implemented avatar management for user profiles and chat rooms, including 1:1 cropping, integrated OCS and Spreed avatar APIs, added cache invalidation logic, and updated the account settings view to display user info and profile pictures.

lib/api/marianumcloud/talk/actions/talk_actions.dart

@@ -1,3 +1,5 @@
+import 'dart:typed_data';
+
 import 'package:http/http.dart' as http;
 
 import '../../../api_params.dart';
@@ -62,3 +64,44 @@ class DeleteMessage extends TalkApi {
     Map<String, String>? headers,
   ) => http.delete(uri, headers: headers);
 }
+
+class SetRoomAvatar extends TalkApi {
+  final String chatToken;
+  final Uint8List bytes;
+  final String filename;
+
+  SetRoomAvatar(this.chatToken, this.bytes, {this.filename = 'avatar.jpg'})
+    : super('v1/room/$chatToken/avatar', null);
+
+  @override
+  ApiResponse? assemble(String raw) => null;
+
+  @override
+  Future<http.Response> request(
+    Uri uri,
+    ApiParams? body,
+    Map<String, String>? headers,
+  ) async {
+    final req = http.MultipartRequest('POST', uri)
+      ..headers.addAll(headers ?? const {})
+      ..files.add(http.MultipartFile.fromBytes('file', bytes, filename: filename));
+    final streamed = await req.send();
+    return http.Response.fromStream(streamed);
+  }
+}
+
+class DeleteRoomAvatar extends TalkApi {
+  final String chatToken;
+
+  DeleteRoomAvatar(this.chatToken) : super('v1/room/$chatToken/avatar', null);
+
+  @override
+  ApiResponse? assemble(String raw) => null;
+
+  @override
+  Future<http.Response> request(
+    Uri uri,
+    ApiParams? body,
+    Map<String, String>? headers,
+  ) => http.delete(uri, headers: headers);
+}