diff --git a/lib/controllers/invites.dart b/lib/controllers/invites.dart
index 3effbf9..9c8a6e4 100644
--- a/lib/controllers/invites.dart
+++ b/lib/controllers/invites.dart
@@ -1,5 +1,6 @@
 import "package:collection/collection.dart";
 import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:flutter_riverpod/experimental/mutation.dart";
 import "package:flutter_riverpod/flutter_riverpod.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_state.dart";
@@ -115,6 +116,10 @@ class InvitesController extends Notifier<IList<RoomSummary>> {
   Future<void> declineAll() =>
       Future.wait(state.map((invite) => decline(invite.roomId)));
 
+  /// Accepting or declining an invite, keyed by its room ID
+  static final respondMutation = Mutation<void>();
+  static final declineAllMutation = Mutation<void>();
+
   static final provider =
       NotifierProvider<InvitesController, IList<RoomSummary>>(
         InvitesController.new,
diff --git a/lib/controllers/space_hierarchy.dart b/lib/controllers/space_hierarchy.dart
index 8a5aa9d..226b091 100644
--- a/lib/controllers/space_hierarchy.dart
+++ b/lib/controllers/space_hierarchy.dart
@@ -1,3 +1,4 @@
+import "package:flutter_riverpod/experimental/mutation.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/models/space_hierarchy.dart";
@@ -27,6 +28,12 @@ class SpaceHierarchyController(final String spaceId)
     );
   }
 
+  /// Adding rooms to a space, keyed by its ID
+  static final addChildrenMutation = Mutation<void>();
+
+  /// Removing a room from a space, keyed by (space ID, room ID)
+  static final removeChildMutation = Mutation<void>();
+
   static final provider = AsyncNotifierProvider.family
       .autoDispose<SpaceHierarchyController, SpaceHierarchy, String>(
         SpaceHierarchyController.new,
diff --git a/lib/helpers/extensions/log_out.dart b/lib/helpers/extensions/log_out.dart
index 166a2ef..a170857 100644
--- a/lib/helpers/extensions/log_out.dart
+++ b/lib/helpers/extensions/log_out.dart
@@ -8,7 +8,9 @@ import "package:nexus/controllers/unified_push.dart";
 import "package:nexus/main.dart";
 
 extension LogOut on MutationTarget {
-  Future<void> logOut(String accountId) async {
+  static final mutation = Mutation<void>();
+
+  Future<void> logOut(String accountId) => mutation.run(this, (_) async {
     final accounts = await container.read(AccountsController.provider.future);
     final account = accounts.firstWhereOrNull(
       (account) => account.id == accountId,
@@ -49,5 +51,5 @@ extension LogOut on MutationTarget {
     await container
         .read(ActiveAccountController.provider.notifier)
         .switchTo(other.id);
-  }
+  });
 }
diff --git a/lib/widgets/account_switcher.dart b/lib/widgets/account_switcher.dart
index 055b3cf..734a42b 100644
--- a/lib/widgets/account_switcher.dart
+++ b/lib/widgets/account_switcher.dart
@@ -43,9 +43,17 @@ class const AccountSwitcher({final bool onlyWithOthers = false, super.key})
         .switchTo(accountId)
         .onError(showError);
 
+    final loggingOut = ref.watch(LogOut.mutation).isPending;
+
     return AdaptiveMenuButton(
-      tooltip: "Switch account",
-      icon: active == null
+      tooltip: loggingOut ? "Logging out..." : "Switch account",
+      enabled: !loggingOut,
+      icon: loggingOut
+          ? const SizedBox.square(
+              dimension: 24,
+              child: CircularProgressIndicator(),
+            )
+          : active == null
           ? const Icon(Icons.account_circle)
           : avatarOf(active, 28),
       itemBuilder: (_) => [
diff --git a/lib/widgets/add_space_rooms_sheet.dart b/lib/widgets/add_space_rooms_sheet.dart
index 2f9aeb7..2f4ff8f 100644
--- a/lib/widgets/add_space_rooms_sheet.dart
+++ b/lib/widgets/add_space_rooms_sheet.dart
@@ -131,9 +131,12 @@ class const AddSpaceRoomsSheet(
               : () {
                   final container = ProviderScope.containerOf(context);
                   final roomIds = chosen.value;
-                  context.withProgressSnackbar(
-                    "Adding ${roomIds.length == 1 ? nameOf(roomIds.single) : "${roomIds.length} rooms"} to $spaceName...",
-                    () => save(container, roomIds),
+                  SpaceHierarchyController.addChildrenMutation(spaceId).run(
+                    container,
+                    (_) => context.withProgressSnackbar(
+                      "Adding ${roomIds.length == 1 ? nameOf(roomIds.single) : "${roomIds.length} rooms"} to $spaceName...",
+                      () => save(container, roomIds),
+                    ),
                   );
                   Navigator.of(context).pop();
                 },
diff --git a/lib/widgets/invites_list.dart b/lib/widgets/invites_list.dart
index f1be8f5..7713560 100644
--- a/lib/widgets/invites_list.dart
+++ b/lib/widgets/invites_list.dart
@@ -1,4 +1,3 @@
-import "package:flutter_hooks/flutter_hooks.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:material_ui/material_ui.dart";
 import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
@@ -12,9 +11,7 @@ import "package:nexus/models/room_summary.dart";
 import "package:nexus/widgets/avatar_or_hash.dart";
 import "package:nexus/widgets/room_summary_sheet.dart";
 
-class const InvitesList({super.key})
-    extends HookConsumerWidget
-    implements NavPage {
+class const InvitesList({super.key}) extends ConsumerWidget implements NavPage {
   @override
   String get title => "Invites";
 
@@ -32,7 +29,9 @@ class const InvitesList({super.key})
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final invites = ref.watch(InvitesController.provider);
-    final decliningAll = useState(false);
+    final decliningAll = ref
+        .watch(InvitesController.declineAllMutation)
+        .isPending;
 
     Future<void> declineAll() async {
       final confirmed = await context.showAdaptiveSheet<bool>(
@@ -57,12 +56,12 @@ class const InvitesList({super.key})
       );
       if (confirmed != true) return;
 
-      decliningAll.value = true;
-      await ref
-          .read(InvitesController.provider.notifier)
-          .declineAll()
+      await InvitesController.declineAllMutation
+          .run(
+            ref,
+            (_) => ref.read(InvitesController.provider.notifier).declineAll(),
+          )
           .onError(showError);
-      if (context.mounted) decliningAll.value = false;
     }
 
     return Scaffold(
@@ -70,8 +69,8 @@ class const InvitesList({super.key})
       floatingActionButton: invites.isEmpty
           ? null
           : FloatingActionButton.extended(
-              onPressed: decliningAll.value ? null : declineAll,
-              icon: decliningAll.value
+              onPressed: decliningAll ? null : declineAll,
+              icon: decliningAll
                   ? const SizedBox.square(
                       dimension: 24,
                       child: CircularProgressIndicator(),
@@ -96,9 +95,12 @@ class const InvitesList({super.key})
 }
 
 class const InviteCard(final RoomSummary invite, {super.key})
-    extends StatelessWidget {
+    extends ConsumerWidget {
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final responding = ref
+        .watch(InvitesController.respondMutation(invite.roomId))
+        .isPending;
     final name = invite.name ?? invite.canonicalAlias ?? invite.roomId;
     final inviterName =
         invite.inviterProfile?.displayName ?? invite.invitedBy?.localpart;
@@ -106,7 +108,15 @@ class const InviteCard(final RoomSummary invite, {super.key})
     return Card(
       clipBehavior: .antiAlias,
       child: ListTile(
-        onTap: () => context.showAdaptiveSheet((_) => RoomSummarySheet(invite)),
+        onTap: responding
+            ? null
+            : () => context.showAdaptiveSheet((_) => RoomSummarySheet(invite)),
+        trailing: responding
+            ? const SizedBox.square(
+                dimension: 24,
+                child: CircularProgressIndicator(),
+              )
+            : null,
         leading: AvatarOrHash(
           invite.avatarUrl,
           name,
diff --git a/lib/widgets/room_summary_sheet.dart b/lib/widgets/room_summary_sheet.dart
index f1700da..1118cb9 100644
--- a/lib/widgets/room_summary_sheet.dart
+++ b/lib/widgets/room_summary_sheet.dart
@@ -65,9 +65,13 @@ class const RoomSummarySheet(
               final container = ProviderScope.containerOf(context);
               Navigator.of(context).pop();
 
-              container
-                  .read(InvitesController.provider.notifier)
-                  .decline(summary.roomId)
+              InvitesController.respondMutation(summary.roomId)
+                  .run(
+                    container,
+                    (_) => container
+                        .read(InvitesController.provider.notifier)
+                        .decline(summary.roomId),
+                  )
                   .onError(showError);
             },
             style: TextButton.styleFrom(foregroundColor: colorScheme.error),
@@ -77,18 +81,19 @@ class const RoomSummarySheet(
             onPressed: () {
               final container = ProviderScope.containerOf(context);
 
-              context
-                  .joinRoom(
-                    .new(roomIdOrAlias: summary.roomId, fromInvite: true),
-                    name: name,
-                  )
-                  .then((roomId) {
+              InvitesController.respondMutation(summary.roomId)
+                  .run(container, (_) async {
+                    final roomId = await context.joinRoom(
+                      .new(roomIdOrAlias: summary.roomId, fromInvite: true),
+                      name: name,
+                    );
                     if (roomId != null) {
                       container
                           .read(InvitesController.provider.notifier)
                           .remove(summary.roomId);
                     }
-                  });
+                  })
+                  .onError(showError);
               Navigator.of(context).pop();
             },
             child: Text("Accept"),
diff --git a/lib/widgets/space_hierarchy_sheet.dart b/lib/widgets/space_hierarchy_sheet.dart
index e41d780..f5147e0 100644
--- a/lib/widgets/space_hierarchy_sheet.dart
+++ b/lib/widgets/space_hierarchy_sheet.dart
@@ -74,53 +74,74 @@ class const SpaceHierarchySheet(final String spaceId, {super.key})
       String roomId, {
       required String name,
       required String spaceName,
-    }) => IconButton(
-      tooltip: "Remove from space",
-      icon: const Icon(Icons.remove_circle_outline),
-      onPressed: () => context.showAdaptiveSheet(
-        (context) => SheetLayout(
-          title: const Text("Remove Room"),
-          actions: [
-            TextButton(
-              onPressed: Navigator.of(context).pop,
-              child: const Text("Cancel"),
+    }) => Consumer(
+      builder: (context, ref, _) {
+        final mutation = SpaceHierarchyController.removeChildMutation((
+          spaceId,
+          roomId,
+        ));
+        if (ref.watch(mutation).isPending) {
+          return const Padding(
+            padding: .all(12),
+            child: SizedBox.square(
+              dimension: 24,
+              child: CircularProgressIndicator(),
             ),
-            TextButton(
-              onPressed: () {
-                final container = ProviderScope.containerOf(context);
-                context.withProgressSnackbar(
-                  "Removing $name from $spaceName...",
-                  () async {
-                    await container
-                        .read(ClientController.provider.notifier)
-                        .setState(
-                          .new(
-                            roomId: spaceId,
-                            type: EventType.spaceChild.type,
-                            stateKey: roomId,
-                            content: const Content(),
-                          ),
-                        );
-                    container.invalidate(
-                      SpaceHierarchyController.provider(spaceId),
+          );
+        }
+
+        return IconButton(
+          tooltip: "Remove from space",
+          icon: const Icon(Icons.remove_circle_outline),
+          onPressed: () => context.showAdaptiveSheet(
+            (context) => SheetLayout(
+              title: const Text("Remove Room"),
+              actions: [
+                TextButton(
+                  onPressed: Navigator.of(context).pop,
+                  child: const Text("Cancel"),
+                ),
+                TextButton(
+                  onPressed: () {
+                    final container = ProviderScope.containerOf(context);
+                    mutation.run(
+                      container,
+                      (_) => context.withProgressSnackbar(
+                        "Removing $name from $spaceName...",
+                        () async {
+                          await container
+                              .read(ClientController.provider.notifier)
+                              .setState(
+                                .new(
+                                  roomId: spaceId,
+                                  type: EventType.spaceChild.type,
+                                  stateKey: roomId,
+                                  content: const Content(),
+                                ),
+                              );
+                          container.invalidate(
+                            SpaceHierarchyController.provider(spaceId),
+                          );
+                        },
+                      ),
                     );
+                    Navigator.of(context).pop();
                   },
-                );
-                Navigator.of(context).pop();
-              },
-              style: TextButton.styleFrom(
-                foregroundColor: Theme.of(context).colorScheme.error,
-              ),
-              child: const Text("Remove"),
+                  style: TextButton.styleFrom(
+                    foregroundColor: Theme.of(context).colorScheme.error,
+                  ),
+                  child: const Text("Remove"),
+                ),
+              ],
+              children: [
+                Text(
+                  "Are you sure you want to remove \"$name\" from \"$spaceName\"? Its members will stay in it.",
+                ),
+              ],
             ),
-          ],
-          children: [
-            Text(
-              "Are you sure you want to remove \"$name\" from \"$spaceName\"? Its members will stay in it.",
-            ),
-          ],
-        ),
-      ),
+          ),
+        );
+      },
     );
 
     Widget level(
@@ -130,6 +151,9 @@ class const SpaceHierarchySheet(final String spaceId, {super.key})
     ) => HookConsumer(
       builder: (context, ref, _) {
         final loadingMore = useState(false);
+        final adding = ref
+            .watch(SpaceHierarchyController.addChildrenMutation(spaceId))
+            .isPending;
         final canManage = ref.watch(
           PowerLevelController.provider(
             .state(eventType: .spaceChild, roomId: spaceId),
@@ -317,16 +341,24 @@ class const SpaceHierarchySheet(final String spaceId, {super.key})
                     ),
                   if (canManage)
                     TextButton.icon(
-                      onPressed: () => context.showAdaptiveSheet(
-                        (_) => AddSpaceRoomsSheet(
-                          spaceId,
-                          spaceName: spaceName,
-                          existing: (byId[spaceId]?.children ?? const .empty())
-                              .map((child) => child.roomId)
-                              .toISet(),
-                        ),
-                      ),
-                      icon: const Icon(Icons.add),
+                      onPressed: adding
+                          ? null
+                          : () => context.showAdaptiveSheet(
+                              (_) => AddSpaceRoomsSheet(
+                                spaceId,
+                                spaceName: spaceName,
+                                existing:
+                                    (byId[spaceId]?.children ?? const .empty())
+                                        .map((child) => child.roomId)
+                                        .toISet(),
+                              ),
+                            ),
+                      icon: adding
+                          ? const SizedBox.square(
+                              dimension: 18,
+                              child: CircularProgressIndicator(),
+                            )
+                          : const Icon(Icons.add),
                       label: const Text("Add rooms"),
                     ),
                 ],