Fix DDC issues after hot reload

Author: simolus3

demos/supabase-todolist/lib/widgets/todo_list_page.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:powersync_flutter_demo/models/todo_item.dart';
+import 'package:powersync_flutter_demo/powersync.dart';
 
 import './status_app_bar.dart';
 import './todo_item_dialog.dart';
@@ -81,8 +82,9 @@ class TodoListWidgetState extends State<TodoListWidget> {
   Widget build(BuildContext context) {
     return StreamBuilder(
       stream: TodoList.watchSyncStatus().map((e) => e.hasSynced),
+      initialData: db.currentStatus.hasSynced,
       builder: (context, snapshot) {
-        if (snapshot.data ?? false) {
+        if (snapshot.data != true) {
           return const Text('Busy with sync');
         }
 

packages/powersync_core/lib/src/sync_status.dart

@@ -151,7 +151,9 @@ final class SyncStatus {
     return "SyncStatus<connected: $connected connecting: $connecting downloading: $downloading uploading: $uploading lastSyncedAt: $lastSyncedAt, hasSynced: $hasSynced, error: $anyError>";
   }
 
-  static const _statusEquality = ListEquality<SyncPriorityStatus>();
+  // This should be a ListEquality<SyncPriorityStatus>, but that appears to
+  // cause weird type errors with DDC (but only after hot reloads?!)
+  static const _statusEquality = ListEquality<Object?>();
 }
 
 /// The priority of a PowerSync bucket.

packages/powersync_core/lib/src/web/sync_worker_protocol.dart

@@ -203,7 +203,9 @@ extension type SerializedSyncStatus._(JSObject _) implements JSObject {
       hasSynced: hasSynced,
       uploadError: uploadError,
       downloadError: downloadError,
-      priorityStatusEntries: priorityStatusEntries?.toDart.map((e) {
+      priorityStatusEntries: <SyncPriorityStatus>[
+        if (priorityStatusEntries case final jsEntries?)
+          ...jsEntries.toDart.map((e) {
             final [rawPriority, rawSynced, rawHasSynced, ...] =
                 (e as JSArray).toDart;
             final syncedMillis = (rawSynced as JSNumber?)?.toDartInt;
@@ -215,8 +217,8 @@ extension type SerializedSyncStatus._(JSObject _) implements JSObject {
                   : null,
               hasSynced: (rawHasSynced as JSBoolean?)?.toDart,
             );
-          }).toList() ??
-          const [],
+          })
+      ],
     );
   }
 }