оптимизация: слегоньца набурмалдил

lib/backend/modules/chats.dart

@@ -512,12 +512,15 @@ class ChatsModule {
     if (accountId == null) return;
 
     final dialogRows = await AppDatabase.loadDialogChats(accountId);
-    final byParticipant = <int, List<Map<String, dynamic>>>{};
+    final byParticipant =
+        <int, List<({Map<String, dynamic> row, CachedChat cached})>>{};
     for (final row in dialogRows) {
       final cached = CachedChat.fromDbRow(row);
       for (final pid in cached.participants.keys) {
         if (pid == accountId) continue;
-        byParticipant.putIfAbsent(pid, () => []).add(row);
+        byParticipant
+            .putIfAbsent(pid, () => [])
+            .add((row: row, cached: cached));
       }
     }
 
@@ -529,8 +532,9 @@ class ChatsModule {
       final options = ContactCache.getOptions(contactId) ?? const <String>{};
       final affected = byParticipant[contactId];
       if (affected == null) continue;
-      for (final row in affected) {
-        final cached = CachedChat.fromDbRow(row);
+      for (final entry in affected) {
+        final row = entry.row;
+        final cached = entry.cached;
         final sameTitle = cached.title == name;
         final sameAvatar = (cached.iconUrl ?? '') == (avatar ?? '');
         final sameOptions = cached.options.length == options.length &&

lib/backend/modules/folders.dart

@@ -44,10 +44,13 @@ class FoldersModule {
     List<dynamic>? foldersOrder,
   ) {
     if (foldersOrder == null || foldersOrder.isEmpty) return;
-    final orderedIds = foldersOrder.map((id) => id.toString()).toList();
+    final orderIndex = <String, int>{};
+    for (var i = 0; i < foldersOrder.length; i++) {
+      orderIndex.putIfAbsent(foldersOrder[i].toString(), () => i);
+    }
     folders.sort((a, b) {
-      final aIndex = orderedIds.indexOf(a.id);
-      final bIndex = orderedIds.indexOf(b.id);
+      final aIndex = orderIndex[a.id] ?? -1;
+      final bIndex = orderIndex[b.id] ?? -1;
       if (aIndex == -1 && bIndex == -1) return 0;
       if (aIndex == -1) return 1;
       if (bIndex == -1) return -1;