better loading indicators for timetables, talk and files

lib/api/marianumcloud/talk/chat/getChatCache.dart

@@ -8,7 +8,15 @@ import 'getChatResponse.dart';
 class GetChatCache extends RequestCache<GetChatResponse> {
   String chatToken;
 
-  GetChatCache({required void Function(GetChatResponse) onUpdate, required this.chatToken}) : super(RequestCache.cacheNothing, onUpdate) {
+  GetChatCache({
+    required void Function(GetChatResponse) onUpdate,
+    void Function(Exception)? onError,
+    required this.chatToken,
+  }) : super(
+          RequestCache.cacheNothing,
+          onUpdate,
+          onError: onError ?? RequestCache.ignore,
+        ) {
     start('nc-chat-$chatToken');
   }
 

lib/api/marianumcloud/talk/room/getRoomCache.dart

@@ -7,7 +7,16 @@ import 'getRoomParams.dart';
 import 'getRoomResponse.dart';
 
 class GetRoomCache extends RequestCache<GetRoomResponse> {
-  GetRoomCache({void Function(GetRoomResponse)? onUpdate, bool? renew}) : super(RequestCache.cacheMinute, onUpdate, renew: renew) {
+  GetRoomCache({
+    void Function(GetRoomResponse)? onUpdate,
+    void Function(Exception)? onError,
+    bool? renew,
+  }) : super(
+          RequestCache.cacheMinute,
+          onUpdate,
+          onError: onError ?? RequestCache.ignore,
+          renew: renew,
+        ) {
     start('nc-rooms');
   }
 

lib/api/marianumcloud/talk/talkApi.dart

@@ -34,11 +34,12 @@ abstract class TalkApi<T extends ApiResponse?> extends ApiRequest {
       getParameters?.update(key, (value) => value.toString());
     });
 
-    var endpoint = Uri.https('${AccountData().buildHttpAuthString()}@${EndpointData().nextcloud().domain}', '${EndpointData().nextcloud().path}/ocs/v2.php/apps/spreed/api/$path', getParameters);
+    var endpoint = Uri.https(EndpointData().nextcloud().domain, '${EndpointData().nextcloud().path}/ocs/v2.php/apps/spreed/api/$path', getParameters);
 
     headers ??= {};
     headers?.putIfAbsent('Accept', () => 'application/json');
     headers?.putIfAbsent('OCS-APIRequest', () => 'true');
+    headers?.putIfAbsent('Authorization', AccountData().getBasicAuthHeader);
 
     http.Response? data;