chore: topic is completed if user has finished number of activities equal to number of 2 person activities in topic (#3983)

lib/pangea/course_plans/course_plan_room_extension.dart

@@ -104,11 +104,12 @@ extension CoursePlanRoomExtension on Room {
       throw Exception('Topic not found');
     }
 
-    final activityIds = course.loadedTopics[topicIndex].loadedActivities
+    final numTwoPersonActivities = course
+        .loadedTopics[topicIndex].loadedActivities
         .where((a) => a.req.numberOfParticipants <= 2)
-        .map((a) => a.activityId)
-        .toList();
-    return state.completedActivities.toSet().containsAll(activityIds);
+        .length;
+
+    return state.completedActivities.length >= numTwoPersonActivities;
   }
 
   CourseTopicModel? currentTopic(

lib/pangea/course_plans/course_user_event.dart

@@ -30,9 +30,9 @@ class CourseUserState {
 
   Map<String, List<String>> get joinedActivities => _joinedActivities;
 
-  List<String> get completedActivities => _completedActivities.keys.toList();
-  List<String> get joinedActivityRooms =>
-      _joinedActivities.values.expand((e) => e).toList();
+  Set<String> get completedActivities => _completedActivities.keys.toSet();
+  Set<String> get joinedActivityRooms =>
+      _joinedActivities.values.expand((e) => e).toSet();
 
   bool hasCompletedActivity(
     String activityID,