                              L10n.of(context)!.chatDescription,
+                              L10n.of(context).chatDescription,
                               style: TextStyle(
                                 color: theme.colorScheme.secondary,
                                 fontWeight: FontWeight.bold,
@@ -201,7 +201,7 @@ class ChatDetailsView extends StatelessWidget {
                             padding: const EdgeInsets.all(16.0),
                             child: TextButton.icon(
                               onPressed: controller.setTopicAction,
-                              label: Text(L10n.of(context)!.setChatDescription),
+                              label: Text(L10n.of(context).setChatDescription),
                               icon: const Icon(Icons.edit_outlined),
                               style: TextButton.styleFrom(
                                 backgroundColor:
@@ -217,7 +217,7 @@ class ChatDetailsView extends StatelessWidget {
                           ),
                           child: SelectableLinkify(
                             text: room.topic.isEmpty
-                                ? L10n.of(context)!.noChatDescriptionYet
+                                ? L10n.of(context).noChatDescriptionYet
                                 : room.topic,
                             options: const LinkifyOptions(humanize: false),
                             linkStyle: const TextStyle(
@@ -247,9 +247,8 @@ class ChatDetailsView extends StatelessWidget {
                               Icons.insert_emoticon_outlined,
                             ),
                           ),
-                          title:
-                              Text(L10n.of(context)!.customEmojisAndStickers),
-                          subtitle: Text(L10n.of(context)!.setCustomEmotes),
+                          title: Text(L10n.of(context).customEmojisAndStickers),
+                          subtitle: Text(L10n.of(context).setCustomEmotes),
                           onTap: controller.goToEmoteSettings,
                           trailing: const Icon(Icons.chevron_right_outlined),
                         ),
@@ -261,10 +260,10 @@ class ChatDetailsView extends StatelessWidget {
                               child: const Icon(Icons.shield_outlined),
                             ),
                             title: Text(
-                              L10n.of(context)!.accessAndVisibility,
+                              L10n.of(context).accessAndVisibility,
                             ),
                             subtitle: Text(
-                              L10n.of(context)!.accessAndVisibilityDescription,
+                              L10n.of(context).accessAndVisibilityDescription,
                             ),
                             onTap: () => context
                                 .push('/rooms/${room.id}/details/access'),
@@ -272,9 +271,9 @@ class ChatDetailsView extends StatelessWidget {
                           ),
                         if (!room.isDirectChat)
                           ListTile(
-                            title: Text(L10n.of(context)!.chatPermissions),
+                            title: Text(L10n.of(context).chatPermissions),
                             subtitle: Text(
-                              L10n.of(context)!.whoCanPerformWhichAction,
+                              L10n.of(context).whoCanPerformWhichAction,
                             ),
                             leading: CircleAvatar(
                               backgroundColor: theme.scaffoldBackgroundColor,
@@ -290,7 +289,7 @@ class ChatDetailsView extends StatelessWidget {
                         Divider(color: theme.dividerColor),
                         ListTile(
                           title: Text(
-                            L10n.of(context)!.countParticipants(
+                            L10n.of(context).countParticipants(
                               actualMembersCount.toString(),
                             ),
                             style: TextStyle(
@@ -301,7 +300,7 @@ class ChatDetailsView extends StatelessWidget {
                         ),
                         if (!room.isDirectChat && room.canInvite)
                           ListTile(
-                            title: Text(L10n.of(context)!.inviteContact),
+                            title: Text(L10n.of(context).inviteContact),
                             leading: CircleAvatar(
                               backgroundColor:
                                   theme.colorScheme.primaryContainer,
@@ -319,7 +318,7 @@ class ChatDetailsView extends StatelessWidget {
                       ? ParticipantListItem(members[i - 1])
                       : ListTile(
                           title: Text(
-                            L10n.of(context)!.loadCountMoreParticipants(
+                            L10n.of(context).loadCountMoreParticipants(
                               (actualMembersCount - members.length).toString(),
                             ),
                           ),

lib/pages/chat_details/participant_list_item.dart

@@ -17,17 +17,17 @@ class ParticipantListItem extends StatelessWidget {
     final theme = Theme.of(context);
 
     final membershipBatch = switch (user.membership) {
-      Membership.ban => L10n.of(context)!.banned,
-      Membership.invite => L10n.of(context)!.invited,
+      Membership.ban => L10n.of(context).banned,
+      Membership.invite => L10n.of(context).invited,
       Membership.join => null,
-      Membership.knock => L10n.of(context)!.knocking,
-      Membership.leave => L10n.of(context)!.leftTheChat,
+      Membership.knock => L10n.of(context).knocking,
+      Membership.leave => L10n.of(context).leftTheChat,
     };
 
     final permissionBatch = user.powerLevel == 100
-        ? L10n.of(context)!.admin
+        ? L10n.of(context).admin
         : user.powerLevel >= 50
-            ? L10n.of(context)!.moderator
+            ? L10n.of(context).moderator
             : '';
 
     return Opacity(

lib/pages/chat_encryption_settings/chat_encryption_settings.dart

@@ -34,33 +34,33 @@ class ChatEncryptionSettingsController extends State<ChatEncryptionSettings> {
     if (room.encrypted) {
       showOkAlertDialog(
         context: context,
-        title: L10n.of(context)!.sorryThatsNotPossible,
-        message: L10n.of(context)!.disableEncryptionWarning,
+        title: L10n.of(context).sorryThatsNotPossible,
+        message: L10n.of(context).disableEncryptionWarning,
       );
       return;
     }
     if (room.joinRules == JoinRules.public) {
       showOkAlertDialog(
         context: context,
-        title: L10n.of(context)!.sorryThatsNotPossible,
-        message: L10n.of(context)!.noEncryptionForPublicRooms,
+        title: L10n.of(context).sorryThatsNotPossible,
+        message: L10n.of(context).noEncryptionForPublicRooms,
       );
       return;
     }
     if (!room.canChangeStateEvent(EventTypes.Encryption)) {
       showOkAlertDialog(
         context: context,
-        title: L10n.of(context)!.sorryThatsNotPossible,
-        message: L10n.of(context)!.noPermission,
+        title: L10n.of(context).sorryThatsNotPossible,
+        message: L10n.of(context).noPermission,
       );
       return;
     }
     final consent = await showOkCancelAlertDialog(
       context: context,
-      title: L10n.of(context)!.areYouSure,
-      message: L10n.of(context)!.enableEncryptionWarning,
-      okLabel: L10n.of(context)!.yes,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).areYouSure,
+      message: L10n.of(context).enableEncryptionWarning,
+      okLabel: L10n.of(context).yes,
+      cancelLabel: L10n.of(context).cancel,
     );
     if (consent != OkCancelResult.ok) return;
     await showFutureLoadingDialog(
@@ -72,10 +72,10 @@ class ChatEncryptionSettingsController extends State<ChatEncryptionSettings> {
   void startVerification() async {
     final consent = await showOkCancelAlertDialog(
       context: context,
-      title: L10n.of(context)!.verifyOtherUser,
-      message: L10n.of(context)!.verifyOtherUserDescription,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).verifyOtherUser,
+      message: L10n.of(context).verifyOtherUserDescription,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       fullyCapitalizedForMaterial: false,
     );
     if (consent != OkCancelResult.ok) return;

lib/pages/chat_encryption_settings/chat_encryption_settings_view.dart

@@ -31,11 +31,11 @@ class ChatEncryptionSettingsView extends StatelessWidget {
             icon: const Icon(Icons.close_outlined),
             onPressed: () => context.go('/rooms/${controller.roomId!}'),
           ),
-          title: Text(L10n.of(context)!.encryption),
+          title: Text(L10n.of(context).encryption),
           actions: [
             TextButton(
               onPressed: () => launchUrlString(AppConfig.encryptionTutorial),
-              child: Text(L10n.of(context)!.help),
+              child: Text(L10n.of(context).help),
             ),
           ],
         ),
@@ -49,7 +49,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                   backgroundColor: theme.colorScheme.primaryContainer,
                   child: const Icon(Icons.lock_outlined),
                 ),
-                title: Text(L10n.of(context)!.encryptThisChat),
+                title: Text(L10n.of(context).encryptThisChat),
                 value: room.encrypted,
                 onChanged: controller.enableEncryption,
               ),
@@ -67,7 +67,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                     child: ElevatedButton.icon(
                       onPressed: controller.startVerification,
                       icon: const Icon(Icons.verified_outlined),
-                      label: Text(L10n.of(context)!.verifyStart),
+                      label: Text(L10n.of(context).verifyStart),
                     ),
                   ),
                 ),
@@ -75,7 +75,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                 const SizedBox(height: 16),
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.deviceKeys,
+                    L10n.of(context).deviceKeys,
                     style: const TextStyle(
                       fontWeight: FontWeight.bold,
                     ),
@@ -91,7 +91,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                       if (snapshot.hasError) {
                         return Center(
                           child: Text(
-                            '${L10n.of(context)!.oopsSomethingWentWrong}: ${snapshot.error}',
+                            '${L10n.of(context).oopsSomethingWentWrong}: ${snapshot.error}',
                           ),
                         );
                       }
@@ -133,7 +133,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                               const SizedBox(width: 4),
                               Text(
                                 deviceKeys[i].deviceId ??
-                                    L10n.of(context)!.unknownDevice,
+                                    L10n.of(context).unknownDevice,
                               ),
                               const SizedBox(width: 4),
                               Flexible(
@@ -167,7 +167,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                           ),
                           subtitle: Text(
                             deviceKeys[i].ed25519Key?.beautified ??
-                                L10n.of(context)!.unknownEncryptionAlgorithm,
+                                L10n.of(context).unknownEncryptionAlgorithm,
                             style: TextStyle(
                               fontFamily: 'RobotoMono',
                               color: theme.colorScheme.secondary,
@@ -183,7 +183,7 @@ class ChatEncryptionSettingsView extends StatelessWidget {
                   padding: const EdgeInsets.all(16.0),
                   child: Center(
                     child: Text(
-                      L10n.of(context)!.encryptionNotEnabled,
+                      L10n.of(context).encryptionNotEnabled,
                       style: const TextStyle(
                         fontStyle: FontStyle.italic,
                       ),

lib/pages/chat_list/chat_list.dart

@@ -62,15 +62,15 @@ extension LocalizedActiveFilter on ActiveFilter {
   String toLocalizedString(BuildContext context) {
     switch (this) {
       case ActiveFilter.allChats:
-        return L10n.of(context)!.all;
+        return L10n.of(context).all;
       case ActiveFilter.messages:
-        return L10n.of(context)!.messages;
+        return L10n.of(context).messages;
       case ActiveFilter.unread:
-        return L10n.of(context)!.unread;
+        return L10n.of(context).unread;
       case ActiveFilter.groups:
-        return L10n.of(context)!.groups;
+        return L10n.of(context).groups;
       case ActiveFilter.spaces:
-        return L10n.of(context)!.spaces;
+        return L10n.of(context).spaces;
     }
   }
 }
@@ -128,25 +128,25 @@ class ChatListController extends State<ChatList>
       final inviteAction = await showModalActionSheet<InviteActions>(
         context: context,
         message: room.isDirectChat
-            ? L10n.of(context)!.invitePrivateChat
-            : L10n.of(context)!.inviteGroupChat,
-        title: room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)!)),
+            ? L10n.of(context).invitePrivateChat
+            : L10n.of(context).inviteGroupChat,
+        title: room.getLocalizedDisplayname(MatrixLocals(L10n.of(context))),
         actions: [
           SheetAction(
             key: InviteActions.accept,
-            label: L10n.of(context)!.accept,
+            label: L10n.of(context).accept,
             icon: Icons.check_outlined,
             isDefaultAction: true,
           ),
           SheetAction(
             key: InviteActions.decline,
-            label: L10n.of(context)!.decline,
+            label: L10n.of(context).decline,
             icon: Icons.close_outlined,
             isDestructiveAction: true,
           ),
           SheetAction(
             key: InviteActions.block,
-            label: L10n.of(context)!.block,
+            label: L10n.of(context).block,
             icon: Icons.block_outlined,
             isDestructiveAction: true,
           ),
@@ -181,7 +181,7 @@ class ChatListController extends State<ChatList>
     if (room.membership == Membership.ban) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
-          content: Text(L10n.of(context)!.youHaveBeenBannedFromThisChat),
+          content: Text(L10n.of(context).youHaveBeenBannedFromThisChat),
         ),
       );
       return;
@@ -221,12 +221,12 @@ class ChatListController extends State<ChatList>
       } else {
         final consent = await showOkCancelAlertDialog(
           context: context,
-          title: L10n.of(context)!.forward,
-          message: L10n.of(context)!.forwardMessageTo(
-            room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)!)),
+          title: L10n.of(context).forward,
+          message: L10n.of(context).forwardMessageTo(
+            room.getLocalizedDisplayname(MatrixLocals(L10n.of(context))),
           ),
-          okLabel: L10n.of(context)!.forward,
-          cancelLabel: L10n.of(context)!.cancel,
+          okLabel: L10n.of(context).forward,
+          cancelLabel: L10n.of(context).cancel,
         );
         if (consent == OkCancelResult.cancel) {
           Matrix.of(context).shareContent = null;
@@ -276,10 +276,10 @@ class ChatListController extends State<ChatList>
   void setServer() async {
     final newServer = await showTextInputDialog(
       useRootNavigator: false,
-      title: L10n.of(context)!.changeTheHomeserver,
+      title: L10n.of(context).changeTheHomeserver,
       context: context,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
           prefixText: 'https://',
@@ -289,7 +289,7 @@ class ChatListController extends State<ChatList>
           autocorrect: false,
           validator: (server) => server?.contains('.') == true
               ? null
-              : L10n.of(context)!.invalidServerName,
+              : L10n.of(context).invalidServerName,
         ),
       ],
     );
@@ -569,7 +569,7 @@ class ChatListController extends State<ChatList>
     );
 
     final displayname =
-        room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)!));
+        room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)));
 
     final spacesWithPowerLevels = room.client.rooms
         .where(
@@ -618,8 +618,7 @@ class ChatListController extends State<ChatList>
                 const SizedBox(width: 12),
                 Expanded(
                   child: Text(
-                    L10n.of(context)!
-                        .goToSpace(space.getLocalizedDisplayname()),
+                    L10n.of(context).goToSpace(space.getLocalizedDisplayname()),
                   ),
                 ),
               ],
@@ -638,8 +637,8 @@ class ChatListController extends State<ChatList>
               const SizedBox(width: 12),
               Text(
                 room.pushRuleState == PushRuleState.notify
-                    ? L10n.of(context)!.muteChat
-                    : L10n.of(context)!.unmuteChat,
+                    ? L10n.of(context).muteChat
+                    : L10n.of(context).unmuteChat,
               ),
             ],
           ),
@@ -657,8 +656,8 @@ class ChatListController extends State<ChatList>
               const SizedBox(width: 12),
               Text(
                 room.markedUnread
-                    ? L10n.of(context)!.markAsRead
-                    : L10n.of(context)!.markAsUnread,
+                    ? L10n.of(context).markAsRead
+                    : L10n.of(context).markAsUnread,
               ),
             ],
           ),
@@ -672,8 +671,8 @@ class ChatListController extends State<ChatList>
               const SizedBox(width: 12),
               Text(
                 room.isFavourite
-                    ? L10n.of(context)!.unpin
-                    : L10n.of(context)!.pin,
+                    ? L10n.of(context).unpin
+                    : L10n.of(context).pin,
               ),
             ],
           ),
@@ -686,7 +685,7 @@ class ChatListController extends State<ChatList>
               children: [
                 const Icon(Icons.group_work_outlined),
                 const SizedBox(width: 12),
-                Text(L10n.of(context)!.addToSpace),
+                Text(L10n.of(context).addToSpace),
               ],
             ),
           ),
@@ -697,7 +696,7 @@ class ChatListController extends State<ChatList>
             children: [
               const Icon(Icons.delete_outlined),
               const SizedBox(width: 12),
-              Text(L10n.of(context)!.leave),
+              Text(L10n.of(context).leave),
             ],
           ),
         ),
@@ -740,10 +739,10 @@ class ChatListController extends State<ChatList>
         final confirmed = await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.areYouSure,
-          okLabel: L10n.of(context)!.leave,
-          cancelLabel: L10n.of(context)!.no,
-          message: L10n.of(context)!.archiveRoomDescription,
+          title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).leave,
+          cancelLabel: L10n.of(context).no,
+          message: L10n.of(context).archiveRoomDescription,
           isDestructiveAction: true,
         );
         if (confirmed == OkCancelResult.cancel) return;
@@ -755,13 +754,13 @@ class ChatListController extends State<ChatList>
       case ChatContextAction.addToSpace:
         final space = await showConfirmationDialog(
           context: context,
-          title: L10n.of(context)!.space,
+          title: L10n.of(context).space,
           actions: spacesWithPowerLevels
               .map(
                 (space) => AlertDialogAction(
                   key: space,
                   label: space
-                      .getLocalizedDisplayname(MatrixLocals(L10n.of(context)!)),
+                      .getLocalizedDisplayname(MatrixLocals(L10n.of(context))),
                 ),
               )
               .toList(),
@@ -776,7 +775,7 @@ class ChatListController extends State<ChatList>
 
   void dismissStatusList() async {
     final result = await showOkCancelAlertDialog(
-      title: L10n.of(context)!.hidePresences,
+      title: L10n.of(context).hidePresences,
       context: context,
     );
     if (result == OkCancelResult.ok) {
@@ -792,13 +791,13 @@ class ChatListController extends State<ChatList>
     final input = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.setStatus,
-      message: L10n.of(context)!.leaveEmptyToClearStatus,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).setStatus,
+      message: L10n.of(context).leaveEmptyToClearStatus,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
-          hintText: L10n.of(context)!.statusExampleMessage,
+          hintText: L10n.of(context).statusExampleMessage,
           maxLines: 6,
           minLines: 1,
           maxLength: 255,
@@ -880,22 +879,22 @@ class ChatListController extends State<ChatList>
   }
 
   void editBundlesForAccount(String? userId, String? activeBundle) async {
-    final l10n = L10n.of(context)!;
+    final l10n = L10n.of(context);
     final client = Matrix.of(context)
         .widget
         .clients[Matrix.of(context).getClientIndexByMatrixId(userId!)];
     final action = await showConfirmationDialog<EditBundleAction>(
       context: context,
-      title: L10n.of(context)!.editBundlesForAccount,
+      title: L10n.of(context).editBundlesForAccount,
       actions: [
         AlertDialogAction(
           key: EditBundleAction.addToBundle,
-          label: L10n.of(context)!.addToBundle,
+          label: L10n.of(context).addToBundle,
         ),
         if (activeBundle != client.userID)
           AlertDialogAction(
             key: EditBundleAction.removeFromBundle,
-            label: L10n.of(context)!.removeFromBundle,
+            label: L10n.of(context).removeFromBundle,
           ),
       ],
     );

lib/pages/chat_list/chat_list_body.dart

@@ -83,17 +83,17 @@ class ChatListViewBody extends StatelessWidget {
                   [
                     if (controller.isSearchMode) ...[
                       SearchTitle(
-                        title: L10n.of(context)!.publicRooms,
+                        title: L10n.of(context).publicRooms,
                         icon: const Icon(Icons.explore_outlined),
                       ),
                       PublicRoomsHorizontalList(publicRooms: publicRooms),
                       SearchTitle(
-                        title: L10n.of(context)!.publicSpaces,
+                        title: L10n.of(context).publicSpaces,
                         icon: const Icon(Icons.workspaces_outlined),
                       ),
                       PublicRoomsHorizontalList(publicRooms: publicSpaces),
                       SearchTitle(
-                        title: L10n.of(context)!.users,
+                        title: L10n.of(context).users,
                         icon: const Icon(Icons.group_outlined),
                       ),
                       AnimatedContainer(
@@ -115,7 +115,7 @@ class ChatListViewBody extends StatelessWidget {
                                       userSearchResult.results[i].displayName ??
                                           userSearchResult
                                               .results[i].userId.localpart ??
-                                          L10n.of(context)!.unknownDevice,
+                                          L10n.of(context).unknownDevice,
                                   avatar: userSearchResult.results[i].avatarUrl,
                                   onPressed: () => showAdaptiveBottomSheet(
                                     context: context,
@@ -146,8 +146,8 @@ class ChatListViewBody extends StatelessWidget {
                         color: theme.colorScheme.surface,
                         child: ListTile(
                           leading: const Icon(Icons.vpn_key),
-                          title: Text(L10n.of(context)!.dehydrateTor),
-                          subtitle: Text(L10n.of(context)!.dehydrateTorLong),
+                          title: Text(L10n.of(context).dehydrateTor),
+                          subtitle: Text(L10n.of(context).dehydrateTorLong),
                           trailing: const Icon(Icons.chevron_right_outlined),
                           onTap: controller.dehydrate,
                         ),
@@ -231,7 +231,7 @@ class ChatListViewBody extends StatelessWidget {
                       ),
                     if (controller.isSearchMode)
                       SearchTitle(
-                        title: L10n.of(context)!.chats,
+                        title: L10n.of(context).chats,
                         icon: const Icon(Icons.forum_outlined),
                       ),
                     if (client.prevBatch != null &&
@@ -267,8 +267,8 @@ class ChatListViewBody extends StatelessWidget {
                             padding: const EdgeInsets.all(16.0),
                             child: Text(
                               client.rooms.isEmpty
-                                  ? L10n.of(context)!.noChatsFoundHere
-                                  : L10n.of(context)!.noMoreChatsFound,
+                                  ? L10n.of(context).noChatsFoundHere
+                                  : L10n.of(context).noMoreChatsFound,
                               textAlign: TextAlign.center,
                               style: TextStyle(
                                 fontSize: 18,
@@ -343,7 +343,7 @@ class PublicRoomsHorizontalList extends StatelessWidget {
               itemBuilder: (context, i) => _SearchItem(
                 title: publicRooms[i].name ??
                     publicRooms[i].canonicalAlias?.localpart ??
-                    L10n.of(context)!.group,
+                    L10n.of(context).group,
                 avatar: publicRooms[i].avatarUrl,
                 onPressed: () => showAdaptiveBottomSheet(
                   context: context,

lib/pages/chat_list/chat_list_header.dart

@@ -35,14 +35,14 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
       leading: selectMode == SelectMode.normal
           ? null
           : IconButton(
-              tooltip: L10n.of(context)!.cancel,
+              tooltip: L10n.of(context).cancel,
               icon: const Icon(Icons.close_outlined),
               onPressed: controller.cancelAction,
               color: theme.colorScheme.primary,
             ),
       title: selectMode == SelectMode.share
           ? Text(
-              L10n.of(context)!.share,
+              L10n.of(context).share,
               key: const ValueKey(SelectMode.share),
             )
           : TextField(
@@ -61,7 +61,7 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
                   borderRadius: BorderRadius.circular(99),
                 ),
                 contentPadding: EdgeInsets.zero,
-                hintText: L10n.of(context)!.searchChatsRooms,
+                hintText: L10n.of(context).searchChatsRooms,
                 hintStyle: TextStyle(
                   color: theme.colorScheme.onPrimaryContainer,
                   fontWeight: FontWeight.normal,
@@ -69,7 +69,7 @@ class ChatListHeader extends StatelessWidget implements PreferredSizeWidget {
                 floatingLabelBehavior: FloatingLabelBehavior.never,
                 prefixIcon: controller.isSearchMode
                     ? IconButton(
-                        tooltip: L10n.of(context)!.cancel,
+                        tooltip: L10n.of(context).cancel,
                         icon: const Icon(Icons.close_outlined),
                         onPressed: controller.cancelSearch,
                         color: theme.colorScheme.onPrimaryContainer,

lib/pages/chat_list/chat_list_item.dart

@@ -47,10 +47,10 @@ class ChatListItem extends StatelessWidget {
       final confirmed = await showOkCancelAlertDialog(
         useRootNavigator: false,
         context: context,
-        title: L10n.of(context)!.areYouSure,
-        okLabel: L10n.of(context)!.yes,
-        cancelLabel: L10n.of(context)!.no,
-        message: L10n.of(context)!.archiveRoomDescription,
+        title: L10n.of(context).areYouSure,
+        okLabel: L10n.of(context).yes,
+        cancelLabel: L10n.of(context).no,
+        message: L10n.of(context).archiveRoomDescription,
       );
       if (confirmed == OkCancelResult.cancel) return;
       await showFutureLoadingDialog(
@@ -81,7 +81,7 @@ class ChatListItem extends StatelessWidget {
     final backgroundColor =
         activeChat ? theme.colorScheme.secondaryContainer : null;
     final displayname = room.getLocalizedDisplayname(
-      MatrixLocals(L10n.of(context)!),
+      MatrixLocals(L10n.of(context)),
     );
     final filter = this.filter;
     if (filter != null && !displayname.toLowerCase().contains(filter)) {
@@ -272,7 +272,7 @@ class ChatListItem extends StatelessWidget {
                   Expanded(
                     child: room.isSpace && room.membership == Membership.join
                         ? Text(
-                            L10n.of(context)!.countChatsAndCountParticipants(
+                            L10n.of(context).countChatsAndCountParticipants(
                               room.spaceChildren.length.toString(),
                               (room.summary.mJoinedMemberCount ?? 1).toString(),
                             ),
@@ -292,7 +292,7 @@ class ChatListItem extends StatelessWidget {
                                 ),
                                 future: needLastEventSender
                                     ? lastEvent.calcLocalizedBody(
-                                        MatrixLocals(L10n.of(context)!),
+                                        MatrixLocals(L10n.of(context)),
                                         hideReply: true,
                                         hideEdit: true,
                                         plaintextBody: true,
@@ -304,7 +304,7 @@ class ChatListItem extends StatelessWidget {
                                     : null,
                                 initialData:
                                     lastEvent?.calcLocalizedBodyFallback(
-                                  MatrixLocals(L10n.of(context)!),
+                                  MatrixLocals(L10n.of(context)),
                                   hideReply: true,
                                   hideEdit: true,
                                   plaintextBody: true,
@@ -316,10 +316,10 @@ class ChatListItem extends StatelessWidget {
                                 builder: (context, snapshot) => Text(
                                   room.membership == Membership.invite
                                       ? isDirectChat
-                                          ? L10n.of(context)!.invitePrivateChat
-                                          : L10n.of(context)!.inviteGroupChat
+                                          ? L10n.of(context).invitePrivateChat
+                                          : L10n.of(context).inviteGroupChat
                                       : snapshot.data ??
-                                          L10n.of(context)!.emptyChat,
+                                          L10n.of(context).emptyChat,
                                   softWrap: false,
                                   maxLines: 1,
                                   overflow: TextOverflow.ellipsis,

lib/pages/chat_list/chat_list_view.dart

@@ -85,7 +85,7 @@ class ChatListView extends StatelessWidget {
                               onTap: controller.clearActiveSpace,
                               icon: const Icon(Icons.forum_outlined),
                               selectedIcon: const Icon(Icons.forum),
-                              toolTip: L10n.of(context)!.chats,
+                              toolTip: L10n.of(context).chats,
                               unreadBadgeFilter: (room) => true,
                             );
                           }
@@ -95,13 +95,13 @@ class ChatListView extends StatelessWidget {
                               isSelected: false,
                               onTap: () => context.go('/rooms/newspace'),
                               icon: const Icon(Icons.add),
-                              toolTip: L10n.of(context)!.createNewSpace,
+                              toolTip: L10n.of(context).createNewSpace,
                             );
                           }
                           final space = rootSpaces[i];
                           final displayname =
                               rootSpaces[i].getLocalizedDisplayname(
-                            MatrixLocals(L10n.of(context)!),
+                            MatrixLocals(L10n.of(context)),
                           );
                           final spaceChildrenIds =
                               space.spaceChildren.map((c) => c.roomId).toSet();
@@ -144,7 +144,7 @@ class ChatListView extends StatelessWidget {
                         LogicalKeyboardKey.keyN,
                       },
                       onKeysPressed: () => context.go('/rooms/newprivatechat'),
-                      helpLabel: L10n.of(context)!.newChat,
+                      helpLabel: L10n.of(context).newChat,
                       child: selectMode == SelectMode.normal &&
                               !controller.isSearchMode &&
                               controller.activeSpaceId == null
@@ -153,7 +153,7 @@ class ChatListView extends StatelessWidget {
                                   context.go('/rooms/newprivatechat'),
                               icon: const Icon(Icons.add_outlined),
                               label: Text(
-                                L10n.of(context)!.chat,
+                                L10n.of(context).chat,
                                 overflow: TextOverflow.fade,
                               ),
                             )

lib/pages/chat_list/client_chooser_button.dart

@@ -34,7 +34,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             const Icon(Icons.group_add_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.createGroup),
+            Text(L10n.of(context).createGroup),
           ],
         ),
       ),
@@ -44,7 +44,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             const Icon(Icons.workspaces_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.createNewSpace),
+            Text(L10n.of(context).createNewSpace),
           ],
         ),
       ),
@@ -54,7 +54,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             const Icon(Icons.edit_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.setStatus),
+            Text(L10n.of(context).setStatus),
           ],
         ),
       ),
@@ -64,7 +64,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             Icon(Icons.adaptive.share_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.inviteContact),
+            Text(L10n.of(context).inviteContact),
           ],
         ),
       ),
@@ -86,7 +86,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             const Icon(Icons.settings_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.settings),
+            Text(L10n.of(context).settings),
           ],
         ),
       ),
@@ -156,7 +156,7 @@ class ClientChooserButton extends StatelessWidget {
           children: [
             const Icon(Icons.person_add_outlined),
             const SizedBox(width: 18),
-            Text(L10n.of(context)!.addAccount),
+            Text(L10n.of(context).addAccount),
           ],
         ),
       ),
@@ -178,7 +178,7 @@ class ClientChooserButton extends StatelessWidget {
             clientCount,
             (index) => KeyBoardShortcuts(
               keysToPress: _buildKeyboardShortcut(index + 1),
-              helpLabel: L10n.of(context)!.switchToAccount(index + 1),
+              helpLabel: L10n.of(context).switchToAccount(index + 1),
               onKeysPressed: () => _handleKeyboardShortcut(
                 matrix,
                 index,
@@ -192,7 +192,7 @@ class ClientChooserButton extends StatelessWidget {
               LogicalKeyboardKey.controlLeft,
               LogicalKeyboardKey.tab,
             },
-            helpLabel: L10n.of(context)!.nextAccount,
+            helpLabel: L10n.of(context).nextAccount,
             onKeysPressed: () => _nextAccount(matrix, context),
             child: const SizedBox.shrink(),
           ),
@@ -202,7 +202,7 @@ class ClientChooserButton extends StatelessWidget {
               LogicalKeyboardKey.shiftLeft,
               LogicalKeyboardKey.tab,
             },
-            helpLabel: L10n.of(context)!.previousAccount,
+            helpLabel: L10n.of(context).previousAccount,
             onKeysPressed: () => _previousAccount(matrix, context),
             child: const SizedBox.shrink(),
           ),
@@ -249,10 +249,10 @@ class ClientChooserButton extends StatelessWidget {
         case SettingsAction.addAccount:
           final consent = await showOkCancelAlertDialog(
             context: context,
-            title: L10n.of(context)!.addAccount,
-            message: L10n.of(context)!.enableMultiAccounts,
-            okLabel: L10n.of(context)!.next,
-            cancelLabel: L10n.of(context)!.cancel,
+            title: L10n.of(context).addAccount,
+            message: L10n.of(context).enableMultiAccounts,
+            okLabel: L10n.of(context).next,
+            cancelLabel: L10n.of(context).cancel,
           );
           if (consent != OkCancelResult.ok) return;
           context.go('/rooms/settings/addaccount');

lib/pages/chat_list/space_view.dart

@@ -132,10 +132,10 @@ class _SpaceViewState extends State<SpaceView> {
         final confirmed = await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.areYouSure,
-          okLabel: L10n.of(context)!.ok,
-          cancelLabel: L10n.of(context)!.cancel,
-          message: L10n.of(context)!.archiveRoomDescription,
+          title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).ok,
+          cancelLabel: L10n.of(context).cancel,
+          message: L10n.of(context).archiveRoomDescription,
         );
         if (!mounted) return;
         if (confirmed != OkCancelResult.ok) return;
@@ -153,15 +153,15 @@ class _SpaceViewState extends State<SpaceView> {
   void _addChatOrSubspace() async {
     final roomType = await showConfirmationDialog(
       context: context,
-      title: L10n.of(context)!.addChatOrSubSpace,
+      title: L10n.of(context).addChatOrSubSpace,
       actions: [
         AlertDialogAction(
           key: AddRoomType.subspace,
-          label: L10n.of(context)!.createNewSpace,
+          label: L10n.of(context).createNewSpace,
         ),
         AlertDialogAction(
           key: AddRoomType.chat,
-          label: L10n.of(context)!.createGroup,
+          label: L10n.of(context).createGroup,
         ),
       ],
     );
@@ -170,32 +170,32 @@ class _SpaceViewState extends State<SpaceView> {
     final names = await showTextInputDialog(
       context: context,
       title: roomType == AddRoomType.subspace
-          ? L10n.of(context)!.createNewSpace
-          : L10n.of(context)!.createGroup,
+          ? L10n.of(context).createNewSpace
+          : L10n.of(context).createGroup,
       textFields: [
         DialogTextField(
           hintText: roomType == AddRoomType.subspace
-              ? L10n.of(context)!.spaceName
-              : L10n.of(context)!.groupName,
+              ? L10n.of(context).spaceName
+              : L10n.of(context).groupName,
           minLines: 1,
           maxLines: 1,
           maxLength: 64,
           validator: (text) {
             if (text == null || text.isEmpty) {
-              return L10n.of(context)!.pleaseChoose;
+              return L10n.of(context).pleaseChoose;
             }
             return null;
           },
         ),
         DialogTextField(
-          hintText: L10n.of(context)!.chatDescription,
+          hintText: L10n.of(context).chatDescription,
           minLines: 4,
           maxLines: 8,
           maxLength: 255,
         ),
       ],
-      okLabel: L10n.of(context)!.create,
-      cancelLabel: L10n.of(context)!.cancel,
+      okLabel: L10n.of(context).create,
+      cancelLabel: L10n.of(context).cancel,
     );
     if (names == null) return;
     final client = Matrix.of(context).client;
@@ -245,7 +245,7 @@ class _SpaceViewState extends State<SpaceView> {
 
     final room = Matrix.of(context).client.getRoomById(widget.spaceId);
     final displayname =
-        room?.getLocalizedDisplayname() ?? L10n.of(context)!.nothingFound;
+        room?.getLocalizedDisplayname() ?? L10n.of(context).nothingFound;
     return Scaffold(
       appBar: AppBar(
         leading: Center(
@@ -269,7 +269,7 @@ class _SpaceViewState extends State<SpaceView> {
           subtitle: room == null
               ? null
               : Text(
-                  L10n.of(context)!.countChatsAndCountParticipants(
+                  L10n.of(context).countChatsAndCountParticipants(
                     room.spaceChildren.length,
                     room.summary.mJoinedMemberCount ?? 1,
                   ),
@@ -288,7 +288,7 @@ class _SpaceViewState extends State<SpaceView> {
                   children: [
                     const Icon(Icons.settings_outlined),
                     const SizedBox(width: 12),
-                    Text(L10n.of(context)!.settings),
+                    Text(L10n.of(context).settings),
                   ],
                 ),
               ),
@@ -299,7 +299,7 @@ class _SpaceViewState extends State<SpaceView> {
                   children: [
                     const Icon(Icons.person_add_outlined),
                     const SizedBox(width: 12),
-                    Text(L10n.of(context)!.invite),
+                    Text(L10n.of(context).invite),
                   ],
                 ),
               ),
@@ -310,7 +310,7 @@ class _SpaceViewState extends State<SpaceView> {
                   children: [
                     const Icon(Icons.delete_outlined),
                     const SizedBox(width: 12),
-                    Text(L10n.of(context)!.leave),
+                    Text(L10n.of(context).leave),
                   ],
                 ),
               ),
@@ -368,7 +368,7 @@ class _SpaceViewState extends State<SpaceView> {
                             borderRadius: BorderRadius.circular(99),
                           ),
                           contentPadding: EdgeInsets.zero,
-                          hintText: L10n.of(context)!.search,
+                          hintText: L10n.of(context).search,
                           hintStyle: TextStyle(
                             color: theme.colorScheme.onPrimaryContainer,
                             fontWeight: FontWeight.normal,
@@ -453,7 +453,7 @@ class _SpaceViewState extends State<SpaceView> {
                                         child: Icon(Icons.add_outlined),
                                       ),
                                       title: Text(
-                                        L10n.of(context)!.addChatOrSubSpace,
+                                        L10n.of(context).addChatOrSubSpace,
                                         style: const TextStyle(fontSize: 14),
                                       ),
                                     ),
@@ -461,7 +461,7 @@ class _SpaceViewState extends State<SpaceView> {
                                 ),
                               ],
                               SearchTitle(
-                                title: L10n.of(context)!.joinedChats,
+                                title: L10n.of(context).joinedChats,
                                 icon: const Icon(Icons.chat_outlined),
                               ),
                             ],
@@ -486,7 +486,7 @@ class _SpaceViewState extends State<SpaceView> {
                       itemBuilder: (context, i) {
                         if (i == 0) {
                           return SearchTitle(
-                            title: L10n.of(context)!.discover,
+                            title: L10n.of(context).discover,
                             icon: const Icon(Icons.explore_outlined),
                           );
                         }
@@ -497,7 +497,7 @@ class _SpaceViewState extends State<SpaceView> {
                               padding: const EdgeInsets.all(12.0),
                               child: Center(
                                 child: Text(
-                                  L10n.of(context)!.noMoreChatsFound,
+                                  L10n.of(context).noMoreChatsFound,
                                   style: const TextStyle(fontSize: 13),
                                 ),
                               ),
@@ -516,14 +516,14 @@ class _SpaceViewState extends State<SpaceView> {
                                         AppConfig.borderRadius,
                                       ),
                                     )
-                                  : Text(L10n.of(context)!.loadMore),
+                                  : Text(L10n.of(context).loadMore),
                             ),
                           );
                         }
                         final item = _discoveredChildren[i];
                         final displayname = item.name ??
                             item.canonicalAlias ??
-                            L10n.of(context)!.emptyChat;
+                            L10n.of(context).emptyChat;
                         if (!displayname.toLowerCase().contains(filter)) {
                           return const SizedBox.shrink();
                         }
@@ -564,7 +564,7 @@ class _SpaceViewState extends State<SpaceView> {
                               ),
                               subtitle: Text(
                                 item.topic ??
-                                    L10n.of(context)!.countParticipants(
+                                    L10n.of(context).countParticipants(
                                       item.numJoinedMembers,
                                     ),
                                 maxLines: 1,

lib/pages/chat_members/chat_members_view.dart

@@ -20,10 +20,10 @@ class ChatMembersView extends StatelessWidget {
     if (room == null) {
       return Scaffold(
         appBar: AppBar(
-          title: Text(L10n.of(context)!.oopsSomethingWentWrong),
+          title: Text(L10n.of(context).oopsSomethingWentWrong),
         ),
         body: Center(
-          child: Text(L10n.of(context)!.youAreNoLongerParticipatingInThisChat),
+          child: Text(L10n.of(context).youAreNoLongerParticipatingInThisChat),
         ),
       );
     }
@@ -40,7 +40,7 @@ class ChatMembersView extends StatelessWidget {
       appBar: AppBar(
         leading: const Center(child: BackButton()),
         title: Text(
-          L10n.of(context)!.countParticipants(roomCount),
+          L10n.of(context).countParticipants(roomCount),
         ),
         actions: [
           if (room.canInvite)
@@ -68,7 +68,7 @@ class ChatMembersView extends StatelessWidget {
                       OutlinedButton.icon(
                         onPressed: controller.refreshMembers,
                         icon: const Icon(Icons.refresh_outlined),
-                        label: Text(L10n.of(context)!.tryAgain),
+                        label: Text(L10n.of(context).tryAgain),
                       ),
                     ],
                   ),
@@ -102,7 +102,7 @@ class ChatMembersView extends StatelessWidget {
                                   fontWeight: FontWeight.normal,
                                 ),
                                 prefixIcon: const Icon(Icons.search_outlined),
-                                hintText: L10n.of(context)!.search,
+                                hintText: L10n.of(context).search,
                               ),
                             ),
                           )

lib/pages/chat_permissions_settings/chat_permissions_settings.dart

@@ -31,7 +31,7 @@ class ChatPermissionsSettingsController extends State<ChatPermissionsSettings> {
     final room = Matrix.of(context).client.getRoomById(roomId!)!;
     if (!room.canSendEvent(EventTypes.RoomPowerLevels)) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(L10n.of(context)!.noPermission)),
+        SnackBar(content: Text(L10n.of(context).noPermission)),
       );
       return;
     }

lib/pages/chat_permissions_settings/chat_permissions_settings_view.dart

@@ -20,7 +20,7 @@ class ChatPermissionsSettingsView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.chatPermissions),
+        title: Text(L10n.of(context).chatPermissions),
       ),
       body: MaxWidthBody(
         child: StreamBuilder(
@@ -31,7 +31,7 @@ class ChatPermissionsSettingsView extends StatelessWidget {
                 ? null
                 : Matrix.of(context).client.getRoomById(roomId);
             if (room == null) {
-              return Center(child: Text(L10n.of(context)!.noRoomsFound));
+              return Center(child: Text(L10n.of(context).noRoomsFound));
             }
             final powerLevelsContent = Map<String, Object?>.from(
               room.getState(EventTypes.RoomPowerLevels)?.content ?? {},
@@ -46,13 +46,13 @@ class ChatPermissionsSettingsView extends StatelessWidget {
                 ListTile(
                   leading: const Icon(Icons.info_outlined),
                   subtitle: Text(
-                    L10n.of(context)!.chatPermissionsDescription,
+                    L10n.of(context).chatPermissionsDescription,
                   ),
                 ),
                 Divider(color: theme.dividerColor),
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.chatPermissions,
+                    L10n.of(context).chatPermissions,
                     style: TextStyle(
                       color: theme.colorScheme.primary,
                       fontWeight: FontWeight.bold,
@@ -77,7 +77,7 @@ class ChatPermissionsSettingsView extends StatelessWidget {
                     Divider(color: theme.dividerColor),
                     ListTile(
                       title: Text(
-                        L10n.of(context)!.notifications,
+                        L10n.of(context).notifications,
                         style: TextStyle(
                           color: theme.colorScheme.primary,
                           fontWeight: FontWeight.bold,
@@ -112,7 +112,7 @@ class ChatPermissionsSettingsView extends StatelessWidget {
                     Divider(color: theme.dividerColor),
                     ListTile(
                       title: Text(
-                        L10n.of(context)!.configureChat,
+                        L10n.of(context).configureChat,
                         style: TextStyle(
                           color: theme.colorScheme.primary,
                           fontWeight: FontWeight.bold,

lib/pages/chat_permissions_settings/permission_list_tile.dart

@@ -25,45 +25,45 @@ class PermissionsListTile extends StatelessWidget {
     if (category == null) {
       switch (permissionKey) {
         case 'users_default':
-          return L10n.of(context)!.defaultPermissionLevel;
+          return L10n.of(context).defaultPermissionLevel;
         case 'events_default':
-          return L10n.of(context)!.sendMessages;
+          return L10n.of(context).sendMessages;
         case 'state_default':
-          return L10n.of(context)!.changeGeneralChatSettings;
+          return L10n.of(context).changeGeneralChatSettings;
         case 'ban':
-          return L10n.of(context)!.banFromChat;
+          return L10n.of(context).banFromChat;
         case 'kick':
-          return L10n.of(context)!.kickFromChat;
+          return L10n.of(context).kickFromChat;
         case 'redact':
-          return L10n.of(context)!.deleteMessage;
+          return L10n.of(context).deleteMessage;
         case 'invite':
-          return L10n.of(context)!.inviteOtherUsers;
+          return L10n.of(context).inviteOtherUsers;
       }
     } else if (category == 'notifications') {
       switch (permissionKey) {
         case 'rooms':
-          return L10n.of(context)!.sendRoomNotifications;
+          return L10n.of(context).sendRoomNotifications;
       }
     } else if (category == 'events') {
       switch (permissionKey) {
         case EventTypes.RoomName:
-          return L10n.of(context)!.changeTheNameOfTheGroup;
+          return L10n.of(context).changeTheNameOfTheGroup;
         case EventTypes.RoomTopic:
-          return L10n.of(context)!.changeTheDescriptionOfTheGroup;
+          return L10n.of(context).changeTheDescriptionOfTheGroup;
         case EventTypes.RoomPowerLevels:
-          return L10n.of(context)!.changeTheChatPermissions;
+          return L10n.of(context).changeTheChatPermissions;
         case EventTypes.HistoryVisibility:
-          return L10n.of(context)!.changeTheVisibilityOfChatHistory;
+          return L10n.of(context).changeTheVisibilityOfChatHistory;
         case EventTypes.RoomCanonicalAlias:
-          return L10n.of(context)!.changeTheCanonicalRoomAlias;
+          return L10n.of(context).changeTheCanonicalRoomAlias;
         case EventTypes.RoomAvatar:
-          return L10n.of(context)!.editRoomAvatar;
+          return L10n.of(context).editRoomAvatar;
         case EventTypes.RoomTombstone:
-          return L10n.of(context)!.replaceRoomWithNewerVersion;
+          return L10n.of(context).replaceRoomWithNewerVersion;
         case EventTypes.Encryption:
-          return L10n.of(context)!.enableEncryption;
+          return L10n.of(context).enableEncryption;
         case 'm.room.server_acl':
-          return L10n.of(context)!.editBlockedServers;
+          return L10n.of(context).editBlockedServers;
       }
     }
     return permissionKey;
@@ -96,13 +96,13 @@ class PermissionsListTile extends StatelessWidget {
             DropdownMenuItem(
               value: permission < 50 ? permission : 0,
               child: Text(
-                L10n.of(context)!.userLevel(permission < 50 ? permission : 0),
+                L10n.of(context).userLevel(permission < 50 ? permission : 0),
               ),
             ),
             DropdownMenuItem(
               value: permission < 100 && permission >= 50 ? permission : 50,
               child: Text(
-                L10n.of(context)!.moderatorLevel(
+                L10n.of(context).moderatorLevel(
                   permission < 100 && permission >= 50 ? permission : 50,
                 ),
               ),
@@ -110,13 +110,13 @@ class PermissionsListTile extends StatelessWidget {
             DropdownMenuItem(
               value: permission >= 100 ? permission : 100,
               child: Text(
-                L10n.of(context)!
+                L10n.of(context)
                     .adminLevel(permission >= 100 ? permission : 100),
               ),
             ),
             DropdownMenuItem(
               value: null,
-              child: Text(L10n.of(context)!.custom),
+              child: Text(L10n.of(context).custom),
             ),
           ],
         ),

lib/pages/chat_search/chat_search_files_tab.dart

@@ -37,9 +37,9 @@ class ChatSearchFilesTab extends StatelessWidget {
               const CircularProgressIndicator.adaptive(strokeWidth: 2),
               const SizedBox(height: 8),
               Text(
-                L10n.of(context)!.searchIn(
+                L10n.of(context).searchIn(
                   room.getLocalizedDisplayname(
-                    MatrixLocals(L10n.of(context)!),
+                    MatrixLocals(L10n.of(context)),
                   ),
                 ),
               ),
@@ -53,7 +53,7 @@ class ChatSearchFilesTab extends StatelessWidget {
             children: [
               const Icon(Icons.file_present_outlined, size: 64),
               const SizedBox(height: 8),
-              Text(L10n.of(context)!.nothingFound),
+              Text(L10n.of(context).nothingFound),
             ],
           );
         }
@@ -93,7 +93,7 @@ class ChatSearchFilesTab extends StatelessWidget {
                       icon: const Icon(
                         Icons.arrow_downward_outlined,
                       ),
-                      label: Text(L10n.of(context)!.searchMore),
+                      label: Text(L10n.of(context).searchMore),
                     ),
                   ),
                 );
@@ -101,7 +101,7 @@ class ChatSearchFilesTab extends StatelessWidget {
               final event = events[i];
               final filename = event.content.tryGet<String>('filename') ??
                   event.content.tryGet<String>('body') ??
-                  L10n.of(context)!.unknownEvent('File');
+                  L10n.of(context).unknownEvent('File');
               final filetype = (filename.contains('.')
                   ? filename.split('.').last.toUpperCase()
                   : event.content

lib/pages/chat_search/chat_search_images_tab.dart

@@ -37,9 +37,9 @@ class ChatSearchImagesTab extends StatelessWidget {
               const CircularProgressIndicator.adaptive(strokeWidth: 2),
               const SizedBox(height: 8),
               Text(
-                L10n.of(context)!.searchIn(
+                L10n.of(context).searchIn(
                   room.getLocalizedDisplayname(
-                    MatrixLocals(L10n.of(context)!),
+                    MatrixLocals(L10n.of(context)),
                   ),
                 ),
               ),
@@ -52,7 +52,7 @@ class ChatSearchImagesTab extends StatelessWidget {
             children: [
               const Icon(Icons.photo_outlined, size: 64),
               const SizedBox(height: 8),
-              Text(L10n.of(context)!.nothingFound),
+              Text(L10n.of(context).nothingFound),
             ],
           );
         }
@@ -102,7 +102,7 @@ class ChatSearchImagesTab extends StatelessWidget {
                     icon: const Icon(
                       Icons.arrow_downward_outlined,
                     ),
-                    label: Text(L10n.of(context)!.searchMore),
+                    label: Text(L10n.of(context).searchMore),
                   ),
                 ),
               );

lib/pages/chat_search/chat_search_message_tab.dart

@@ -41,9 +41,9 @@ class ChatSearchMessageTab extends StatelessWidget {
               const Icon(Icons.search_outlined, size: 64),
               const SizedBox(height: 8),
               Text(
-                L10n.of(context)!.searchIn(
+                L10n.of(context).searchIn(
                   room.getLocalizedDisplayname(
-                    MatrixLocals(L10n.of(context)!),
+                    MatrixLocals(L10n.of(context)),
                   ),
                 ),
               ),
@@ -90,7 +90,7 @@ class ChatSearchMessageTab extends StatelessWidget {
                       icon: const Icon(
                         Icons.arrow_downward_outlined,
                       ),
-                      label: Text(L10n.of(context)!.searchMore),
+                      label: Text(L10n.of(context).searchMore),
                     ),
                   ),
                 );
@@ -98,7 +98,7 @@ class ChatSearchMessageTab extends StatelessWidget {
               final event = events[i];
               final sender = event.senderFromMemoryOrFallback;
               final displayname = sender.calcDisplayname(
-                i18n: MatrixLocals(L10n.of(context)!),
+                i18n: MatrixLocals(L10n.of(context)),
               );
               return _MessageSearchResultListTile(
                 sender: sender,
@@ -164,7 +164,7 @@ class _MessageSearchResultListTile extends StatelessWidget {
               plaintextBody: true,
               removeMarkdown: true,
               MatrixLocals(
-                L10n.of(context)!,
+                L10n.of(context),
               ),
             )
             .trim(),

lib/pages/chat_search/chat_search_view.dart

@@ -20,12 +20,11 @@ class ChatSearchView extends StatelessWidget {
     final room = controller.room;
     if (room == null) {
       return Scaffold(
-        appBar: AppBar(title: Text(L10n.of(context)!.oopsSomethingWentWrong)),
+        appBar: AppBar(title: Text(L10n.of(context).oopsSomethingWentWrong)),
         body: Center(
           child: Padding(
             padding: const EdgeInsets.all(16),
-            child:
-                Text(L10n.of(context)!.youAreNoLongerParticipatingInThisChat),
+            child: Text(L10n.of(context).youAreNoLongerParticipatingInThisChat),
           ),
         ),
       );
@@ -38,8 +37,8 @@ class ChatSearchView extends StatelessWidget {
         leading: const Center(child: BackButton()),
         titleSpacing: 0,
         title: Text(
-          L10n.of(context)!.searchIn(
-            room.getLocalizedDisplayname(MatrixLocals(L10n.of(context)!)),
+          L10n.of(context).searchIn(
+            room.getLocalizedDisplayname(MatrixLocals(L10n.of(context))),
           ),
         ),
       ),
@@ -59,7 +58,7 @@ class ChatSearchView extends StatelessWidget {
                 autofocus: true,
                 enabled: controller.tabController.index == 0,
                 decoration: InputDecoration(
-                  hintText: L10n.of(context)!.search,
+                  hintText: L10n.of(context).search,
                   suffixIcon: const Icon(Icons.search_outlined),
                   filled: true,
                   fillColor: theme.colorScheme.secondaryContainer,
@@ -77,9 +76,9 @@ class ChatSearchView extends StatelessWidget {
             TabBar(
               controller: controller.tabController,
               tabs: [
-                Tab(child: Text(L10n.of(context)!.messages)),
-                Tab(child: Text(L10n.of(context)!.gallery)),
-                Tab(child: Text(L10n.of(context)!.files)),
+                Tab(child: Text(L10n.of(context).messages)),
+                Tab(child: Text(L10n.of(context).gallery)),
+                Tab(child: Text(L10n.of(context).files)),
               ],
             ),
             Expanded(

lib/pages/device_settings/device_settings.dart

@@ -35,10 +35,10 @@ class DevicesSettingsController extends State<DevicesSettings> {
   void removeDevicesAction(List<Device> devices) async {
     if (await showOkCancelAlertDialog(
           context: context,
-          title: L10n.of(context)!.areYouSure,
-          okLabel: L10n.of(context)!.yes,
-          cancelLabel: L10n.of(context)!.cancel,
-          message: L10n.of(context)!.removeDevicesDescription,
+          title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).yes,
+          cancelLabel: L10n.of(context).cancel,
+          message: L10n.of(context).removeDevicesDescription,
         ) ==
         OkCancelResult.cancel) return;
     final matrix = Matrix.of(context);
@@ -70,9 +70,9 @@ class DevicesSettingsController extends State<DevicesSettings> {
   void renameDeviceAction(Device device) async {
     final displayName = await showTextInputDialog(
       context: context,
-      title: L10n.of(context)!.changeDeviceName,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).changeDeviceName,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
           hintText: device.displayName,
@@ -94,10 +94,10 @@ class DevicesSettingsController extends State<DevicesSettings> {
   void verifyDeviceAction(Device device) async {
     final consent = await showOkCancelAlertDialog(
       context: context,
-      title: L10n.of(context)!.verifyOtherDevice,
-      message: L10n.of(context)!.verifyOtherDeviceDescription,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).verifyOtherDevice,
+      message: L10n.of(context).verifyOtherDeviceDescription,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       fullyCapitalizedForMaterial: false,
     );
     if (consent != OkCancelResult.ok) return;

lib/pages/device_settings/device_settings_view.dart

@@ -16,7 +16,7 @@ class DevicesSettingsView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.devices),
+        title: Text(L10n.of(context).devices),
       ),
       body: MaxWidthBody(
         child: FutureBuilder<bool>(
@@ -56,7 +56,7 @@ class DevicesSettingsView extends StatelessWidget {
                           ),
                           alignment: Alignment.centerLeft,
                           child: Text(
-                            L10n.of(context)!.thisDevice,
+                            L10n.of(context).thisDevice,
                             style: TextStyle(
                               fontWeight: FontWeight.bold,
                               color: theme.colorScheme.primary,
@@ -84,7 +84,7 @@ class DevicesSettingsView extends StatelessWidget {
                             child: TextButton.icon(
                               label: Text(
                                 controller.errorDeletingDevices ??
-                                    L10n.of(context)!.removeAllOtherDevices,
+                                    L10n.of(context).removeAllOtherDevices,
                               ),
                               style: TextButton.styleFrom(
                                 foregroundColor:
@@ -109,7 +109,7 @@ class DevicesSettingsView extends StatelessWidget {
                         Center(
                           child: Padding(
                             padding: const EdgeInsets.all(16.0),
-                            child: Text(L10n.of(context)!.noOtherDevicesFound),
+                            child: Text(L10n.of(context).noOtherDevicesFound),
                           ),
                         ),
                     ],

lib/pages/device_settings/user_device_list_item.dart

@@ -55,30 +55,30 @@ class UserDeviceListItem extends StatelessWidget {
               actions: [
                 SheetAction(
                   key: UserDeviceListItemAction.rename,
-                  label: L10n.of(context)!.changeDeviceName,
+                  label: L10n.of(context).changeDeviceName,
                 ),
                 if (!isOwnDevice && keys != null) ...{
                   SheetAction(
                     key: UserDeviceListItemAction.verify,
-                    label: L10n.of(context)!.verifyStart,
+                    label: L10n.of(context).verifyStart,
                   ),
                   if (!keys.blocked)
                     SheetAction(
                       key: UserDeviceListItemAction.block,
-                      label: L10n.of(context)!.blockDevice,
+                      label: L10n.of(context).blockDevice,
                       isDestructiveAction: true,
                     ),
                   if (keys.blocked)
                     SheetAction(
                       key: UserDeviceListItemAction.unblock,
-                      label: L10n.of(context)!.unblockDevice,
+                      label: L10n.of(context).unblockDevice,
                       isDestructiveAction: true,
                     ),
                 },
                 if (!isOwnDevice)
                   SheetAction(
                     key: UserDeviceListItemAction.remove,
-                    label: L10n.of(context)!.delete,
+                    label: L10n.of(context).delete,
                     isDestructiveAction: true,
                   ),
               ],
@@ -119,7 +119,7 @@ class UserDeviceListItem extends StatelessWidget {
             overflow: TextOverflow.ellipsis,
           ),
           subtitle: Text(
-            L10n.of(context)!.lastActiveAgo(
+            L10n.of(context).lastActiveAgo(
               DateTime.fromMillisecondsSinceEpoch(userDevice.lastSeenTs ?? 0)
                   .localizedTimeShort(context),
             ),
@@ -129,10 +129,10 @@ class UserDeviceListItem extends StatelessWidget {
               ? null
               : Text(
                   keys.blocked
-                      ? L10n.of(context)!.blocked
+                      ? L10n.of(context).blocked
                       : keys.verified
-                          ? L10n.of(context)!.verified
-                          : L10n.of(context)!.unverified,
+                          ? L10n.of(context).verified
+                          : L10n.of(context).unverified,
                   style: TextStyle(
                     color: keys.blocked
                         ? Colors.red

lib/pages/dialer/dialer.dart

@@ -134,7 +134,7 @@ class MyCallingPage extends State<Calling> {
   Room? get room => call.room;
 
   String get displayName => call.room.getLocalizedDisplayname(
-        MatrixLocals(L10n.of(widget.context)!),
+        MatrixLocals(L10n.of(widget.context)),
       );
 
   String get callId => widget.callId;
@@ -296,14 +296,14 @@ class MyCallingPage extends State<Calling> {
             channelId: 'notification_channel_id',
             channelName: 'Foreground Notification',
             channelDescription:
-                L10n.of(widget.context)!.foregroundServiceRunning,
+                L10n.of(widget.context).foregroundServiceRunning,
           ),
           iosNotificationOptions: const IOSNotificationOptions(),
           foregroundTaskOptions: const ForegroundTaskOptions(),
         );
         FlutterForegroundTask.startService(
-          notificationTitle: L10n.of(widget.context)!.screenSharingTitle,
-          notificationText: L10n.of(widget.context)!.screenSharingDetail,
+          notificationTitle: L10n.of(widget.context).screenSharingTitle,
+          notificationText: L10n.of(widget.context).screenSharingDetail,
         );
       } else {
         FlutterForegroundTask.stopService();
@@ -457,7 +457,7 @@ class MyCallingPage extends State<Calling> {
       var title = '';
       if (call.localHold) {
         title = '${call.room.getLocalizedDisplayname(
-          MatrixLocals(L10n.of(widget.context)!),
+          MatrixLocals(L10n.of(widget.context)),
         )} held the call.';
       } else if (call.remoteOnHold) {
         title = 'You held the call.';

lib/pages/homeserver_picker/homeserver_picker.dart

@@ -49,8 +49,8 @@ class HomeserverPickerController extends State<HomeserverPicker> {
       (e, s) async {
         await showOkAlertDialog(
           context: context,
-          title: L10n.of(context)!.indexedDbErrorTitle,
-          message: L10n.of(context)!.indexedDbErrorLong,
+          title: L10n.of(context).indexedDbErrorTitle,
+          message: L10n.of(context).indexedDbErrorLong,
         );
         _checkTorBrowser();
       },

lib/pages/homeserver_picker/homeserver_picker_view.dart

@@ -24,7 +24,7 @@ class HomeserverPickerView extends StatelessWidget {
       appBar: controller.widget.addMultiAccount
           ? AppBar(
               centerTitle: true,
-              title: Text(L10n.of(context)!.addAccount),
+              title: Text(L10n.of(context).addAccount),
             )
           : null,
       body: Column(
@@ -46,8 +46,8 @@ class HomeserverPickerView extends StatelessWidget {
               color: theme.colorScheme.surface,
               child: ListTile(
                 leading: const Icon(Icons.vpn_key),
-                title: Text(L10n.of(context)!.hydrateTor),
-                subtitle: Text(L10n.of(context)!.hydrateTorLong),
+                title: Text(L10n.of(context).hydrateTor),
+                subtitle: Text(L10n.of(context).hydrateTorLong),
                 trailing: const Icon(Icons.chevron_right_outlined),
                 onTap: controller.restoreBackup,
               ),
@@ -95,16 +95,16 @@ class HomeserverPickerView extends StatelessWidget {
                   borderRadius: BorderRadius.circular(AppConfig.borderRadius),
                 ),
                 hintText: AppConfig.defaultHomeserver,
-                labelText: L10n.of(context)!.homeserver,
+                labelText: L10n.of(context).homeserver,
                 errorText: controller.error,
                 suffixIcon: IconButton(
                   onPressed: () {
                     showDialog(
                       context: context,
                       builder: (context) => AlertDialog.adaptive(
-                        title: Text(L10n.of(context)!.whatIsAHomeserver),
+                        title: Text(L10n.of(context).whatIsAHomeserver),
                         content: Linkify(
-                          text: L10n.of(context)!.homeserverDescription,
+                          text: L10n.of(context).homeserverDescription,
                         ),
                         actions: [
                           TextButton(
@@ -112,12 +112,12 @@ class HomeserverPickerView extends StatelessWidget {
                               Uri.https('servers.joinmatrix.org'),
                             ),
                             child: Text(
-                              L10n.of(context)!.discoverHomeservers,
+                              L10n.of(context).discoverHomeservers,
                             ),
                           ),
                           TextButton(
                             onPressed: Navigator.of(context).pop,
-                            child: Text(L10n.of(context)!.close),
+                            child: Text(L10n.of(context).close),
                           ),
                         ],
                       ),
@@ -144,7 +144,7 @@ class HomeserverPickerView extends StatelessWidget {
                 onPressed: controller.isLoggingIn || controller.isLoading
                     ? null
                     : controller.restoreBackup,
-                child: Text(L10n.of(context)!.hydrate),
+                child: Text(L10n.of(context).hydrate),
               ),
               if (controller.supportsPasswordLogin && controller.supportsSso)
                 TextButton(
@@ -155,7 +155,7 @@ class HomeserverPickerView extends StatelessWidget {
                   onPressed: controller.isLoggingIn || controller.isLoading
                       ? null
                       : controller.login,
-                  child: Text(L10n.of(context)!.loginWithMatrixId),
+                  child: Text(L10n.of(context).loginWithMatrixId),
                 ),
               const SizedBox(height: 8.0),
               if (controller.supportsPasswordLogin || controller.supportsSso)
@@ -169,7 +169,7 @@ class HomeserverPickerView extends StatelessWidget {
                       : controller.supportsSso
                           ? controller.ssoLoginAction
                           : controller.login,
-                  child: Text(L10n.of(context)!.next),
+                  child: Text(L10n.of(context).next),
                 ),
             ],
           ),

lib/pages/image_viewer/image_viewer_view.dart

@@ -25,7 +25,7 @@ class ImageViewerView extends StatelessWidget {
           icon: const Icon(Icons.close),
           onPressed: Navigator.of(context).pop,
           color: Colors.white,
-          tooltip: L10n.of(context)!.close,
+          tooltip: L10n.of(context).close,
         ),
         backgroundColor: Colors.transparent,
         actions: [
@@ -36,7 +36,7 @@ class ImageViewerView extends StatelessWidget {
             icon: const Icon(Icons.reply_outlined),
             onPressed: controller.forwardAction,
             color: Colors.white,
-            tooltip: L10n.of(context)!.share,
+            tooltip: L10n.of(context).share,
           ),
           const SizedBox(width: 8),
           IconButton(
@@ -46,7 +46,7 @@ class ImageViewerView extends StatelessWidget {
             icon: const Icon(Icons.download_outlined),
             onPressed: () => controller.saveFileAction(context),
             color: Colors.white,
-            tooltip: L10n.of(context)!.downloadFile,
+            tooltip: L10n.of(context).downloadFile,
           ),
           const SizedBox(width: 8),
           if (PlatformInfos.isMobile)
@@ -59,7 +59,7 @@ class ImageViewerView extends StatelessWidget {
                     backgroundColor: Colors.black.withOpacity(0.5),
                   ),
                   onPressed: () => controller.shareFileAction(context),
-                  tooltip: L10n.of(context)!.share,
+                  tooltip: L10n.of(context).share,
                   color: Colors.white,
                   icon: Icon(Icons.adaptive.share_outlined),
                 ),

lib/pages/invitation_selection/invitation_selection.dart

@@ -57,15 +57,15 @@ class InvitationSelectionController extends State<InvitationSelection> {
     if (OkCancelResult.ok !=
         await showOkCancelAlertDialog(
           context: context,
-          title: L10n.of(context)!.inviteContact,
-          message: L10n.of(context)!.inviteContactToGroupQuestion(
+          title: L10n.of(context).inviteContact,
+          message: L10n.of(context).inviteContactToGroupQuestion(
             displayname,
             room.getLocalizedDisplayname(
-              MatrixLocals(L10n.of(context)!),
+              MatrixLocals(L10n.of(context)),
             ),
           ),
-          okLabel: L10n.of(context)!.invite,
-          cancelLabel: L10n.of(context)!.cancel,
+          okLabel: L10n.of(context).invite,
+          cancelLabel: L10n.of(context).cancel,
         )) {
       return;
     }
@@ -76,7 +76,7 @@ class InvitationSelectionController extends State<InvitationSelection> {
     if (success.error == null) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
-          content: Text(L10n.of(context)!.contactHasBeenInvitedToTheGroup),
+          content: Text(L10n.of(context).contactHasBeenInvitedToTheGroup),
         ),
       );
     }

lib/pages/invitation_selection/invitation_selection_view.dart

@@ -20,21 +20,21 @@ class InvitationSelectionView extends StatelessWidget {
     if (room == null) {
       return Scaffold(
         appBar: AppBar(
-          title: Text(L10n.of(context)!.oopsSomethingWentWrong),
+          title: Text(L10n.of(context).oopsSomethingWentWrong),
         ),
         body: Center(
-          child: Text(L10n.of(context)!.youAreNoLongerParticipatingInThisChat),
+          child: Text(L10n.of(context).youAreNoLongerParticipatingInThisChat),
         ),
       );
     }
 
-    final groupName = room.name.isEmpty ? L10n.of(context)!.group : room.name;
+    final groupName = room.name.isEmpty ? L10n.of(context).group : room.name;
     final theme = Theme.of(context);
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
         titleSpacing: 0,
-        title: Text(L10n.of(context)!.inviteContact),
+        title: Text(L10n.of(context).inviteContact),
       ),
       body: MaxWidthBody(
         innerPadding: const EdgeInsets.symmetric(vertical: 8),
@@ -55,7 +55,7 @@ class InvitationSelectionView extends StatelessWidget {
                     color: theme.colorScheme.onPrimaryContainer,
                     fontWeight: FontWeight.normal,
                   ),
-                  hintText: L10n.of(context)!.inviteContactToGroup(groupName),
+                  hintText: L10n.of(context).inviteContactToGroup(groupName),
                   prefixIcon: controller.loading
                       ? const Padding(
                           padding: EdgeInsets.symmetric(
@@ -91,7 +91,7 @@ class InvitationSelectionView extends StatelessWidget {
                           displayname: controller
                                   .foundProfiles[i].displayName ??
                               controller.foundProfiles[i].userId.localpart ??
-                              L10n.of(context)!.user,
+                              L10n.of(context).user,
                           userId: controller.foundProfiles[i].userId,
                           isMember: participants
                               .contains(controller.foundProfiles[i].userId),
@@ -100,7 +100,7 @@ class InvitationSelectionView extends StatelessWidget {
                             controller.foundProfiles[i].userId,
                             controller.foundProfiles[i].displayName ??
                                 controller.foundProfiles[i].userId.localpart ??
-                                L10n.of(context)!.user,
+                                L10n.of(context).user,
                           ),
                         ),
                       )
@@ -124,7 +124,7 @@ class InvitationSelectionView extends StatelessWidget {
                               avatarUrl: contacts[i].avatarUrl,
                               displayname: contacts[i].displayName ??
                                   contacts[i].id.localpart ??
-                                  L10n.of(context)!.user,
+                                  L10n.of(context).user,
                               userId: contacts[i].id,
                               isMember: participants.contains(contacts[i].id),
                               onTap: () => controller.inviteAction(
@@ -132,7 +132,7 @@ class InvitationSelectionView extends StatelessWidget {
                                 contacts[i].id,
                                 contacts[i].displayName ??
                                     contacts[i].id.localpart ??
-                                    L10n.of(context)!.user,
+                                    L10n.of(context).user,
                               ),
                             ),
                           );
@@ -189,7 +189,7 @@ class _InviteContactListTile extends StatelessWidget {
         ),
         onTap: isMember ? null : onTap,
         trailing: isMember
-            ? Text(L10n.of(context)!.participant)
+            ? Text(L10n.of(context).participant)
             : const Icon(Icons.person_add_outlined),
       ),
     );

lib/pages/key_verification/key_verification_dialog.dart

@@ -87,7 +87,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
       await showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.incorrectPassphraseOrKey,
+        message: L10n.of(context).incorrectPassphraseOrKey,
       );
     }
   }
@@ -106,7 +106,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
     }
     final displayName =
         user?.calcDisplayname() ?? widget.request.userId.localpart!;
-    var title = Text(L10n.of(context)!.verifyTitle);
+    var title = Text(L10n.of(context).verifyTitle);
     Widget body;
     final buttons = <Widget>[];
 
@@ -124,7 +124,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
             mainAxisSize: MainAxisSize.min,
             children: <Widget>[
               Text(
-                L10n.of(context)!.askSSSSSign,
+                L10n.of(context).askSSSSSign,
                 style: const TextStyle(fontSize: 20),
               ),
               Container(height: 10),
@@ -140,7 +140,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
                 maxLines: 1,
                 obscureText: true,
                 decoration: InputDecoration(
-                  hintText: L10n.of(context)!.passphraseOrKey,
+                  hintText: L10n.of(context).passphraseOrKey,
                   prefixStyle: TextStyle(color: theme.colorScheme.primary),
                   suffixStyle: TextStyle(color: theme.colorScheme.primary),
                   border: const OutlineInputBorder(),
@@ -152,7 +152,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton(
             child: Text(
-              L10n.of(context)!.submit,
+              L10n.of(context).submit,
             ),
             onPressed: () => checkInput(textEditingController.text),
           ),
@@ -160,14 +160,14 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton(
             child: Text(
-              L10n.of(context)!.skip,
+              L10n.of(context).skip,
             ),
             onPressed: () => widget.request.openSSSS(skip: true),
           ),
         );
         break;
       case KeyVerificationState.askAccept:
-        title = Text(L10n.of(context)!.newVerificationRequest);
+        title = Text(L10n.of(context).newVerificationRequest);
         body = Column(
           mainAxisSize: MainAxisSize.min,
           children: [
@@ -179,7 +179,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
             ),
             const SizedBox(height: 16),
             Text(
-              L10n.of(context)!.askVerificationRequest(displayName),
+              L10n.of(context).askVerificationRequest(displayName),
             ),
           ],
         );
@@ -187,7 +187,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
           TextButton.icon(
             icon: const Icon(Icons.close),
             style: TextButton.styleFrom(foregroundColor: Colors.red),
-            label: Text(L10n.of(context)!.reject),
+            label: Text(L10n.of(context).reject),
             onPressed: () => widget.request
                 .rejectVerification()
                 .then((_) => Navigator.of(context, rootNavigator: false).pop()),
@@ -196,7 +196,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton.icon(
             icon: const Icon(Icons.check),
-            label: Text(L10n.of(context)!.accept),
+            label: Text(L10n.of(context).accept),
             onPressed: () => widget.request.acceptVerification(),
           ),
         );
@@ -222,7 +222,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
               ),
               const SizedBox(height: 16),
               Text(
-                L10n.of(context)!.waitingPartnerAcceptRequest,
+                L10n.of(context).waitingPartnerAcceptRequest,
                 textAlign: TextAlign.center,
               ),
             ],
@@ -231,7 +231,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton.icon(
             icon: const Icon(Icons.close),
-            label: Text(L10n.of(context)!.cancel),
+            label: Text(L10n.of(context).cancel),
             onPressed: () => widget.request.cancel(),
           ),
         );
@@ -244,7 +244,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
 
         if (widget.request.sasTypes.contains('emoji')) {
           title = Text(
-            L10n.of(context)!.compareEmojiMatch,
+            L10n.of(context).compareEmojiMatch,
             maxLines: 1,
             style: const TextStyle(fontSize: 16),
           );
@@ -254,7 +254,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
                 .toList(),
           );
         } else {
-          title = Text(L10n.of(context)!.compareNumbersMatch);
+          title = Text(L10n.of(context).compareNumbersMatch);
           final numbers = widget.request.sasNumbers;
           final numbstr = '${numbers[0]}-${numbers[1]}-${numbers[2]}';
           compareWidget =
@@ -275,22 +275,22 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
             style: TextButton.styleFrom(
               foregroundColor: Colors.red,
             ),
-            label: Text(L10n.of(context)!.theyDontMatch),
+            label: Text(L10n.of(context).theyDontMatch),
             onPressed: () => widget.request.rejectSas(),
           ),
         );
         buttons.add(
           TextButton.icon(
             icon: const Icon(Icons.check_outlined),
-            label: Text(L10n.of(context)!.theyMatch),
+            label: Text(L10n.of(context).theyMatch),
             onPressed: () => widget.request.acceptSas(),
           ),
         );
         break;
       case KeyVerificationState.waitingSas:
         final acceptText = widget.request.sasTypes.contains('emoji')
-            ? L10n.of(context)!.waitingPartnerEmoji
-            : L10n.of(context)!.waitingPartnerNumbers;
+            ? L10n.of(context).waitingPartnerEmoji
+            : L10n.of(context).waitingPartnerNumbers;
         body = Column(
           mainAxisSize: MainAxisSize.min,
           children: <Widget>[
@@ -314,7 +314,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
             ),
             const SizedBox(height: 10),
             Text(
-              L10n.of(context)!.verifySuccess,
+              L10n.of(context).verifySuccess,
               textAlign: TextAlign.center,
             ),
           ],
@@ -322,7 +322,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton(
             child: Text(
-              L10n.of(context)!.close,
+              L10n.of(context).close,
             ),
             onPressed: () => Navigator.of(context, rootNavigator: false).pop(),
           ),
@@ -345,7 +345,7 @@ class KeyVerificationPageState extends State<KeyVerificationDialog> {
         buttons.add(
           TextButton(
             child: Text(
-              L10n.of(context)!.close,
+              L10n.of(context).close,
             ),
             onPressed: () => Navigator.of(context, rootNavigator: false).pop(),
           ),

lib/pages/login/login.dart

@@ -33,12 +33,12 @@ class LoginController extends State<Login> {
   void login() async {
     final matrix = Matrix.of(context);
     if (usernameController.text.isEmpty) {
-      setState(() => usernameError = L10n.of(context)!.pleaseEnterYourUsername);
+      setState(() => usernameError = L10n.of(context).pleaseEnterYourUsername);
     } else {
       setState(() => usernameError = null);
     }
     if (passwordController.text.isEmpty) {
-      setState(() => passwordError = L10n.of(context)!.pleaseEnterYourPassword);
+      setState(() => passwordError = L10n.of(context).pleaseEnterYourPassword);
     } else {
       setState(() => passwordError = null);
     }
@@ -128,10 +128,9 @@ class LoginController extends State<Login> {
           final dialogResult = await showOkCancelAlertDialog(
             context: context,
             useRootNavigator: false,
-            message:
-                L10n.of(context)!.noMatrixServer(newDomain, oldHomeserver!),
-            okLabel: L10n.of(context)!.ok,
-            cancelLabel: L10n.of(context)!.cancel,
+            message: L10n.of(context).noMatrixServer(newDomain, oldHomeserver!),
+            okLabel: L10n.of(context).ok,
+            cancelLabel: L10n.of(context).cancel,
           );
           if (dialogResult == OkCancelResult.ok) {
             if (mounted) setState(() => usernameError = null);
@@ -159,16 +158,16 @@ class LoginController extends State<Login> {
     final input = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.passwordForgotten,
-      message: L10n.of(context)!.enterAnEmailAddress,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).passwordForgotten,
+      message: L10n.of(context).enterAnEmailAddress,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       fullyCapitalizedForMaterial: false,
       textFields: [
         DialogTextField(
           initialText:
               usernameController.text.isEmail ? usernameController.text : '',
-          hintText: L10n.of(context)!.enterAnEmailAddress,
+          hintText: L10n.of(context).enterAnEmailAddress,
           keyboardType: TextInputType.emailAddress,
         ),
       ],
@@ -188,10 +187,10 @@ class LoginController extends State<Login> {
     final password = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.passwordForgotten,
-      message: L10n.of(context)!.chooseAStrongPassword,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).passwordForgotten,
+      message: L10n.of(context).chooseAStrongPassword,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       fullyCapitalizedForMaterial: false,
       textFields: [
         const DialogTextField(
@@ -206,9 +205,9 @@ class LoginController extends State<Login> {
     final ok = await showOkAlertDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.weSentYouAnEmail,
-      message: L10n.of(context)!.pleaseClickOnLink,
-      okLabel: L10n.of(context)!.iHaveClickedOnLink,
+      title: L10n.of(context).weSentYouAnEmail,
+      message: L10n.of(context).pleaseClickOnLink,
+      okLabel: L10n.of(context).iHaveClickedOnLink,
       fullyCapitalizedForMaterial: false,
     );
     if (ok != OkCancelResult.ok) return;
@@ -233,7 +232,7 @@ class LoginController extends State<Login> {
     );
     if (success.error == null) {
       ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(L10n.of(context)!.passwordHasBeenChanged)),
+        SnackBar(content: Text(L10n.of(context).passwordHasBeenChanged)),
       );
       usernameController.text = input.single;
       passwordController.text = password.single;

lib/pages/login/login_view.dart

@@ -20,7 +20,7 @@ class LoginView extends StatelessWidget {
         .homeserver
         .toString()
         .replaceFirst('https://', '');
-    final title = L10n.of(context)!.logInTo(homeserver);
+    final title = L10n.of(context).logInTo(homeserver);
     final titleParts = title.split(homeserver);
 
     return LoginScaffold(
@@ -68,7 +68,7 @@ class LoginView extends StatelessWidget {
                       errorText: controller.usernameError,
                       errorStyle: const TextStyle(color: Colors.orange),
                       hintText: '@username:localpart',
-                      labelText: L10n.of(context)!.emailOrUsername,
+                      labelText: L10n.of(context).emailOrUsername,
                     ),
                   ),
                 ),
@@ -98,7 +98,7 @@ class LoginView extends StatelessWidget {
                         ),
                       ),
                       hintText: '******',
-                      labelText: L10n.of(context)!.password,
+                      labelText: L10n.of(context).password,
                     ),
                   ),
                 ),
@@ -113,7 +113,7 @@ class LoginView extends StatelessWidget {
                     onPressed: controller.loading ? null : controller.login,
                     child: controller.loading
                         ? const LinearProgressIndicator()
-                        : Text(L10n.of(context)!.login),
+                        : Text(L10n.of(context).login),
                   ),
                 ),
                 const SizedBox(height: 16),
@@ -126,7 +126,7 @@ class LoginView extends StatelessWidget {
                     style: TextButton.styleFrom(
                       foregroundColor: theme.colorScheme.error,
                     ),
-                    child: Text(L10n.of(context)!.passwordForgotten),
+                    child: Text(L10n.of(context).passwordForgotten),
                   ),
                 ),
                 const SizedBox(height: 16),

lib/pages/new_group/new_group_view.dart

@@ -26,7 +26,7 @@ class NewGroupView extends StatelessWidget {
             onPressed: controller.loading ? null : Navigator.of(context).pop,
           ),
         ),
-        title: Text(L10n.of(context)!.createGroup),
+        title: Text(L10n.of(context).createGroup),
       ),
       body: MaxWidthBody(
         child: Column(
@@ -61,7 +61,7 @@ class NewGroupView extends StatelessWidget {
                 readOnly: controller.loading,
                 decoration: InputDecoration(
                   prefixIcon: const Icon(Icons.people_outlined),
-                  labelText: L10n.of(context)!.groupName,
+                  labelText: L10n.of(context).groupName,
                 ),
               ),
             ),
@@ -69,7 +69,7 @@ class NewGroupView extends StatelessWidget {
             SwitchListTile.adaptive(
               contentPadding: const EdgeInsets.symmetric(horizontal: 32),
               secondary: const Icon(Icons.public_outlined),
-              title: Text(L10n.of(context)!.groupIsPublic),
+              title: Text(L10n.of(context).groupIsPublic),
               value: controller.publicGroup,
               onChanged: controller.loading ? null : controller.setPublicGroup,
             ),
@@ -80,7 +80,7 @@ class NewGroupView extends StatelessWidget {
                       contentPadding:
                           const EdgeInsets.symmetric(horizontal: 32),
                       secondary: const Icon(Icons.search_outlined),
-                      title: Text(L10n.of(context)!.groupCanBeFoundViaSearch),
+                      title: Text(L10n.of(context).groupCanBeFoundViaSearch),
                       value: controller.groupCanBeFound,
                       onChanged: controller.loading
                           ? null
@@ -95,7 +95,7 @@ class NewGroupView extends StatelessWidget {
                 color: theme.colorScheme.onSurface,
               ),
               title: Text(
-                L10n.of(context)!.enableEncryption,
+                L10n.of(context).enableEncryption,
                 style: TextStyle(
                   color: theme.colorScheme.onSurface,
                 ),
@@ -112,7 +112,7 @@ class NewGroupView extends StatelessWidget {
                       controller.loading ? null : controller.submitAction,
                   child: controller.loading
                       ? const LinearProgressIndicator()
-                      : Text(L10n.of(context)!.createGroupAndInviteUsers),
+                      : Text(L10n.of(context).createGroupAndInviteUsers),
                 ),
               ),
             ),

lib/pages/new_private_chat/new_private_chat.dart

@@ -74,7 +74,7 @@ class NewPrivateChatController extends State<NewPrivateChat> {
         ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(
             content: Text(
-              L10n.of(context)!.unsupportedAndroidVersionLong,
+              L10n.of(context).unsupportedAndroidVersionLong,
             ),
           ),
         );
@@ -94,7 +94,7 @@ class NewPrivateChatController extends State<NewPrivateChat> {
       ClipboardData(text: Matrix.of(context).client.userID!),
     );
     ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(L10n.of(context)!.copiedToClipboard)),
+      SnackBar(content: Text(L10n.of(context).copiedToClipboard)),
     );
   }
 

lib/pages/new_private_chat/new_private_chat_view.dart

@@ -29,13 +29,13 @@ class NewPrivateChatView extends StatelessWidget {
       appBar: AppBar(
         scrolledUnderElevation: 0,
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.newChat),
+        title: Text(L10n.of(context).newChat),
         backgroundColor: theme.scaffoldBackgroundColor,
         actions: [
           TextButton(
             onPressed:
                 UrlLauncher(context, AppConfig.startChatTutorial).launchUrl,
-            child: Text(L10n.of(context)!.help),
+            child: Text(L10n.of(context).help),
           ),
         ],
       ),
@@ -53,7 +53,7 @@ class NewPrivateChatView extends StatelessWidget {
                 controller: controller.controller,
                 onChanged: controller.searchUsers,
                 decoration: InputDecoration(
-                  hintText: L10n.of(context)!.searchForUsers,
+                  hintText: L10n.of(context).searchForUsers,
                   filled: true,
                   fillColor: theme.colorScheme.secondaryContainer,
                   border: OutlineInputBorder(
@@ -110,7 +110,7 @@ class NewPrivateChatView extends StatelessWidget {
                         TextSpan(
                           children: [
                             TextSpan(
-                              text: L10n.of(context)!.yourGlobalUserIdIs,
+                              text: L10n.of(context).yourGlobalUserIdIs,
                             ),
                             TextSpan(
                               text: Matrix.of(context).client.userID,
@@ -133,7 +133,7 @@ class NewPrivateChatView extends StatelessWidget {
                         foregroundColor: theme.colorScheme.onSecondaryContainer,
                         child: Icon(Icons.adaptive.share_outlined),
                       ),
-                      title: Text(L10n.of(context)!.shareInviteLink),
+                      title: Text(L10n.of(context).shareInviteLink),
                       onTap: controller.inviteAction,
                     ),
                     ListTile(
@@ -142,7 +142,7 @@ class NewPrivateChatView extends StatelessWidget {
                         foregroundColor: theme.colorScheme.onTertiaryContainer,
                         child: const Icon(Icons.group_add_outlined),
                       ),
-                      title: Text(L10n.of(context)!.createGroup),
+                      title: Text(L10n.of(context).createGroup),
                       onTap: () => context.go('/rooms/newgroup'),
                     ),
                     if (PlatformInfos.isMobile)
@@ -152,7 +152,7 @@ class NewPrivateChatView extends StatelessWidget {
                           foregroundColor: theme.colorScheme.onPrimaryContainer,
                           child: const Icon(Icons.qr_code_scanner_outlined),
                         ),
-                        title: Text(L10n.of(context)!.scanQrCode),
+                        title: Text(L10n.of(context).scanQrCode),
                         onTap: controller.openScannerAction,
                       ),
                     Center(
@@ -207,7 +207,7 @@ class NewPrivateChatView extends StatelessWidget {
                           OutlinedButton.icon(
                             onPressed: controller.searchUsers,
                             icon: const Icon(Icons.refresh_outlined),
-                            label: Text(L10n.of(context)!.tryAgain),
+                            label: Text(L10n.of(context).tryAgain),
                           ),
                         ],
                       );
@@ -225,7 +225,7 @@ class NewPrivateChatView extends StatelessWidget {
                           Padding(
                             padding: const EdgeInsets.all(16.0),
                             child: Text(
-                              L10n.of(context)!.noUsersFoundWithQuery(
+                              L10n.of(context).noUsersFoundWithQuery(
                                 controller.controller.text,
                               ),
                               style: TextStyle(

lib/pages/new_private_chat/qr_scanner_modal.dart

@@ -35,9 +35,9 @@ class QrScannerModalState extends State<QrScannerModal> {
         leading: IconButton(
           icon: const Icon(Icons.close_outlined),
           onPressed: Navigator.of(context).pop,
-          tooltip: L10n.of(context)!.close,
+          tooltip: L10n.of(context).close,
         ),
-        title: Text(L10n.of(context)!.scanQrCode),
+        title: Text(L10n.of(context).scanQrCode),
       ),
       body: Stack(
         children: [

lib/pages/new_space/new_space.dart

@@ -52,7 +52,7 @@ class NewSpaceController extends State<NewSpace> {
     });
     if (nameController.text.isEmpty) {
       setState(() {
-        nameError = L10n.of(context)!.pleaseChoose;
+        nameError = L10n.of(context).pleaseChoose;
       });
       return;
     }

lib/pages/new_space/new_space_view.dart

@@ -16,7 +16,7 @@ class NewSpaceView extends StatelessWidget {
     final avatar = controller.avatar;
     return Scaffold(
       appBar: AppBar(
-        title: Text(L10n.of(context)!.createNewSpace),
+        title: Text(L10n.of(context).createNewSpace),
       ),
       body: MaxWidthBody(
         child: Column(
@@ -51,7 +51,7 @@ class NewSpaceView extends StatelessWidget {
                 readOnly: controller.loading,
                 decoration: InputDecoration(
                   prefixIcon: const Icon(Icons.people_outlined),
-                  labelText: L10n.of(context)!.spaceName,
+                  labelText: L10n.of(context).spaceName,
                   errorText: controller.nameError,
                 ),
               ),
@@ -59,7 +59,7 @@ class NewSpaceView extends StatelessWidget {
             const SizedBox(height: 16),
             SwitchListTile.adaptive(
               contentPadding: const EdgeInsets.symmetric(horizontal: 32),
-              title: Text(L10n.of(context)!.spaceIsPublic),
+              title: Text(L10n.of(context).spaceIsPublic),
               value: controller.publicGroup,
               onChanged: controller.setPublicGroup,
             ),
@@ -69,7 +69,7 @@ class NewSpaceView extends StatelessWidget {
                 padding: EdgeInsets.symmetric(horizontal: 16.0),
                 child: Icon(Icons.info_outlined),
               ),
-              subtitle: Text(L10n.of(context)!.newSpaceDescription),
+              subtitle: Text(L10n.of(context).newSpaceDescription),
             ),
             Padding(
               padding: const EdgeInsets.all(16.0),
@@ -80,7 +80,7 @@ class NewSpaceView extends StatelessWidget {
                       controller.loading ? null : controller.submitAction,
                   child: controller.loading
                       ? const LinearProgressIndicator()
-                      : Text(L10n.of(context)!.createNewSpace),
+                      : Text(L10n.of(context).createNewSpace),
                 ),
               ),
             ),

lib/pages/settings/settings.dart

@@ -36,9 +36,9 @@ class SettingsController extends State<Settings> {
     final input = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.editDisplayname,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).editDisplayname,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
           initialText: profile?.displayName ??
@@ -63,11 +63,11 @@ class SettingsController extends State<Settings> {
     if (await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.areYouSureYouWantToLogout,
-          message: L10n.of(context)!.noBackupWarning,
+          title: L10n.of(context).areYouSureYouWantToLogout,
+          message: L10n.of(context).noBackupWarning,
           isDestructiveAction: noBackup,
-          okLabel: L10n.of(context)!.logout,
-          cancelLabel: L10n.of(context)!.cancel,
+          okLabel: L10n.of(context).logout,
+          cancelLabel: L10n.of(context).cancel,
         ) ==
         OkCancelResult.cancel) {
       return;
@@ -85,19 +85,19 @@ class SettingsController extends State<Settings> {
       if (PlatformInfos.isMobile)
         SheetAction(
           key: AvatarAction.camera,
-          label: L10n.of(context)!.openCamera,
+          label: L10n.of(context).openCamera,
           isDefaultAction: true,
           icon: Icons.camera_alt_outlined,
         ),
       SheetAction(
         key: AvatarAction.file,
-        label: L10n.of(context)!.openGallery,
+        label: L10n.of(context).openGallery,
         icon: Icons.photo_outlined,
       ),
       if (profile?.avatarUrl != null)
         SheetAction(
           key: AvatarAction.remove,
-          label: L10n.of(context)!.removeYourAvatar,
+          label: L10n.of(context).removeYourAvatar,
           isDestructiveAction: true,
           icon: Icons.delete_outlined,
         ),
@@ -106,7 +106,7 @@ class SettingsController extends State<Settings> {
         ? actions.single.key
         : await showModalActionSheet<AvatarAction>(
             context: context,
-            title: L10n.of(context)!.changeYourAvatar,
+            title: L10n.of(context).changeYourAvatar,
             actions: actions,
           );
     if (action == null) return;
@@ -189,9 +189,9 @@ class SettingsController extends State<Settings> {
     if (showChatBackupBanner != true) {
       showOkAlertDialog(
         context: context,
-        title: L10n.of(context)!.chatBackup,
-        message: L10n.of(context)!.onlineKeyBackupEnabled,
-        okLabel: L10n.of(context)!.close,
+        title: L10n.of(context).chatBackup,
+        message: L10n.of(context).onlineKeyBackupEnabled,
+        okLabel: L10n.of(context).close,
       );
       return;
     }

lib/pages/settings/settings_view.dart

@@ -28,7 +28,7 @@ class SettingsView extends StatelessWidget {
             onPressed: () => context.go('/rooms'),
           ),
         ),
-        title: Text(L10n.of(context)!.settings),
+        title: Text(L10n.of(context).settings),
       ),
       body: ListTileTheme(
         iconColor: theme.colorScheme.onSurface,
@@ -40,7 +40,7 @@ class SettingsView extends StatelessWidget {
               builder: (context, snapshot) {
                 final profile = snapshot.data;
                 final mxid =
-                    Matrix.of(context).client.userID ?? L10n.of(context)!.user;
+                    Matrix.of(context).client.userID ?? L10n.of(context).user;
                 final displayname =
                     profile?.displayName ?? mxid.localpart ?? mxid;
                 return Row(
@@ -118,7 +118,7 @@ class SettingsView extends StatelessWidget {
             if (showChatBackupBanner == null)
               ListTile(
                 leading: const Icon(Icons.backup_outlined),
-                title: Text(L10n.of(context)!.chatBackup),
+                title: Text(L10n.of(context).chatBackup),
                 trailing: const CircularProgressIndicator.adaptive(),
               )
             else
@@ -126,7 +126,7 @@ class SettingsView extends StatelessWidget {
                 controlAffinity: ListTileControlAffinity.trailing,
                 value: controller.showChatBackupBanner == false,
                 secondary: const Icon(Icons.backup_outlined),
-                title: Text(L10n.of(context)!.chatBackup),
+                title: Text(L10n.of(context).chatBackup),
                 onChanged: controller.firstRunBootstrapAction,
               ),
             Divider(
@@ -134,49 +134,49 @@ class SettingsView extends StatelessWidget {
             ),
             ListTile(
               leading: const Icon(Icons.format_paint_outlined),
-              title: Text(L10n.of(context)!.changeTheme),
+              title: Text(L10n.of(context).changeTheme),
               onTap: () => context.go('/rooms/settings/style'),
             ),
             ListTile(
               leading: const Icon(Icons.notifications_outlined),
-              title: Text(L10n.of(context)!.notifications),
+              title: Text(L10n.of(context).notifications),
               onTap: () => context.go('/rooms/settings/notifications'),
             ),
             ListTile(
               leading: const Icon(Icons.devices_outlined),
-              title: Text(L10n.of(context)!.devices),
+              title: Text(L10n.of(context).devices),
               onTap: () => context.go('/rooms/settings/devices'),
             ),
             ListTile(
               leading: const Icon(Icons.forum_outlined),
-              title: Text(L10n.of(context)!.chat),
+              title: Text(L10n.of(context).chat),
               onTap: () => context.go('/rooms/settings/chat'),
             ),
             ListTile(
               leading: const Icon(Icons.shield_outlined),
-              title: Text(L10n.of(context)!.security),
+              title: Text(L10n.of(context).security),
               onTap: () => context.go('/rooms/settings/security'),
             ),
             Divider(color: theme.dividerColor),
             ListTile(
               leading: const Icon(Icons.help_outline_outlined),
-              title: Text(L10n.of(context)!.help),
+              title: Text(L10n.of(context).help),
               onTap: () => launchUrlString(AppConfig.supportUrl),
             ),
             ListTile(
               leading: const Icon(Icons.shield_sharp),
-              title: Text(L10n.of(context)!.privacy),
+              title: Text(L10n.of(context).privacy),
               onTap: () => launchUrlString(AppConfig.privacyUrl),
             ),
             ListTile(
               leading: const Icon(Icons.info_outline_rounded),
-              title: Text(L10n.of(context)!.about),
+              title: Text(L10n.of(context).about),
               onTap: () => PlatformInfos.showDialog(context),
             ),
             Divider(color: theme.dividerColor),
             ListTile(
               leading: const Icon(Icons.logout_outlined),
-              title: Text(L10n.of(context)!.logout),
+              title: Text(L10n.of(context).logout),
               onTap: controller.logoutAction,
             ),
           ],

lib/pages/settings_3pid/settings_3pid.dart

@@ -22,12 +22,12 @@ class Settings3PidController extends State<Settings3Pid> {
     final input = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.enterAnEmailAddress,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).enterAnEmailAddress,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
-          hintText: L10n.of(context)!.enterAnEmailAddress,
+          hintText: L10n.of(context).enterAnEmailAddress,
           keyboardType: TextInputType.emailAddress,
         ),
       ],
@@ -46,9 +46,9 @@ class Settings3PidController extends State<Settings3Pid> {
     final ok = await showOkAlertDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.weSentYouAnEmail,
-      message: L10n.of(context)!.pleaseClickOnLink,
-      okLabel: L10n.of(context)!.iHaveClickedOnLink,
+      title: L10n.of(context).weSentYouAnEmail,
+      message: L10n.of(context).pleaseClickOnLink,
+      okLabel: L10n.of(context).iHaveClickedOnLink,
     );
     if (ok != OkCancelResult.ok) return;
     final success = await showFutureLoadingDialog(
@@ -71,9 +71,9 @@ class Settings3PidController extends State<Settings3Pid> {
     if (await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.areYouSure,
-          okLabel: L10n.of(context)!.yes,
-          cancelLabel: L10n.of(context)!.cancel,
+          title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).yes,
+          cancelLabel: L10n.of(context).cancel,
         ) !=
         OkCancelResult.ok) {
       return;

lib/pages/settings_3pid/settings_3pid_view.dart

@@ -20,12 +20,12 @@ class Settings3PidView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.passwordRecovery),
+        title: Text(L10n.of(context).passwordRecovery),
         actions: [
           IconButton(
             icon: const Icon(Icons.add_outlined),
             onPressed: controller.add3PidAction,
-            tooltip: L10n.of(context)!.addEmail,
+            tooltip: L10n.of(context).addEmail,
           ),
         ],
       ),
@@ -66,8 +66,8 @@ class Settings3PidView extends StatelessWidget {
                   ),
                   title: Text(
                     identifier.isEmpty
-                        ? L10n.of(context)!.noPasswordRecoveryDescription
-                        : L10n.of(context)!
+                        ? L10n.of(context).noPasswordRecoveryDescription
+                        : L10n.of(context)
                             .withTheseAddressesRecoveryDescription,
                   ),
                 ),
@@ -83,7 +83,7 @@ class Settings3PidView extends StatelessWidget {
                       ),
                       title: Text(identifier[i].address),
                       trailing: IconButton(
-                        tooltip: L10n.of(context)!.delete,
+                        tooltip: L10n.of(context).delete,
                         icon: const Icon(Icons.delete_forever_outlined),
                         color: Colors.red,
                         onPressed: () => controller.delete3Pid(identifier[i]),

lib/pages/settings_chat/settings_chat_view.dart

@@ -21,54 +21,54 @@ class SettingsChatView extends StatelessWidget {
     final theme = Theme.of(context);
 
     return Scaffold(
-      appBar: AppBar(title: Text(L10n.of(context)!.chat)),
+      appBar: AppBar(title: Text(L10n.of(context).chat)),
       body: ListTileTheme(
         iconColor: theme.textTheme.bodyLarge!.color,
         child: MaxWidthBody(
           child: Column(
             children: [
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.formattedMessages,
-                subtitle: L10n.of(context)!.formattedMessagesDescription,
+                title: L10n.of(context).formattedMessages,
+                subtitle: L10n.of(context).formattedMessagesDescription,
                 onChanged: (b) => AppConfig.renderHtml = b,
                 storeKey: SettingKeys.renderHtml,
                 defaultValue: AppConfig.renderHtml,
               ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.hideMemberChangesInPublicChats,
-                subtitle: L10n.of(context)!.hideMemberChangesInPublicChatsBody,
+                title: L10n.of(context).hideMemberChangesInPublicChats,
+                subtitle: L10n.of(context).hideMemberChangesInPublicChatsBody,
                 onChanged: (b) => AppConfig.hideUnimportantStateEvents = b,
                 storeKey: SettingKeys.hideUnimportantStateEvents,
                 defaultValue: AppConfig.hideUnimportantStateEvents,
               ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.hideRedactedMessages,
-                subtitle: L10n.of(context)!.hideRedactedMessagesBody,
+                title: L10n.of(context).hideRedactedMessages,
+                subtitle: L10n.of(context).hideRedactedMessagesBody,
                 onChanged: (b) => AppConfig.hideRedactedEvents = b,
                 storeKey: SettingKeys.hideRedactedEvents,
                 defaultValue: AppConfig.hideRedactedEvents,
               ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.hideInvalidOrUnknownMessageFormats,
+                title: L10n.of(context).hideInvalidOrUnknownMessageFormats,
                 onChanged: (b) => AppConfig.hideUnknownEvents = b,
                 storeKey: SettingKeys.hideUnknownEvents,
                 defaultValue: AppConfig.hideUnknownEvents,
               ),
               if (PlatformInfos.isMobile)
                 SettingsSwitchListTile.adaptive(
-                  title: L10n.of(context)!.autoplayImages,
+                  title: L10n.of(context).autoplayImages,
                   onChanged: (b) => AppConfig.autoplayImages = b,
                   storeKey: SettingKeys.autoplayImages,
                   defaultValue: AppConfig.autoplayImages,
                 ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.sendOnEnter,
+                title: L10n.of(context).sendOnEnter,
                 onChanged: (b) => AppConfig.sendOnEnter = b,
                 storeKey: SettingKeys.sendOnEnter,
                 defaultValue: AppConfig.sendOnEnter ?? !PlatformInfos.isMobile,
               ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.swipeRightToLeftToReply,
+                title: L10n.of(context).swipeRightToLeftToReply,
                 onChanged: (b) => AppConfig.swipeRightToLeftToReply = b,
                 storeKey: SettingKeys.swipeRightToLeftToReply,
                 defaultValue: AppConfig.swipeRightToLeftToReply,
@@ -76,7 +76,7 @@ class SettingsChatView extends StatelessWidget {
               Divider(color: theme.dividerColor),
               ListTile(
                 title: Text(
-                  L10n.of(context)!.customEmojisAndStickers,
+                  L10n.of(context).customEmojisAndStickers,
                   style: TextStyle(
                     color: theme.colorScheme.secondary,
                     fontWeight: FontWeight.bold,
@@ -84,8 +84,8 @@ class SettingsChatView extends StatelessWidget {
                 ),
               ),
               ListTile(
-                title: Text(L10n.of(context)!.customEmojisAndStickers),
-                subtitle: Text(L10n.of(context)!.customEmojisAndStickersBody),
+                title: Text(L10n.of(context).customEmojisAndStickers),
+                subtitle: Text(L10n.of(context).customEmojisAndStickersBody),
                 onTap: () => context.go('/rooms/settings/chat/emotes'),
                 trailing: const Padding(
                   padding: EdgeInsets.all(16.0),
@@ -95,7 +95,7 @@ class SettingsChatView extends StatelessWidget {
               Divider(color: theme.dividerColor),
               ListTile(
                 title: Text(
-                  L10n.of(context)!.calls,
+                  L10n.of(context).calls,
                   style: TextStyle(
                     color: theme.colorScheme.secondary,
                     fontWeight: FontWeight.bold,
@@ -103,7 +103,7 @@ class SettingsChatView extends StatelessWidget {
                 ),
               ),
               SettingsSwitchListTile.adaptive(
-                title: L10n.of(context)!.experimentalVideoCalls,
+                title: L10n.of(context).experimentalVideoCalls,
                 onChanged: (b) {
                   AppConfig.experimentalVoip = b;
                   Matrix.of(context).createVoipPlugin();
@@ -114,7 +114,7 @@ class SettingsChatView extends StatelessWidget {
               ),
               if (PlatformInfos.isMobile)
                 ListTile(
-                  title: Text(L10n.of(context)!.callingPermissions),
+                  title: Text(L10n.of(context).callingPermissions),
                   onTap: () =>
                       CallKeepManager().checkoutPhoneAccountSetting(context),
                   trailing: const Padding(

lib/pages/settings_emotes/import_archive_dialog.dart

@@ -44,7 +44,7 @@ class _ImportEmoteArchiveDialogState extends State<ImportEmoteArchiveDialog> {
   @override
   Widget build(BuildContext context) {
     return AlertDialog(
-      title: Text(L10n.of(context)!.importEmojis),
+      title: Text(L10n.of(context).importEmojis),
       content: _loading
           ? Center(
               child: CircularProgressIndicator(
@@ -73,7 +73,7 @@ class _ImportEmoteArchiveDialogState extends State<ImportEmoteArchiveDialog> {
       actions: [
         TextButton(
           onPressed: _loading ? null : Navigator.of(context).pop,
-          child: Text(L10n.of(context)!.cancel),
+          child: Text(L10n.of(context).cancel),
         ),
         TextButton(
           onPressed: _loading
@@ -81,7 +81,7 @@ class _ImportEmoteArchiveDialogState extends State<ImportEmoteArchiveDialog> {
               : _importMap.isNotEmpty
                   ? _addEmotePack
                   : null,
-          child: Text(L10n.of(context)!.importNow),
+          child: Text(L10n.of(context).importNow),
         ),
       ],
     );
@@ -121,10 +121,10 @@ class _ImportEmoteArchiveDialogState extends State<ImportEmoteArchiveDialog> {
           final result = await showOkCancelAlertDialog(
             useRootNavigator: false,
             context: context,
-            title: L10n.of(context)!.emoteExists,
+            title: L10n.of(context).emoteExists,
             message: imageCode,
-            cancelLabel: L10n.of(context)!.replace,
-            okLabel: L10n.of(context)!.skip,
+            cancelLabel: L10n.of(context).replace,
+            okLabel: L10n.of(context).skip,
           );
           completer.complete(result);
         });
@@ -242,7 +242,7 @@ class _EmojiImportPreviewState extends State<_EmojiImportPreview> {
         IconButton(
           onPressed: widget.onRemove,
           icon: const Icon(Icons.remove_circle),
-          tooltip: L10n.of(context)!.remove,
+          tooltip: L10n.of(context).remove,
         ),
         ValueListenableBuilder(
           valueListenable: hasErrorNotifier,
@@ -278,7 +278,7 @@ class _EmojiImportPreviewState extends State<_EmojiImportPreview> {
                     minLines: 1,
                     maxLines: 1,
                     decoration: InputDecoration(
-                      hintText: L10n.of(context)!.emoteShortcode,
+                      hintText: L10n.of(context).emoteShortcode,
                       prefixText: ': ',
                       suffixText: ':',
                       border: const OutlineInputBorder(),
@@ -329,7 +329,7 @@ class _ImageFileError extends StatelessWidget {
           children: [
             const Icon(Icons.error),
             Text(
-              L10n.of(context)!.notAnImage,
+              L10n.of(context).notAnImage,
               textAlign: TextAlign.center,
               style: theme.textTheme.labelSmall,
             ),

lib/pages/settings_emotes/settings_emotes.dart

@@ -139,8 +139,8 @@ class EmotesSettingsController extends State<EmotesSettings> {
       showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.emoteExists,
-        okLabel: L10n.of(context)!.ok,
+        message: L10n.of(context).emoteExists,
+        okLabel: L10n.of(context).ok,
       );
       return;
     }
@@ -149,8 +149,8 @@ class EmotesSettingsController extends State<EmotesSettings> {
       showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.emoteInvalid,
-        okLabel: L10n.of(context)!.ok,
+        message: L10n.of(context).emoteInvalid,
+        okLabel: L10n.of(context).ok,
       );
       return;
     }
@@ -185,8 +185,8 @@ class EmotesSettingsController extends State<EmotesSettings> {
       await showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.emoteWarnNeedToPick,
-        okLabel: L10n.of(context)!.ok,
+        message: L10n.of(context).emoteWarnNeedToPick,
+        okLabel: L10n.of(context).ok,
       );
       return;
     }
@@ -195,8 +195,8 @@ class EmotesSettingsController extends State<EmotesSettings> {
       await showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.emoteExists,
-        okLabel: L10n.of(context)!.ok,
+        message: L10n.of(context).emoteExists,
+        okLabel: L10n.of(context).ok,
       );
       return;
     }
@@ -204,8 +204,8 @@ class EmotesSettingsController extends State<EmotesSettings> {
       await showOkAlertDialog(
         useRootNavigator: false,
         context: context,
-        message: L10n.of(context)!.emoteInvalid,
-        okLabel: L10n.of(context)!.ok,
+        message: L10n.of(context).emoteInvalid,
+        okLabel: L10n.of(context).ok,
       );
       return;
     }

lib/pages/settings_emotes/settings_emotes_view.dart

@@ -26,7 +26,7 @@ class EmotesSettingsView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.customEmojisAndStickers),
+        title: Text(L10n.of(context).customEmojisAndStickers),
         actions: [
           PopupMenuButton<PopupMenuEmojiActions>(
             onSelected: (value) {
@@ -43,11 +43,11 @@ class EmotesSettingsView extends StatelessWidget {
             itemBuilder: (context) => [
               PopupMenuItem(
                 value: PopupMenuEmojiActions.import,
-                child: Text(L10n.of(context)!.importFromZipFile),
+                child: Text(L10n.of(context).importFromZipFile),
               ),
               PopupMenuItem(
                 value: PopupMenuEmojiActions.export,
-                child: Text(L10n.of(context)!.exportEmotePack),
+                child: Text(L10n.of(context).exportEmotePack),
               ),
             ],
           ),
@@ -83,7 +83,7 @@ class EmotesSettingsView extends StatelessWidget {
                       minLines: 1,
                       maxLines: 1,
                       decoration: InputDecoration(
-                        hintText: L10n.of(context)!.emoteShortcode,
+                        hintText: L10n.of(context).emoteShortcode,
                         prefixText: ': ',
                         suffixText: ':',
                         prefixStyle: TextStyle(
@@ -114,7 +114,7 @@ class EmotesSettingsView extends StatelessWidget {
               ),
             if (controller.room != null)
               SwitchListTile.adaptive(
-                title: Text(L10n.of(context)!.enableEmotesGlobally),
+                title: Text(L10n.of(context).enableEmotesGlobally),
                 value: controller.isGloballyActive(client),
                 onChanged: controller.setIsGloballyActive,
               ),
@@ -125,7 +125,7 @@ class EmotesSettingsView extends StatelessWidget {
                     child: Padding(
                       padding: const EdgeInsets.all(16),
                       child: Text(
-                        L10n.of(context)!.noEmotesFound,
+                        L10n.of(context).noEmotesFound,
                         style: const TextStyle(fontSize: 20),
                       ),
                     ),
@@ -186,7 +186,7 @@ class EmotesSettingsView extends StatelessWidget {
                                 minLines: 1,
                                 maxLines: 1,
                                 decoration: InputDecoration(
-                                  hintText: L10n.of(context)!.emoteShortcode,
+                                  hintText: L10n.of(context).emoteShortcode,
                                   prefixText: ': ',
                                   suffixText: ':',
                                   prefixStyle: TextStyle(
@@ -269,7 +269,7 @@ class _ImagePickerState extends State<_ImagePicker> {
     if (widget.controller.value == null) {
       return ElevatedButton(
         onPressed: () => widget.onPressed(widget.controller),
-        child: Text(L10n.of(context)!.pickImage),
+        child: Text(L10n.of(context).pickImage),
       );
     } else {
       return _EmoteImage(widget.controller.value!.url);

lib/pages/settings_ignore_list/settings_ignore_list.dart

@@ -35,7 +35,7 @@ class SettingsIgnoreListController extends State<SettingsIgnoreList> {
     if (userId.isEmpty) return;
     if (!userId.isValidMatrixId || userId.sigil != '@') {
       setState(() {
-        errorText = L10n.of(context)!.invalidInput;
+        errorText = L10n.of(context).invalidInput;
       });
       return;
     }

lib/pages/settings_ignore_list/settings_ignore_list_view.dart

@@ -22,7 +22,7 @@ class SettingsIgnoreListView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.blockedUsers),
+        title: Text(L10n.of(context).blockedUsers),
       ),
       body: MaxWidthBody(
         withScrolling: false,
@@ -43,9 +43,9 @@ class SettingsIgnoreListView extends StatelessWidget {
                       errorText: controller.errorText,
                       hintText: '@bad_guy:domain.abc',
                       floatingLabelBehavior: FloatingLabelBehavior.always,
-                      labelText: L10n.of(context)!.blockUsername,
+                      labelText: L10n.of(context).blockUsername,
                       suffixIcon: IconButton(
-                        tooltip: L10n.of(context)!.block,
+                        tooltip: L10n.of(context).block,
                         icon: const Icon(Icons.add),
                         onPressed: () => controller.ignoreUser(context),
                       ),
@@ -53,7 +53,7 @@ class SettingsIgnoreListView extends StatelessWidget {
                   ),
                   const SizedBox(height: 16),
                   Text(
-                    L10n.of(context)!.blockListDescription,
+                    L10n.of(context).blockListDescription,
                     style: const TextStyle(color: Colors.orange),
                   ),
                 ],
@@ -89,7 +89,7 @@ class SettingsIgnoreListView extends StatelessWidget {
                         subtitle:
                             Text(s.data?.userId ?? client.ignoredUsers[i]),
                         trailing: IconButton(
-                          tooltip: L10n.of(context)!.delete,
+                          tooltip: L10n.of(context).delete,
                           icon: const Icon(Icons.delete_outlined),
                           onPressed: () => showFutureLoadingDialog(
                             context: context,

lib/pages/settings_multiple_emotes/settings_multiple_emotes_view.dart

@@ -18,7 +18,7 @@ class MultipleEmotesSettingsView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.emotePacks),
+        title: Text(L10n.of(context).emotePacks),
       ),
       body: StreamBuilder(
         stream: room.client.onRoomState.stream

lib/pages/settings_notifications/settings_notifications.dart

@@ -19,37 +19,37 @@ class NotificationSettingsItem {
     NotificationSettingsItem(
       PushRuleKind.underride,
       '.m.rule.message',
-      (c) => L10n.of(c)!.allRooms,
+      (c) => L10n.of(c).allRooms,
     ),
     NotificationSettingsItem(
       PushRuleKind.underride,
       '.m.rule.room_one_to_one',
-      (c) => L10n.of(c)!.directChats,
+      (c) => L10n.of(c).directChats,
     ),
     NotificationSettingsItem(
       PushRuleKind.override,
       '.m.rule.contains_display_name',
-      (c) => L10n.of(c)!.containsDisplayName,
+      (c) => L10n.of(c).containsDisplayName,
     ),
     NotificationSettingsItem(
       PushRuleKind.content,
       '.m.rule.contains_user_name',
-      (c) => L10n.of(c)!.containsUserName,
+      (c) => L10n.of(c).containsUserName,
     ),
     NotificationSettingsItem(
       PushRuleKind.override,
       '.m.rule.invite_for_me',
-      (c) => L10n.of(c)!.inviteForMe,
+      (c) => L10n.of(c).inviteForMe,
     ),
     NotificationSettingsItem(
       PushRuleKind.override,
       '.m.rule.member_event',
-      (c) => L10n.of(c)!.memberChanges,
+      (c) => L10n.of(c).memberChanges,
     ),
     NotificationSettingsItem(
       PushRuleKind.override,
       '.m.rule.suppress_notices',
-      (c) => L10n.of(c)!.botMessages,
+      (c) => L10n.of(c).botMessages,
     ),
   ];
 }
@@ -145,7 +145,7 @@ class SettingsNotificationsController extends State<SettingsNotifications> {
       message: '${pusher.appDisplayName} (${pusher.appId})',
       actions: [
         SheetAction(
-          label: L10n.of(context)!.delete,
+          label: L10n.of(context).delete,
           isDestructiveAction: true,
           key: true,
         ),

lib/pages/settings_notifications/settings_notifications_view.dart

@@ -18,7 +18,7 @@ class SettingsNotificationsView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.notifications),
+        title: Text(L10n.of(context).notifications),
       ),
       body: MaxWidthBody(
         child: StreamBuilder(
@@ -36,7 +36,7 @@ class SettingsNotificationsView extends StatelessWidget {
                 SwitchListTile.adaptive(
                   value: !Matrix.of(context).client.allPushNotificationsMuted,
                   title: Text(
-                    L10n.of(context)!.notificationsEnabledForThisAccount,
+                    L10n.of(context).notificationsEnabledForThisAccount,
                   ),
                   onChanged: controller.isLoading
                       ? null
@@ -45,7 +45,7 @@ class SettingsNotificationsView extends StatelessWidget {
                 Divider(color: theme.dividerColor),
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.notifyMeFor,
+                    L10n.of(context).notifyMeFor,
                     style: TextStyle(
                       color: theme.colorScheme.secondary,
                       fontWeight: FontWeight.bold,
@@ -68,7 +68,7 @@ class SettingsNotificationsView extends StatelessWidget {
                 Divider(color: theme.dividerColor),
                 ListTile(
                   title: Text(
-                    L10n.of(context)!.devices,
+                    L10n.of(context).devices,
                     style: TextStyle(
                       color: theme.colorScheme.secondary,
                       fontWeight: FontWeight.bold,
@@ -98,7 +98,7 @@ class SettingsNotificationsView extends StatelessWidget {
                       return Center(
                         child: Padding(
                           padding: const EdgeInsets.only(bottom: 16.0),
-                          child: Text(L10n.of(context)!.noOtherDevicesFound),
+                          child: Text(L10n.of(context).noOtherDevicesFound),
                         ),
                       );
                     }

lib/pages/settings_password/settings_password.dart

@@ -31,20 +31,20 @@ class SettingsPasswordController extends State<SettingsPassword> {
     });
     if (oldPasswordController.text.isEmpty) {
       setState(() {
-        oldPasswordError = L10n.of(context)!.pleaseEnterYourPassword;
+        oldPasswordError = L10n.of(context).pleaseEnterYourPassword;
       });
       return;
     }
     if (newPassword1Controller.text.isEmpty ||
         newPassword1Controller.text.length < 6) {
       setState(() {
-        newPassword1Error = L10n.of(context)!.pleaseChooseAStrongPassword;
+        newPassword1Error = L10n.of(context).pleaseChooseAStrongPassword;
       });
       return;
     }
     if (newPassword1Controller.text != newPassword2Controller.text) {
       setState(() {
-        newPassword2Error = L10n.of(context)!.passwordsDoNotMatch;
+        newPassword2Error = L10n.of(context).passwordsDoNotMatch;
       });
       return;
     }
@@ -60,7 +60,7 @@ class SettingsPasswordController extends State<SettingsPassword> {
           );
       scaffoldMessenger.showSnackBar(
         SnackBar(
-          content: Text(L10n.of(context)!.passwordHasBeenChanged),
+          content: Text(L10n.of(context).passwordHasBeenChanged),
         ),
       );
       if (mounted) context.pop();

lib/pages/settings_password/settings_password_view.dart

@@ -16,7 +16,7 @@ class SettingsPasswordView extends StatelessWidget {
 
     return Scaffold(
       appBar: AppBar(
-        title: Text(L10n.of(context)!.changePassword),
+        title: Text(L10n.of(context).changePassword),
       ),
       body: ListTileTheme(
         iconColor: theme.colorScheme.onSurface,
@@ -35,7 +35,7 @@ class SettingsPasswordView extends StatelessWidget {
                   decoration: InputDecoration(
                     prefixIcon: const Icon(Icons.lock_outlined),
                     hintText: '********',
-                    labelText: L10n.of(context)!.pleaseEnterYourCurrentPassword,
+                    labelText: L10n.of(context).pleaseEnterYourCurrentPassword,
                     errorText: controller.oldPasswordError,
                   ),
                 ),
@@ -48,7 +48,7 @@ class SettingsPasswordView extends StatelessWidget {
                   decoration: InputDecoration(
                     prefixIcon: const Icon(Icons.lock_reset_outlined),
                     hintText: '********',
-                    labelText: L10n.of(context)!.newPassword,
+                    labelText: L10n.of(context).newPassword,
                     errorText: controller.newPassword1Error,
                   ),
                 ),
@@ -61,7 +61,7 @@ class SettingsPasswordView extends StatelessWidget {
                   decoration: InputDecoration(
                     prefixIcon: const Icon(Icons.repeat_outlined),
                     hintText: '********',
-                    labelText: L10n.of(context)!.repeatPassword,
+                    labelText: L10n.of(context).repeatPassword,
                     errorText: controller.newPassword2Error,
                   ),
                 ),
@@ -73,12 +73,12 @@ class SettingsPasswordView extends StatelessWidget {
                         controller.loading ? null : controller.changePassword,
                     child: controller.loading
                         ? const LinearProgressIndicator()
-                        : Text(L10n.of(context)!.changePassword),
+                        : Text(L10n.of(context).changePassword),
                   ),
                 ),
                 const SizedBox(height: 16),
                 TextButton(
-                  child: Text(L10n.of(context)!.passwordRecoverySettings),
+                  child: Text(L10n.of(context).passwordRecoverySettings),
                   onPressed: () => context.go('/rooms/settings/security/3pid'),
                 ),
               ],

lib/pages/settings_security/settings_security.dart

@@ -25,9 +25,9 @@ class SettingsSecurityController extends State<SettingsSecurity> {
     final newLock = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.pleaseChooseAPasscode,
-      message: L10n.of(context)!.pleaseEnter4Digits,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).pleaseChooseAPasscode,
+      message: L10n.of(context).pleaseEnter4Digits,
+      cancelLabel: L10n.of(context).cancel,
       textFields: [
         DialogTextField(
           validator: (text) {
@@ -35,7 +35,7 @@ class SettingsSecurityController extends State<SettingsSecurity> {
                 (text.length == 4 && int.tryParse(text)! >= 0)) {
               return null;
             }
-            return L10n.of(context)!.pleaseEnter4Digits;
+            return L10n.of(context).pleaseEnter4Digits;
           },
           keyboardType: TextInputType.number,
           obscureText: true,
@@ -54,10 +54,10 @@ class SettingsSecurityController extends State<SettingsSecurity> {
     if (await showOkCancelAlertDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.warning,
-          message: L10n.of(context)!.deactivateAccountWarning,
-          okLabel: L10n.of(context)!.ok,
-          cancelLabel: L10n.of(context)!.cancel,
+          title: L10n.of(context).warning,
+          message: L10n.of(context).deactivateAccountWarning,
+          okLabel: L10n.of(context).ok,
+          cancelLabel: L10n.of(context).cancel,
           isDestructiveAction: true,
         ) ==
         OkCancelResult.cancel) {
@@ -67,17 +67,17 @@ class SettingsSecurityController extends State<SettingsSecurity> {
     final mxids = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.confirmMatrixId,
+      title: L10n.of(context).confirmMatrixId,
       textFields: [
         DialogTextField(
           validator: (text) => text == supposedMxid
               ? null
-              : L10n.of(context)!.supposedMxid(supposedMxid),
+              : L10n.of(context).supposedMxid(supposedMxid),
         ),
       ],
       isDestructiveAction: true,
-      okLabel: L10n.of(context)!.delete,
-      cancelLabel: L10n.of(context)!.cancel,
+      okLabel: L10n.of(context).delete,
+      cancelLabel: L10n.of(context).cancel,
     );
     if (mxids == null || mxids.length != 1 || mxids.single != supposedMxid) {
       return;
@@ -85,9 +85,9 @@ class SettingsSecurityController extends State<SettingsSecurity> {
     final input = await showTextInputDialog(
       useRootNavigator: false,
       context: context,
-      title: L10n.of(context)!.pleaseEnterYourPassword,
-      okLabel: L10n.of(context)!.ok,
-      cancelLabel: L10n.of(context)!.cancel,
+      title: L10n.of(context).pleaseEnterYourPassword,
+      okLabel: L10n.of(context).ok,
+      cancelLabel: L10n.of(context).cancel,
       isDestructiveAction: true,
       textFields: [
         const DialogTextField(

lib/pages/settings_security/settings_security_view.dart

@@ -21,7 +21,7 @@ class SettingsSecurityView extends StatelessWidget {
     final theme = Theme.of(context);
 
     return Scaffold(
-      appBar: AppBar(title: Text(L10n.of(context)!.security)),
+      appBar: AppBar(title: Text(L10n.of(context).security)),
       body: ListTileTheme(
         iconColor: theme.colorScheme.onSurface,
         child: MaxWidthBody(
@@ -45,7 +45,7 @@ class SettingsSecurityView extends StatelessWidget {
                 children: [
                   ListTile(
                     title: Text(
-                      L10n.of(context)!.privacy,
+                      L10n.of(context).privacy,
                       style: TextStyle(
                         color: theme.colorScheme.secondary,
                         fontWeight: FontWeight.bold,
@@ -53,25 +53,25 @@ class SettingsSecurityView extends StatelessWidget {
                     ),
                   ),
                   SettingsSwitchListTile.adaptive(
-                    title: L10n.of(context)!.sendTypingNotifications,
+                    title: L10n.of(context).sendTypingNotifications,
                     subtitle:
-                        L10n.of(context)!.sendTypingNotificationsDescription,
+                        L10n.of(context).sendTypingNotificationsDescription,
                     onChanged: (b) => AppConfig.sendTypingNotifications = b,
                     storeKey: SettingKeys.sendTypingNotifications,
                     defaultValue: AppConfig.sendTypingNotifications,
                   ),
                   SettingsSwitchListTile.adaptive(
-                    title: L10n.of(context)!.sendReadReceipts,
-                    subtitle: L10n.of(context)!.sendReadReceiptsDescription,
+                    title: L10n.of(context).sendReadReceipts,
+                    subtitle: L10n.of(context).sendReadReceiptsDescription,
                     onChanged: (b) => AppConfig.sendPublicReadReceipts = b,
                     storeKey: SettingKeys.sendPublicReadReceipts,
                     defaultValue: AppConfig.sendPublicReadReceipts,
                   ),
                   ListTile(
                     trailing: const Icon(Icons.chevron_right_outlined),
-                    title: Text(L10n.of(context)!.blockedUsers),
+                    title: Text(L10n.of(context).blockedUsers),
                     subtitle: Text(
-                      L10n.of(context)!.thereAreCountUsersBlocked(
+                      L10n.of(context).thereAreCountUsersBlocked(
                         Matrix.of(context).client.ignoredUsers.length,
                       ),
                     ),
@@ -82,15 +82,15 @@ class SettingsSecurityView extends StatelessWidget {
                     if (PlatformInfos.isMobile)
                       ListTile(
                         trailing: const Icon(Icons.chevron_right_outlined),
-                        title: Text(L10n.of(context)!.appLock),
-                        subtitle: Text(L10n.of(context)!.appLockDescription),
+                        title: Text(L10n.of(context).appLock),
+                        subtitle: Text(L10n.of(context).appLockDescription),
                         onTap: controller.setAppLockAction,
                       ),
                   },
                   Divider(color: theme.dividerColor),
                   ListTile(
                     title: Text(
-                      L10n.of(context)!.account,
+                      L10n.of(context).account,
                       style: TextStyle(
                         color: theme.colorScheme.secondary,
                         fontWeight: FontWeight.bold,
@@ -98,7 +98,7 @@ class SettingsSecurityView extends StatelessWidget {
                     ),
                   ),
                   ListTile(
-                    title: Text(L10n.of(context)!.yourPublicKey),
+                    title: Text(L10n.of(context).yourPublicKey),
                     leading: const Icon(Icons.vpn_key_outlined),
                     subtitle: SelectableText(
                       Matrix.of(context).client.fingerprintKey.beautified,
@@ -110,7 +110,7 @@ class SettingsSecurityView extends StatelessWidget {
                     ListTile(
                       leading: const Icon(Icons.password_outlined),
                       trailing: const Icon(Icons.chevron_right_outlined),
-                      title: Text(L10n.of(context)!.changePassword),
+                      title: Text(L10n.of(context).changePassword),
                       onTap: () =>
                           context.go('/rooms/settings/security/password'),
                     ),
@@ -118,7 +118,7 @@ class SettingsSecurityView extends StatelessWidget {
                     iconColor: Colors.orange,
                     leading: const Icon(Icons.delete_sweep_outlined),
                     title: Text(
-                      L10n.of(context)!.dehydrate,
+                      L10n.of(context).dehydrate,
                       style: const TextStyle(color: Colors.orange),
                     ),
                     onTap: controller.dehydrateAction,
@@ -128,7 +128,7 @@ class SettingsSecurityView extends StatelessWidget {
                     iconColor: Colors.red,
                     leading: const Icon(Icons.delete_outlined),
                     title: Text(
-                      L10n.of(context)!.deleteAccount,
+                      L10n.of(context).deleteAccount,
                       style: const TextStyle(color: Colors.red),
                     ),
                     onTap: controller.deleteAccountAction,

lib/pages/settings_style/settings_style_view.dart

@@ -27,7 +27,7 @@ class SettingsStyleView extends StatelessWidget {
     return Scaffold(
       appBar: AppBar(
         leading: const Center(child: BackButton()),
-        title: Text(L10n.of(context)!.changeTheme),
+        title: Text(L10n.of(context).changeTheme),
       ),
       backgroundColor: theme.colorScheme.surface,
       body: MaxWidthBody(
@@ -35,7 +35,7 @@ class SettingsStyleView extends StatelessWidget {
           children: [
             ListTile(
               title: Text(
-                L10n.of(context)!.setColorTheme,
+                L10n.of(context).setColorTheme,
                 style: TextStyle(
                   color: theme.colorScheme.secondary,
                   fontWeight: FontWeight.bold,
@@ -95,7 +95,7 @@ class SettingsStyleView extends StatelessWidget {
                                                   ),
                                                 ),
                                               Text(
-                                                L10n.of(context)!.systemTheme,
+                                                L10n.of(context).systemTheme,
                                                 textAlign: TextAlign.center,
                                                 style: TextStyle(
                                                   color: theme
@@ -140,7 +140,7 @@ class SettingsStyleView extends StatelessWidget {
             ),
             ListTile(
               title: Text(
-                L10n.of(context)!.setTheme,
+                L10n.of(context).setTheme,
                 style: TextStyle(
                   color: theme.colorScheme.secondary,
                   fontWeight: FontWeight.bold,
@@ -150,19 +150,19 @@ class SettingsStyleView extends StatelessWidget {
             RadioListTile<ThemeMode>(
               groupValue: controller.currentTheme,
               value: ThemeMode.system,
-              title: Text(L10n.of(context)!.systemTheme),
+              title: Text(L10n.of(context).systemTheme),
               onChanged: controller.switchTheme,
             ),
             RadioListTile<ThemeMode>(
               groupValue: controller.currentTheme,
               value: ThemeMode.light,
-              title: Text(L10n.of(context)!.lightTheme),
+              title: Text(L10n.of(context).lightTheme),
               onChanged: controller.switchTheme,
             ),
             RadioListTile<ThemeMode>(
               groupValue: controller.currentTheme,
               value: ThemeMode.dark,
-              title: Text(L10n.of(context)!.darkTheme),
+              title: Text(L10n.of(context).darkTheme),
               onChanged: controller.switchTheme,
             ),
             Divider(
@@ -170,7 +170,7 @@ class SettingsStyleView extends StatelessWidget {
             ),
             ListTile(
               title: Text(
-                L10n.of(context)!.overview,
+                L10n.of(context).overview,
                 style: TextStyle(
                   color: theme.colorScheme.secondary,
                   fontWeight: FontWeight.bold,
@@ -178,13 +178,13 @@ class SettingsStyleView extends StatelessWidget {
               ),
             ),
             SettingsSwitchListTile.adaptive(
-              title: L10n.of(context)!.presencesToggle,
+              title: L10n.of(context).presencesToggle,
               onChanged: (b) => AppConfig.showPresences = b,
               storeKey: SettingKeys.showPresences,
               defaultValue: AppConfig.showPresences,
             ),
             SettingsSwitchListTile.adaptive(
-              title: L10n.of(context)!.separateChatTypes,
+              title: L10n.of(context).separateChatTypes,
               onChanged: (b) => AppConfig.separateChatTypes = b,
               storeKey: SettingKeys.separateChatTypes,
               defaultValue: AppConfig.separateChatTypes,
@@ -194,7 +194,7 @@ class SettingsStyleView extends StatelessWidget {
             ),
             ListTile(
               title: Text(
-                L10n.of(context)!.messagesStyle,
+                L10n.of(context).messagesStyle,
                 style: TextStyle(
                   color: theme.colorScheme.secondary,
                   fontWeight: FontWeight.bold,
@@ -270,7 +270,7 @@ class SettingsStyleView extends StatelessWidget {
                       ),
                     ),
                     ListTile(
-                      title: Text(L10n.of(context)!.wallpaper),
+                      title: Text(L10n.of(context).wallpaper),
                       leading: const Icon(Icons.photo_outlined),
                       trailing: accountConfig.wallpaperUrl == null
                           ? null
@@ -286,7 +286,7 @@ class SettingsStyleView extends StatelessWidget {
                       curve: FluffyThemes.animationCurve,
                       child: accountConfig.wallpaperUrl != null
                           ? SwitchListTile.adaptive(
-                              title: Text(L10n.of(context)!.transparent),
+                              title: Text(L10n.of(context).transparent),
                               secondary: const Icon(Icons.blur_linear_outlined),
                               value: !wallpaperOpacityIsDefault,
                               onChanged: (_) =>
@@ -301,7 +301,7 @@ class SettingsStyleView extends StatelessWidget {
               },
             ),
             ListTile(
-              title: Text(L10n.of(context)!.fontSize),
+              title: Text(L10n.of(context).fontSize),
               trailing: Text('× ${AppConfig.fontSizeFactor}'),
             ),
             Slider.adaptive(

lib/pages/user_bottom_sheet/user_bottom_sheet.dart

@@ -98,22 +98,22 @@ class UserBottomSheetController extends State<UserBottomSheet> {
 
         final score = await showConfirmationDialog<int>(
           context: context,
-          title: L10n.of(context)!.reportUser,
-          message: L10n.of(context)!.howOffensiveIsThisContent,
-          cancelLabel: L10n.of(context)!.cancel,
-          okLabel: L10n.of(context)!.ok,
+          title: L10n.of(context).reportUser,
+          message: L10n.of(context).howOffensiveIsThisContent,
+          cancelLabel: L10n.of(context).cancel,
+          okLabel: L10n.of(context).ok,
           actions: [
             AlertDialogAction(
               key: -100,
-              label: L10n.of(context)!.extremeOffensive,
+              label: L10n.of(context).extremeOffensive,
             ),
             AlertDialogAction(
               key: -50,
-              label: L10n.of(context)!.offensive,
+              label: L10n.of(context).offensive,
             ),
             AlertDialogAction(
               key: 0,
-              label: L10n.of(context)!.inoffensive,
+              label: L10n.of(context).inoffensive,
             ),
           ],
         );
@@ -121,10 +121,10 @@ class UserBottomSheetController extends State<UserBottomSheet> {
         final reason = await showTextInputDialog(
           useRootNavigator: false,
           context: context,
-          title: L10n.of(context)!.whyDoYouWantToReportThis,
-          okLabel: L10n.of(context)!.ok,
-          cancelLabel: L10n.of(context)!.cancel,
-          textFields: [DialogTextField(hintText: L10n.of(context)!.reason)],
+          title: L10n.of(context).whyDoYouWantToReportThis,
+          okLabel: L10n.of(context).ok,
+          cancelLabel: L10n.of(context).cancel,
+          textFields: [DialogTextField(hintText: L10n.of(context).reason)],
         );
         if (reason == null || reason.single.isEmpty) return;
 
@@ -139,7 +139,7 @@ class UserBottomSheetController extends State<UserBottomSheet> {
         );
         if (result.error != null) return;
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text(L10n.of(context)!.contentHasBeenReported)),
+          SnackBar(content: Text(L10n.of(context).contentHasBeenReported)),
         );
         break;
       case UserBottomSheetAction.mention:
@@ -152,10 +152,10 @@ class UserBottomSheetController extends State<UserBottomSheet> {
         if (await showOkCancelAlertDialog(
               useRootNavigator: false,
               context: context,
-              title: L10n.of(context)!.areYouSure,
-              okLabel: L10n.of(context)!.yes,
-              cancelLabel: L10n.of(context)!.no,
-              message: L10n.of(context)!.banUserDescription,
+              title: L10n.of(context).areYouSure,
+              okLabel: L10n.of(context).yes,
+              cancelLabel: L10n.of(context).no,
+              message: L10n.of(context).banUserDescription,
             ) ==
             OkCancelResult.ok) {
           await showFutureLoadingDialog(
@@ -170,10 +170,10 @@ class UserBottomSheetController extends State<UserBottomSheet> {
         if (await showOkCancelAlertDialog(
               useRootNavigator: false,
               context: context,
-              title: L10n.of(context)!.areYouSure,
-              okLabel: L10n.of(context)!.yes,
-              cancelLabel: L10n.of(context)!.no,
-              message: L10n.of(context)!.unbanUserDescription,
+              title: L10n.of(context).areYouSure,
+              okLabel: L10n.of(context).yes,
+              cancelLabel: L10n.of(context).no,
+              message: L10n.of(context).unbanUserDescription,
             ) ==
             OkCancelResult.ok) {
           await showFutureLoadingDialog(
@@ -188,10 +188,10 @@ class UserBottomSheetController extends State<UserBottomSheet> {
         if (await showOkCancelAlertDialog(
               useRootNavigator: false,
               context: context,
-              title: L10n.of(context)!.areYouSure,
-              okLabel: L10n.of(context)!.yes,
-              cancelLabel: L10n.of(context)!.no,
-              message: L10n.of(context)!.kickUserDescription,
+              title: L10n.of(context).areYouSure,
+              okLabel: L10n.of(context).yes,
+              cancelLabel: L10n.of(context).no,
+              message: L10n.of(context).kickUserDescription,
             ) ==
             OkCancelResult.ok) {
           await showFutureLoadingDialog(
@@ -300,10 +300,10 @@ class UserBottomSheetController extends State<UserBottomSheet> {
       final consent = await showOkCancelAlertDialog(
         useRootNavigator: false,
         context: context,
-        title: L10n.of(context)!.areYouSure,
-        okLabel: L10n.of(context)!.yes,
-        cancelLabel: L10n.of(context)!.no,
-        message: L10n.of(context)!.makeAdminDescription,
+        title: L10n.of(context).areYouSure,
+        okLabel: L10n.of(context).yes,
+        cancelLabel: L10n.of(context).no,
+        message: L10n.of(context).makeAdminDescription,
       );
       if (consent != OkCancelResult.ok) return;
     }

lib/pages/user_bottom_sheet/user_bottom_sheet_view.dart

@@ -79,7 +79,7 @@ class UserBottomSheetView extends StatelessWidget {
                         title: Padding(
                           padding: const EdgeInsets.only(bottom: 12.0),
                           child: Text(
-                            L10n.of(context)!
+                            L10n.of(context)
                                 .userWouldLikeToChangeTheChat(displayname),
                           ),
                         ),
@@ -92,7 +92,7 @@ class UserBottomSheetView extends StatelessWidget {
                               ),
                               onPressed: controller.knockAccept,
                               icon: const Icon(Icons.check_outlined),
-                              label: Text(L10n.of(context)!.accept),
+                              label: Text(L10n.of(context).accept),
                             ),
                             const SizedBox(width: 12),
                             TextButton.icon(
@@ -104,7 +104,7 @@ class UserBottomSheetView extends StatelessWidget {
                               ),
                               onPressed: controller.knockDecline,
                               icon: const Icon(Icons.cancel_outlined),
-                              label: Text(L10n.of(context)!.decline),
+                              label: Text(L10n.of(context).decline),
                             ),
                           ],
                         ),
@@ -181,13 +181,13 @@ class UserBottomSheetView extends StatelessWidget {
                                   const SizedBox(width: 12),
                                   if (presence.currentlyActive == true)
                                     Text(
-                                      L10n.of(context)!.currentlyActive,
+                                      L10n.of(context).currentlyActive,
                                       overflow: TextOverflow.ellipsis,
                                       style: theme.textTheme.bodySmall,
                                     )
                                   else if (lastActiveTimestamp != null)
                                     Text(
-                                      L10n.of(context)!.lastActiveAgo(
+                                      L10n.of(context).lastActiveAgo(
                                         lastActiveTimestamp
                                             .localizedTimeShort(context),
                                       ),
@@ -238,7 +238,7 @@ class UserBottomSheetView extends StatelessWidget {
                               UserBottomSheetAction.message,
                             ),
                             icon: const Icon(Icons.chat_outlined),
-                            label: Text(L10n.of(context)!.startConversation),
+                            label: Text(L10n.of(context).startConversation),
                           )
                         : TextField(
                             controller: controller.sendController,
@@ -250,7 +250,7 @@ class UserBottomSheetView extends StatelessWidget {
                             decoration: InputDecoration(
                               errorText: controller.sendError
                                   ?.toLocalizedString(context),
-                              hintText: L10n.of(context)!.sendMessages,
+                              hintText: L10n.of(context).sendMessages,
                               suffix: controller.isSending
                                   ? const SizedBox(
                                       width: 16,
@@ -272,7 +272,7 @@ class UserBottomSheetView extends StatelessWidget {
                 if (controller.widget.onMention != null)
                   ListTile(
                     leading: const Icon(Icons.alternate_email_outlined),
-                    title: Text(L10n.of(context)!.mention),
+                    title: Text(L10n.of(context).mention),
                     onTap: () => controller
                         .participantAction(UserBottomSheetAction.mention),
                   ),
@@ -280,7 +280,7 @@ class UserBottomSheetView extends StatelessWidget {
                   Divider(color: theme.dividerColor),
                   ListTile(
                     title: Text(
-                      '${L10n.of(context)!.userRole} (${user.powerLevel})',
+                      '${L10n.of(context).userRole} (${user.powerLevel})',
                     ),
                     leading: const Icon(Icons.person_outlined),
                     trailing: Material(
@@ -304,19 +304,19 @@ class UserBottomSheetView extends StatelessWidget {
                         items: [
                           DropdownMenuItem(
                             value: 0,
-                            child: Text(L10n.of(context)!.user),
+                            child: Text(L10n.of(context).user),
                           ),
                           DropdownMenuItem(
                             value: 50,
-                            child: Text(L10n.of(context)!.moderator),
+                            child: Text(L10n.of(context).moderator),
                           ),
                           DropdownMenuItem(
                             value: 100,
-                            child: Text(L10n.of(context)!.admin),
+                            child: Text(L10n.of(context).admin),
                           ),
                           DropdownMenuItem(
                             value: null,
-                            child: Text(L10n.of(context)!.custom),
+                            child: Text(L10n.of(context).custom),
                           ),
                         ],
                       ),
@@ -328,7 +328,7 @@ class UserBottomSheetView extends StatelessWidget {
                   ListTile(
                     textColor: theme.colorScheme.error,
                     iconColor: theme.colorScheme.error,
-                    title: Text(L10n.of(context)!.kickFromChat),
+                    title: Text(L10n.of(context).kickFromChat),
                     leading: const Icon(Icons.exit_to_app_outlined),
                     onTap: () => controller
                         .participantAction(UserBottomSheetAction.kick),
@@ -339,7 +339,7 @@ class UserBottomSheetView extends StatelessWidget {
                   ListTile(
                     textColor: theme.colorScheme.onErrorContainer,
                     iconColor: theme.colorScheme.onErrorContainer,
-                    title: Text(L10n.of(context)!.banFromChat),
+                    title: Text(L10n.of(context).banFromChat),
                     leading: const Icon(Icons.warning_sharp),
                     onTap: () =>
                         controller.participantAction(UserBottomSheetAction.ban),
@@ -348,7 +348,7 @@ class UserBottomSheetView extends StatelessWidget {
                     user.canBan &&
                     user.membership == Membership.ban)
                   ListTile(
-                    title: Text(L10n.of(context)!.unbanFromChat),
+                    title: Text(L10n.of(context).unbanFromChat),
                     leading: const Icon(Icons.warning_outlined),
                     onTap: () => controller
                         .participantAction(UserBottomSheetAction.unban),
@@ -357,7 +357,7 @@ class UserBottomSheetView extends StatelessWidget {
                   ListTile(
                     textColor: theme.colorScheme.onErrorContainer,
                     iconColor: theme.colorScheme.onErrorContainer,
-                    title: Text(L10n.of(context)!.reportUser),
+                    title: Text(L10n.of(context).reportUser),
                     leading: const Icon(Icons.gavel_outlined),
                     onTap: () => controller
                         .participantAction(UserBottomSheetAction.report),
@@ -369,7 +369,7 @@ class UserBottomSheetView extends StatelessWidget {
                       color: Colors.orange,
                     ),
                     subtitle: Text(
-                      L10n.of(context)!.profileNotFound,
+                      L10n.of(context).profileNotFound,
                       style: const TextStyle(color: Colors.orange),
                     ),
                   ),
@@ -379,7 +379,7 @@ class UserBottomSheetView extends StatelessWidget {
                     textColor: theme.colorScheme.onErrorContainer,
                     iconColor: theme.colorScheme.onErrorContainer,
                     leading: const Icon(Icons.block_outlined),
-                    title: Text(L10n.of(context)!.block),
+                    title: Text(L10n.of(context).block),
                     onTap: () => controller
                         .participantAction(UserBottomSheetAction.ignore),
                   ),

lib/utils/client_manager.dart

@@ -48,8 +48,8 @@ abstract class ClientManager {
       await Future.wait(
         clients.map(
           (client) => client.initWithRestore(
-            onMigration: () {
-              final l10n = lookupL10n(PlatformDispatcher.instance.locale);
+            onMigration: () async {
+              final l10n = await lookupL10n(PlatformDispatcher.instance.locale);
               sendInitNotification(
                 l10n.databaseMigrationTitle,
                 l10n.databaseMigrationBody,

lib/utils/date_time_extension.dart

@@ -35,9 +35,9 @@ extension DateTimeExtension on DateTime {
 
   /// Returns a simple time String.
   String localizedTimeOfDay(BuildContext context) =>
-      L10n.of(context)!.alwaysUse24HourFormat == 'true'
-          ? DateFormat('HH:mm', L10n.of(context)!.localeName).format(this)
-          : DateFormat('h:mm a', L10n.of(context)!.localeName).format(this);
+      L10n.of(context).alwaysUse24HourFormat == 'true'
+          ? DateFormat('HH:mm', L10n.of(context).localeName).format(this)
+          : DateFormat('h:mm a', L10n.of(context).localeName).format(this);
 
   /// Returns [localizedTimeOfDay()] if the ChatTime is today, the name of the week
   /// day if the ChatTime is this week and a date string else.
@@ -77,7 +77,7 @@ extension DateTimeExtension on DateTime {
     final sameDay = sameYear && now.month == month && now.day == day;
 
     if (sameDay) return localizedTimeOfDay(context);
-    return L10n.of(context)!.dateAndTimeOfDay(
+    return L10n.of(context).dateAndTimeOfDay(
       localizedTimeShort(context),
       localizedTimeOfDay(context),
     );

lib/utils/error_reporter.dart

@@ -21,7 +21,7 @@ class ErrorReporter {
     await showAdaptiveDialog(
       context: context,
       builder: (context) => AlertDialog.adaptive(
-        title: Text(L10n.of(context)!.reportErrorDescription),
+        title: Text(L10n.of(context).reportErrorDescription),
         content: SizedBox(
           height: 256,
           width: 256,
@@ -36,13 +36,13 @@ class ErrorReporter {
         actions: [
           TextButton(
             onPressed: () => Navigator.of(context).pop(),
-            child: Text(L10n.of(context)!.close),
+            child: Text(L10n.of(context).close),
           ),
           TextButton(
             onPressed: () => Clipboard.setData(
               ClipboardData(text: text),
             ),
-            child: Text(L10n.of(context)!.copy),
+            child: Text(L10n.of(context).copy),
           ),
           TextButton(
             onPressed: () => launchUrl(
@@ -56,7 +56,7 @@ class ErrorReporter {
               ),
               mode: LaunchMode.externalApplication,
             ),
-            child: Text(L10n.of(context)!.report),
+            child: Text(L10n.of(context).report),
           ),
         ],
       ),

lib/utils/fluffy_share.dart

@@ -25,7 +25,7 @@ abstract class FluffyShare {
       ClipboardData(text: text),
     );
     ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text(L10n.of(context)!.copiedToClipboard)),
+      SnackBar(content: Text(L10n.of(context).copiedToClipboard)),
     );
     return;
   }
@@ -34,7 +34,7 @@ abstract class FluffyShare {
     final client = Matrix.of(context).client;
     final ownProfile = await client.fetchOwnProfile();
     await FluffyShare.share(
-      L10n.of(context)!.inviteText(
+      L10n.of(context).inviteText(
         ownProfile.displayName ?? client.userID!,
         'https://matrix.to/#/${client.userID}?client=im.fluffychat',
       ),

lib/utils/init_with_restore.dart

@@ -101,7 +101,7 @@ extension InitWithRestoreExtension on Client {
       }
     } catch (e, s) {
       Logs().wtf('Client init failed!', e, s);
-      final l10n = lookupL10n(PlatformDispatcher.instance.locale);
+      final l10n = await lookupL10n(PlatformDispatcher.instance.locale);
       final sessionBackupString = await storage?.read(key: storageKey);
       if (sessionBackupString == null) {
         ClientManager.sendInitNotification(

lib/utils/localized_exception_extension.dart

@@ -30,7 +30,7 @@ extension LocalizedExceptionExtension on Object {
   ]) {
     if (this is FileTooBigMatrixException) {
       final exception = this as FileTooBigMatrixException;
-      return L10n.of(context)!.fileIsTooBigForServer(
+      return L10n.of(context).fileIsTooBigForServer(
         _formatFileSize(exception.maxFileSize),
       );
     }
@@ -38,17 +38,17 @@ extension LocalizedExceptionExtension on Object {
       switch ((this as MatrixException).error) {
         case MatrixError.M_FORBIDDEN:
           if (exceptionContext == ExceptionContext.changePassword) {
-            return L10n.of(context)!.passwordIsWrong;
+            return L10n.of(context).passwordIsWrong;
           }
-          return L10n.of(context)!.noPermission;
+          return L10n.of(context).noPermission;
         case MatrixError.M_LIMIT_EXCEEDED:
-          return L10n.of(context)!.tooManyRequestsWarning;
+          return L10n.of(context).tooManyRequestsWarning;
         default:
           return (this as MatrixException).errorMessage;
       }
     }
     if (this is InvalidPassphraseException) {
-      return L10n.of(context)!.wrongRecoveryKey;
+      return L10n.of(context).wrongRecoveryKey;
     }
     if (this is BadServerVersionsException) {
       final serverVersions = (this as BadServerVersionsException)
@@ -61,7 +61,7 @@ extension LocalizedExceptionExtension on Object {
           .toString()
           .replaceAll('{', '"')
           .replaceAll('}', '"');
-      return L10n.of(context)!.badServerVersionsException(
+      return L10n.of(context).badServerVersionsException(
         serverVersions,
         supportedVersions,
         serverVersions,
@@ -79,7 +79,7 @@ extension LocalizedExceptionExtension on Object {
           .toString()
           .replaceAll('{', '"')
           .replaceAll('}', '"');
-      return L10n.of(context)!.badServerLoginTypesException(
+      return L10n.of(context).badServerLoginTypesException(
         serverVersions,
         supportedVersions,
         supportedVersions,
@@ -89,16 +89,16 @@ extension LocalizedExceptionExtension on Object {
         this is SocketException ||
         this is SyncConnectionException ||
         this is ClientException) {
-      return L10n.of(context)!.noConnectionToTheServer;
+      return L10n.of(context).noConnectionToTheServer;
     }
     if (this is FormatException &&
         exceptionContext == ExceptionContext.checkHomeserver) {
-      return L10n.of(context)!.doesNotSeemToBeAValidHomeserver;
+      return L10n.of(context).doesNotSeemToBeAValidHomeserver;
     }
     if (this is String) return toString();
     if (this is UiaException) return toString();
     Logs().w('Something went wrong: ', this);
-    return L10n.of(context)!.oopsSomethingWentWrong;
+    return L10n.of(context).oopsSomethingWentWrong;
   }
 }
 

lib/utils/matrix_sdk_extensions/flutter_matrix_dart_sdk_database/builder.dart

@@ -43,7 +43,7 @@ Future<DatabaseApi> flutterMatrixSdkDatabaseBuilder(Client client) async {
 
     try {
       // Send error notification:
-      final l10n = lookupL10n(PlatformDispatcher.instance.locale);
+      final l10n = await lookupL10n(PlatformDispatcher.instance.locale);
       ClientManager.sendInitNotification(
         l10n.initAppError,
         l10n.databaseBuildErrorBody(

lib/utils/matrix_sdk_extensions/flutter_matrix_dart_sdk_database/cipher.dart

@@ -57,7 +57,7 @@ void _sendNoEncryptionWarning(Object exception) async {
 
   if (isStored == true) return;
 
-  final l10n = lookupL10n(PlatformDispatcher.instance.locale);
+  final l10n = await lookupL10n(PlatformDispatcher.instance.locale);
   ClientManager.sendInitNotification(
     l10n.noDatabaseEncryption,
     exception.toString(),

lib/utils/matrix_sdk_extensions/matrix_file_extension.dart

@@ -20,7 +20,7 @@ extension MatrixFileExtension on MatrixFile {
     }
 
     final downloadPath = await FilePicker.platform.saveFile(
-      dialogTitle: L10n.of(context)!.saveFile,
+      dialogTitle: L10n.of(context).saveFile,
       fileName: name,
       type: filePickerFileType,
       bytes: bytes,
@@ -38,7 +38,7 @@ extension MatrixFileExtension on MatrixFile {
     ScaffoldMessenger.of(context).showSnackBar(
       SnackBar(
         content: Text(
-          L10n.of(context)!.fileHasBeenSavedAt(downloadPath),
+          L10n.of(context).fileHasBeenSavedAt(downloadPath),
         ),
       ),
     );

lib/utils/platform_infos.dart

@@ -52,7 +52,7 @@ abstract class PlatformInfos {
         TextButton.icon(
           onPressed: () => launchUrlString(AppConfig.sourceCodeUrl),
           icon: const Icon(Icons.source_outlined),
-          label: Text(L10n.of(context)!.sourceCode),
+          label: Text(L10n.of(context).sourceCode),
         ),
         TextButton.icon(
           onPressed: () => launchUrlString(AppConfig.emojiFontUrl),

lib/utils/push_helper.dart

@@ -35,7 +35,7 @@ Future<void> pushHelper(
   } catch (e, s) {
     Logs().v('Push Helper has crashed!', e, s);
 
-    l10n ??= lookupL10n(const Locale('en'));
+    l10n ??= await lookupL10n(const Locale('en'));
     flutterLocalNotificationsPlugin.show(
       notification.roomId?.hashCode ?? 0,
       l10n.newMessageInFluffyChat,

lib/utils/room_status_extension.dart

@@ -12,24 +12,24 @@ extension RoomStatusExtension on Room {
     typingUsers.removeWhere((User u) => u.id == client.userID);
 
     if (AppConfig.hideTypingUsernames) {
-      typingText = L10n.of(context)!.isTyping;
+      typingText = L10n.of(context).isTyping;
       if (typingUsers.first.id != directChatMatrixID) {
         typingText =
-            L10n.of(context)!.numUsersTyping(typingUsers.length.toString());
+            L10n.of(context).numUsersTyping(typingUsers.length.toString());
       }
     } else if (typingUsers.length == 1) {
-      typingText = L10n.of(context)!.isTyping;
+      typingText = L10n.of(context).isTyping;
       if (typingUsers.first.id != directChatMatrixID) {
         typingText =
-            L10n.of(context)!.userIsTyping(typingUsers.first.calcDisplayname());
+            L10n.of(context).userIsTyping(typingUsers.first.calcDisplayname());
       }
     } else if (typingUsers.length == 2) {
-      typingText = L10n.of(context)!.userAndUserAreTyping(
+      typingText = L10n.of(context).userAndUserAreTyping(
         typingUsers.first.calcDisplayname(),
         typingUsers[1].calcDisplayname(),
       );
     } else if (typingUsers.length > 2) {
-      typingText = L10n.of(context)!.userAndOthersAreTyping(
+      typingText = L10n.of(context).userAndOthersAreTyping(
         typingUsers.first.calcDisplayname(),
         (typingUsers.length - 1).toString(),
       );

lib/utils/show_update_snackbar.dart

@@ -35,13 +35,13 @@ abstract class UpdateNotifier {
                 ),
                 Expanded(
                   child: Text(
-                    L10n.of(context)!.updateInstalled(currentVersion),
+                    L10n.of(context).updateInstalled(currentVersion),
                   ),
                 ),
               ],
             ),
             action: SnackBarAction(
-              label: L10n.of(context)!.changelog,
+              label: L10n.of(context).changelog,
               onPressed: () => launchUrlString(AppConfig.changelogUrl),
             ),
           ),