Add accent colour picker, fix empty user card when accepting friend request, add button to transfer allocations

lib/services/data_service/data_service_friendships.dart

@@ -151,6 +151,8 @@ extension DataServiceFriendships on DataService {
       overrideAddressee: targetUser,
     );
     _pendingOutgoing = [friendship, ..._pendingOutgoing];
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -159,6 +161,8 @@ extension DataServiceFriendships on DataService {
     final json = await api.post('/friendships/$friendshipId/accept', {});
     final friendship = _parseAndUpsertFriendship(json, fallbackStatus: 'accepted');
     _pendingIncoming = _pendingIncoming.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -177,6 +181,8 @@ extension DataServiceFriendships on DataService {
         _parseAndRemoveFriendship(json, friendshipId, status: 'none');
     _pendingOutgoing =
         _pendingOutgoing.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
     return friendship;
   }
@@ -193,6 +199,8 @@ extension DataServiceFriendships on DataService {
         _pendingIncoming.where((f) => f.id != friendshipId).toList();
     _pendingOutgoing =
         _pendingOutgoing.where((f) => f.id != friendshipId).toList();
+    await fetchFriendships();
+    await fetchPendingFriendships();
     _notifyAsync();
   }