[mob] Make sure cluster page is updated after file removal

mobile/lib/events/files_updated_event.dart

@@ -27,4 +27,5 @@ enum EventType {
   unhide,
   coverChanged,
   peopleChanged,
+  peopleClusterChanged,
 }

mobile/lib/services/machine_learning/face_ml/feedback/cluster_feedback.dart

@@ -5,6 +5,8 @@ import "package:flutter/foundation.dart";
 import "package:logging/logging.dart";
 import "package:photos/core/event_bus.dart";
 import "package:photos/db/files_db.dart";
+import "package:photos/events/files_updated_event.dart";
+import "package:photos/events/local_photos_updated_event.dart";
 import "package:photos/events/people_changed_event.dart";
 import "package:photos/extensions/stop_watch.dart";
 import "package:photos/face/db.dart";
@@ -13,8 +15,6 @@ import "package:photos/generated/protos/ente/common/vector.pb.dart";
 import "package:photos/models/file/file.dart";
 import 'package:photos/services/machine_learning/face_ml/face_clustering/cosine_distance.dart';
 import "package:photos/services/machine_learning/face_ml/face_clustering/face_clustering_service.dart";
-// import "package:photos/services/machine_learning/face_ml/face_clustering/face_info_for_clustering.dart";
-// import "package:photos/services/machine_learning/face_ml/face_filtering/face_filtering_constants.dart";
 import "package:photos/services/machine_learning/face_ml/face_ml_result.dart";
 import "package:photos/services/machine_learning/face_ml/person/person_service.dart";
 import "package:photos/services/search_service.dart";
@@ -196,6 +196,13 @@ class ClusterFeedbackService {
       await FaceMLDataDB.instance.forceUpdateClusterIds(newFaceIdToClusterID);
 
       Bus.instance.fire(PeopleChangedEvent());
+      Bus.instance.fire(
+        LocalPhotosUpdatedEvent(
+          files,
+          type: EventType.peopleClusterChanged,
+          source: "$clusterID",
+        ),
+      );
       return;
     } catch (e, s) {
       _logger.severe("Error in removeFilesFromCluster", e, s);

mobile/lib/ui/viewer/people/cluster_page.dart

@@ -69,6 +69,13 @@ class _ClusterPageState extends State<ClusterPage> {
         }
         setState(() {});
       }
+      if (event.type == EventType.peopleClusterChanged &&
+          (event.source == widget.clusterID.toString())) {
+        for (var updatedFile in event.updatedFiles) {
+          files.remove(updatedFile);
+        }
+        setState(() {});
+      }
     });
     kDebugMode
         ? ClusterFeedbackService.instance.debugLogClusterBlurValues(
@@ -107,6 +114,7 @@ class _ClusterPageState extends State<ClusterPage> {
         EventType.deletedFromRemote,
         EventType.deletedFromEverywhere,
         EventType.hide,
+        EventType.peopleClusterChanged,
       },
       tagPrefix: widget.tagPrefix + widget.tagPrefix,
       selectedFiles: _selectedFiles,
@@ -118,9 +126,10 @@ class _ClusterPageState extends State<ClusterPage> {
         preferredSize: const Size.fromHeight(50.0),
         child: ClusterAppBar(
           SearchResultPage.appBarType,
-          "${widget.searchResult.length} memories${widget.appendTitle}",
+          "${files.length} memories${widget.appendTitle}",
           _selectedFiles,
           widget.clusterID,
+          key: ValueKey(files.length),
         ),
       ),
       body: Column(