Some refactoring

Wallet.Avalonia/AllNavigationView.axaml

@@ -24,7 +24,7 @@
                         <ComparisonCondition LeftOperand="{Binding Activated}" RightOperand="True" />
                     </ConditionalExpression>
                 </ConditionAction.Condition>
-                <NavigateAction Region="Left" Route="ContentItemCollection">
+                <NavigateAction Region="Left" Route="ItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
                     <Parameter Key="NavigationStackEnabled" Value="{x:True}" />

Wallet.Avalonia/App.axaml.cs

@@ -120,12 +120,12 @@ public partial class App : Application
 
                         services.AddTemplate<OpenWalletViewModel, OpenWalletView>("OpenWallet");
 
-                        services.AddScoped<WalletViewModelConfiguration>();
+                        services.AddScoped<ItemCollectionConfiguration>();
 
                         services.AddTemplate<WalletViewModel, WalletView>("Wallet");
-                        services.AddTemplate<ItemCollectionViewModel, ItemCollectionView>("ContentItemCollection");
+                        services.AddTemplate<ItemCollectionViewModel, ItemCollectionView>("ItemCollection");
 
-                        services.AddHandler<SynchronizeItemViewModelHandler>();
+                        services.AddHandler<SynchronizeItemCollectionViewModelHandler>();
 
                         services.AddTemplate<WalletHeaderViewModel, WalletHeaderView>("WalletHeader");
                         services.AddTemplate<BackActionViewModel, BackActionView>();
@@ -146,9 +146,12 @@ public partial class App : Application
                         services.AddTemplate<ItemNavigationViewModel, ItemNavigationView>();
                         services.AddTemplate<EmptyItemCollectionViewModel, EmptyItemCollectionView>("EmptyItemCollection");
 
+                        services.AddScoped<IDecoratorService<ItemHeaderConfiguration>, DecoratorService<ItemHeaderConfiguration>>();
                         services.AddScoped<IDecoratorService<ItemConfiguration>, DecoratorService<ItemConfiguration>>();
 
                         services.AddTemplate<ItemViewModel, ItemView>("Item");
+                        services.AddHandler<CreateItemViewModelHandler>("Item");
+
                         services.AddTemplate<ItemHeaderViewModel, ItemHeaderView>();
                         services.AddTemplate<ItemContentViewModel, ItemContentView>();
 

Wallet.Avalonia/ArchiveNavigationView.axaml

@@ -24,7 +24,7 @@
                         <ComparisonCondition LeftOperand="{Binding Activated}" RightOperand="True" />
                     </ConditionalExpression>
                 </ConditionAction.Condition>
-                <NavigateAction Region="Left" Route="ContentItemCollection">
+                <NavigateAction Region="Left" Route="ItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
                     <Parameter Key="NavigationStackEnabled" Value="{x:True}" />

Wallet.Avalonia/CategoriesNavigationView.axaml

@@ -5,4 +5,5 @@
     xmlns:vm="using:Wallet"
     x:DataType="vm:CategoriesNavigationViewModel"
     Content="Categories"
-    MenuItemsSource="{Binding}" />
+    MenuItemsSource="{Binding}"
+    SelectsOnInvoked="False" />

Wallet.Avalonia/CategoryNavigationView.axaml

@@ -4,4 +4,32 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:vm="using:Wallet"
     x:DataType="vm:CategoryNavigationViewModel"
-    Content="{Binding Filter}" />
+    Content="{Binding Filter}"
+    IsSelected="{Binding Selected}">
+    <Interaction.Behaviors>
+        <DataTriggerBehavior Binding="{Binding Selected}" Value="True">
+            <ConditionAction>
+                <ConditionAction.Condition>
+                    <ConditionalExpression ForwardChaining="And">
+                        <ComparisonCondition LeftOperand="{Binding Activated}" RightOperand="False" />
+                    </ConditionalExpression>
+                </ConditionAction.Condition>
+                <NavigateAction Region="Main" Route="Wallet">
+                    <Parameter Key="Filter" Value="{Binding Filter}" />
+                </NavigateAction>
+            </ConditionAction>
+            <ConditionAction>
+                <ConditionAction.Condition>
+                    <ConditionalExpression ForwardChaining="And">
+                        <ComparisonCondition LeftOperand="{Binding Activated}" RightOperand="True" />
+                    </ConditionalExpression>
+                </ConditionAction.Condition>
+                <NavigateAction Region="Left" Route="ItemCollection">
+                    <Parameter Key="Filter" Value="{Binding Filter}" />
+                    <Parameter Key="Transition" Value="FromRight" />
+                    <Parameter Key="NavigationStackEnabled" Value="{x:True}" />
+                </NavigateAction>
+            </ConditionAction>
+        </DataTriggerBehavior>
+    </Interaction.Behaviors>
+</NavigationViewItem>

Wallet.Avalonia/ItemNavigationView.axaml

@@ -14,11 +14,11 @@
                 Region="{Binding Named, StringFormat='{}{0}:Content'}"
                 Route="Item"
                 Scope="self">
-                <Parameter Key="FromCategory" Value="{x:False}" />
-                <Parameter Key="State" Value="{x:Static vm:ItemState.Read}" />
                 <Parameter Key="Name" Value="{Binding Name}" />
+                <Parameter Key="FromCategory" Value="{x:False}" />
                 <Parameter Key="Favourite" Value="{Binding Favourite}" />
                 <Parameter Key="Archived" Value="{Binding Archived}" />
+                <Parameter Key="State" Value="{x:Static vm:ItemState.Read}" />
                 <Parameter Key="NavigationStackEnabled" Value="{x:False}" />
             </NavigateAction>
         </AttachedEventTriggerBehaviour>

Wallet.Avalonia/StarredNavigationView.axaml

@@ -24,7 +24,7 @@
                         <ComparisonCondition LeftOperand="{Binding Activated}" RightOperand="True" />
                     </ConditionalExpression>
                 </ConditionAction.Condition>
-                <NavigateAction Region="Left" Route="ContentItemCollection">
+                <NavigateAction Region="Left" Route="ItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
                     <Parameter Key="NavigationStackEnabled" Value="{x:True}" />

Wallet.Avalonia/WalletView.axaml

@@ -26,7 +26,7 @@
             <Interaction.Behaviors>
                 <AttachedBehaviour>
                     <NavigateRegionAction Name="Left">
-                        <NavigateAction Region="Left" Route="ContentItemCollection">
+                        <NavigateAction Region="Left" Route="ItemCollection">
                             <Parameter Key="Filter" Value="{Binding Filter}" />
                         </NavigateAction>
                     </NavigateRegionAction>

Wallet/ConfirmCreateItemHandler.cs

@@ -4,21 +4,24 @@ namespace Wallet;
 
 public class ConfirmCreateItemHandler(IMediator mediator,
     IDecoratorService<ItemConfiguration> itemConfigurationDecorator,
+    IDecoratorService<ItemHeaderConfiguration> itemHeaderConfiguration,
     IPublisher publisher) :
     INotificationHandler<ConfirmEventArgs<Item>>
 {
     public async Task Handle(ConfirmEventArgs<Item> args)
     {
-        if (itemConfigurationDecorator.Service is ItemConfiguration configuration)
+        if (itemHeaderConfiguration.Service is ItemHeaderConfiguration headerConfiguration &&
+            itemConfigurationDecorator.Service is ItemConfiguration itemConfiguration)
         {
-            string? name = await mediator.Handle<ConfirmEventArgs<ItemHeader>, string>(Confirm.As<ItemHeader>());
+            string? name = headerConfiguration?.Name;
             if (name is not null)
             {
                 Guid id = Guid.NewGuid();
                 publisher.Publish(Created.As(new Item<(Guid, string)>((id, name))));
 
                 await mediator.Handle<CreateEventArgs<(Guid, string, string,
-                    ItemConfiguration)>, bool>(new CreateEventArgs<(Guid, string, string, ItemConfiguration)>((id, name, "", configuration)));
+                    ItemConfiguration)>, bool>(new CreateEventArgs<(Guid, string, string, 
+                    ItemConfiguration)>((id, name, "", itemConfiguration)));
             }
         }
     }

Wallet/ConfirmUpdateItemHandler.cs

@@ -4,18 +4,18 @@ namespace Wallet;
 
 public class ConfirmUpdateItemHandler(IDecoratorService<Item<(Guid, string)>> itemDecorator,
     IDecoratorService<ItemConfiguration> itemConfigurationDecorator,
+    IDecoratorService<ItemHeaderConfiguration> itemHeaderConfiguration,
     IMediator mediator,
     IPublisher publisher) :
     INotificationHandler<ConfirmEventArgs<Item>>
 {
     public async Task Handle(ConfirmEventArgs<Item> args)
     {
-        if (itemDecorator?.Service is Item<(Guid, string)> item && 
-            itemConfigurationDecorator.Service is ItemConfiguration configuration)
+        if (itemDecorator?.Service is Item<(Guid, string)> item &&
+            itemHeaderConfiguration.Service is ItemHeaderConfiguration headerConfiguration &&
+            itemConfigurationDecorator.Service is ItemConfiguration itemConfiguration)
         {
-            string? name = await mediator.Handle<ConfirmEventArgs<ItemHeader>,
-                string>(Confirm.As<ItemHeader>());
-
+            string? name = headerConfiguration?.Name;
             if (name is not null)
             {
                 publisher.Publish(Notify.As(new ItemHeader<string>(name)));
@@ -28,7 +28,7 @@ public class ConfirmUpdateItemHandler(IDecoratorService<Item<(Guid, string)>> it
                 itemDecorator.Set(newItem);
 
                 await mediator.Handle<UpdateEventArgs<Item<(Guid, string, ItemConfiguration)>>, bool>(new UpdateEventArgs<Item<(Guid, string,
-                    ItemConfiguration)>>(new Item<(Guid, string, ItemConfiguration)>((id, name, configuration))));
+                    ItemConfiguration)>>(new Item<(Guid, string, ItemConfiguration)>((id, name, itemConfiguration))));
             }
         }
     }

Wallet/CreateItemHandler.cs

@@ -13,7 +13,7 @@ public class CreateItemHandler(IDbContextFactory<WalletContext> dbContextFactory
     public async Task<bool> Handle(CreateEventArgs<(Guid, string, string, ItemConfiguration)> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is (Guid id, string name, string category, ItemConfiguration configuration))
+        if (args.Sender is (Guid id, string name, string category, ItemConfiguration configuration))
         {
             try
             {

Wallet/CreateItemViewModelHandler.cs

@@ -0,0 +1,43 @@
+using System.Xml.Linq;
+using Toolkit.Foundation;
+
+namespace Wallet;
+
+public class CreateItemViewModelHandler(IServiceFactory serviceFactory,
+    IDecoratorService<ItemHeaderConfiguration> itemHeaderConfigurationDecorator) : 
+    IHandler<CreateEventArgs<ItemViewModel>, ItemViewModel?>
+{
+    public Task<ItemViewModel?> Handle(CreateEventArgs<ItemViewModel> args,
+        CancellationToken cancellationToken)
+    {
+        string? name = "";
+        ItemState? state = null;
+
+        if (args.Parameters is { Length: 5 })
+        {
+            (name, bool _, bool _, bool _, state) = args.Parameters.CreateValueTuple<string, bool, bool, bool, ItemState>();
+        }
+
+        if (args.Parameters is { Length: 2 })
+        {
+            (bool _, state) = args.Parameters.CreateValueTuple<bool, ItemState>();
+        }
+
+        ItemHeaderConfiguration configuration = new()
+        {
+            Name = name
+        };
+
+        itemHeaderConfigurationDecorator.Set(configuration);
+
+        if (serviceFactory.Create<ItemViewModel>(args.Parameters) is ItemViewModel itemViewModel)
+        {
+            itemViewModel.Add<ItemHeaderViewModel>(configuration, state, "", name);
+            itemViewModel.Add<ItemContentViewModel>();
+
+            return Task.FromResult<ItemViewModel?>(itemViewModel);
+        }    
+
+        return Task.FromResult(default(ItemViewModel));
+    }
+}

Wallet/CreateWalletHandler.cs

@@ -12,7 +12,7 @@ public class CreateWalletHandler(IWalletFactory componentFactory,
     public async Task<bool> Handle(CreateEventArgs<Wallet<(string, string)>> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is Wallet <(string, string)> Wallet)
+        if (args.Sender is Wallet <(string, string)> Wallet)
         {
             if (Wallet.Value is (string name, string password) && 
                 name is { Length: > 0 } &&

Wallet/DateEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class DateEntryViewModelHandler(IServiceFactory serviceFactory) :
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<DateEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is DateEntryConfiguration configuration)
+        if (args.Sender is DateEntryConfiguration configuration)
         {
             string? label = configuration.Label;
 

Wallet/DropdownEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class DropdownEntryViewModelHandler(IServiceFactory serviceFactory) :
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<DropdownEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is DropdownEntryConfiguration configuration)
+        if (args.Sender is DropdownEntryConfiguration configuration)
         {
             List<DropdownValueViewModel> values = [];
             foreach (string item in configuration.Values)

Wallet/FilterNavigationViewModel.cs

@@ -1,5 +1,4 @@
 using CommunityToolkit.Mvvm.ComponentModel;
-using CommunityToolkit.Mvvm.Input;
 using Toolkit.Foundation;
 
 namespace Wallet;
@@ -35,10 +34,6 @@ public partial class FilterNavigationViewModel :
 
     public Task Handle(ActivatedEventArgs<Wallet> args) =>
         Task.FromResult(Activated = true);
-
-    [RelayCommand]
-    public void Invoke() => Publisher.Publish(Notify.As(new Filter(Filter)),
-        nameof(ItemCollectionViewModel));
 }
 
 public partial class FilterNavigationViewModel<TWalletNavigation> :
@@ -46,7 +41,8 @@ public partial class FilterNavigationViewModel<TWalletNavigation> :
     IWalletNavigationViewModel,
     INotificationHandler<ActivatedEventArgs<Wallet>>,
     INotificationHandler<DeactivatedEventArgs<Wallet>>
-    where TWalletNavigation : IWalletNavigationViewModel
+    where TWalletNavigation :
+    IWalletNavigationViewModel
 {
     [ObservableProperty]
     private bool activated;
@@ -73,8 +69,4 @@ public partial class FilterNavigationViewModel<TWalletNavigation> :
 
     public Task Handle(ActivatedEventArgs<Wallet> args) =>
         Task.FromResult(Activated = true);
-
-    [RelayCommand]
-    public void Invoke() => Publisher.Publish(Notify.As(new Filter(Filter)),
-        nameof(ItemCollectionViewModel));
 }

Wallet/IItemViewModel.cs

@@ -0,0 +1,7 @@
+namespace Wallet;
+
+public interface IItemViewModel : 
+    IDisposable
+{
+
+}

Wallet/ItemCollectionConfiguration.cs

@@ -1,6 +1,6 @@
 namespace Wallet;
 
-public record WalletViewModelConfiguration
+public record ItemCollectionConfiguration
 {
     public string? Filter { get; set; } = "All";
 

Wallet/ItemCollectionViewModel.cs

@@ -16,7 +16,7 @@ public partial class ItemCollectionViewModel :
     [ObservableProperty]
     public string? named;
 
-    private WalletViewModelConfiguration configuration;
+    private ItemCollectionConfiguration configuration;
 
     public ItemCollectionViewModel(IServiceProvider provider,
         IServiceFactory factory,
@@ -26,7 +26,7 @@ public partial class ItemCollectionViewModel :
         IDisposer disposer,
         IContentTemplate template,
         NamedComponent named,
-        WalletViewModelConfiguration configuration,
+        ItemCollectionConfiguration configuration,
         string? filter = null) : base(provider, factory, mediator, publisher, subscriber, disposer)
     {
         Template = template;
@@ -39,7 +39,7 @@ public partial class ItemCollectionViewModel :
 
     public Task Handle(NotifyEventArgs<Filter> args)
     {
-        if (args.Value is Filter filter)
+        if (args.Sender is Filter filter)
         {
             configuration = configuration with { Filter = filter.Value };
             Fetch(true);
@@ -50,7 +50,7 @@ public partial class ItemCollectionViewModel :
 
     public Task Handle(NotifyEventArgs<Search<string>> args)
     {
-        if (args.Value is Search<string> search)
+        if (args.Sender is Search<string> search)
         {
             configuration = configuration with { Query = search.Value };
             Fetch(true);
@@ -71,5 +71,5 @@ public partial class ItemCollectionViewModel :
     }
 
     protected override SynchronizeExpression BuildAggregateExpression() =>
-        new(Synchronize.As<ItemNavigationViewModel, WalletViewModelConfiguration>(configuration));
+        new(Synchronize.As<ItemNavigationViewModel, ItemCollectionConfiguration>(configuration));
 }

Wallet/ItemCommandHeaderViewModel.cs

@@ -16,16 +16,17 @@ public partial class ItemCommandHeaderViewModel(IServiceProvider provider,
 
     public Task Handle(NotifyEventArgs<ItemCommandHeaderCollection> args)
     {
-        Clear();
-
-        if (args.Value is ItemCommandHeaderCollection commandCollection)
+        if (args.Sender is ItemCommandHeaderCollection commandCollection)
         {
-            foreach (IDisposable command in commandCollection)
+            Clear(args =>
             {
-                Add(command);
-            }
+                foreach (IDisposable command in commandCollection)
+                {
+                    args.Add(command);
+                }
+            });
         }
-
+     
         return Task.CompletedTask;
     }
 }

Wallet/ItemContentViewModel.cs

@@ -11,18 +11,18 @@ public partial class ItemContentViewModel(IServiceProvider provider,
     IContentTemplate template) :
     ObservableCollection<ItemSectionViewModel>(provider, factory, mediator, publisher, subscriber, disposer),
     IItemEntryViewModel,
-    INotificationHandler<NotifyEventArgs<ItemCategory<string>>>
+    INotificationHandler<NotifyEventArgs<ItemCategory<string>>>,
+    IItemViewModel
 {
     public IContentTemplate Template { get; set; } = template;
 
     public Task Handle(NotifyEventArgs<ItemCategory<string>> args)
     {
-        if (args.Value is ItemCategory<string> category)
+        if (args.Sender is ItemCategory<string> category 
+            && category.Value is string value)
         {
-            if (category.Value is string value)
-            {
-                Fetch(() => new SynchronizeExpression(new SynchronizeEventArgs<IItemEntryViewModel, string>(value)), true);
-            }
+            Fetch(() => new SynchronizeExpression(new SynchronizeEventArgs<IItemEntryViewModel,
+                string>(value)), true);
         }
 
         return Task.CompletedTask;

Wallet/ItemCreatedHandler.cs

@@ -10,7 +10,7 @@ public class ItemCreatedHandler(IServiceProvider serviceProvider,
 {
     public Task Handle(CreatedEventArgs<Item<(Guid, string)>> args)
     {
-        if (args.Value is Item<(Guid, string)> item)
+        if (args.Sender is Item<(Guid, string)> item)
         {
             (Guid id, string name) = item.Value;
 

Wallet/ItemHeader.cs

@@ -2,4 +2,4 @@
 
 public record ItemHeader<TValue>(TValue Value);
 
-public record ItemHeader;
+public record ItemHeader;

Wallet/ItemHeaderConfiguration.cs

@@ -0,0 +1,6 @@
+namespace Wallet;
+
+public class ItemHeaderConfiguration
+{
+    public string? Name { get; set; }
+}

Wallet/ItemHeaderViewModel.cs

@@ -8,10 +8,11 @@ public partial class ItemHeaderViewModel :
     INotificationHandler<UpdateEventArgs<Item>>,
     INotificationHandler<ConfirmEventArgs<Item>>,
     INotificationHandler<CancelEventArgs<Item>>,
-    IHandler<ValidationEventArgs<ItemHeader>, bool>,
-    IHandler<ConfirmEventArgs<ItemHeader>, string?>,
-    INotificationHandler<NotifyEventArgs<ItemCategory<string>>>
+    INotificationHandler<NotifyEventArgs<ItemCategory<string>>>,
+    IItemViewModel
 {
+    private readonly ItemHeaderConfiguration configuration;
+
     [ObservableProperty]
     private string? category;
 
@@ -24,22 +25,19 @@ public partial class ItemHeaderViewModel :
         IPublisher publisher,
         ISubscription subscriber,
         IDisposer disposer,
+        ItemHeaderConfiguration configuration,
         ItemState state,
         string key,
         string value) : base(provider, factory, mediator, publisher, subscriber, disposer, key, value)
     {
+        this.configuration = configuration;
+
         State = state;
         Value = value;
 
         Track(nameof(Value), () => Value, newValue => Value = newValue);
     }
 
-    public Task<bool> Handle(ValidationEventArgs<ItemHeader> args,
-        CancellationToken cancellationToken)
-    {
-        return Task.FromResult(true);
-    }
-
     public Task Handle(UpdateEventArgs<Item> args) =>
         Task.FromResult(State = ItemState.Write);
 
@@ -51,6 +49,14 @@ public partial class ItemHeaderViewModel :
         return Task.CompletedTask;
     }
 
+    protected override void OnValueChanged()
+    {
+        if (configuration is not null)
+        {
+            configuration.Name = Value;
+        }
+    }
+
     public Task Handle(ConfirmEventArgs<Item> args)
     {
         Commit();
@@ -61,14 +67,11 @@ public partial class ItemHeaderViewModel :
 
     public Task Handle(NotifyEventArgs<ItemCategory<string>> args)
     {
-        if (args.Value is ItemCategory<string> category)
+        if (args.Sender is ItemCategory<string> category)
         {
             Category = category.Value;
         }
 
         return Task.CompletedTask;
     }
-
-    public Task<string> Handle(ConfirmEventArgs<ItemHeader> args,
-        CancellationToken cancellationToken) => Task.FromResult(Value);
 }

Wallet/ItemNavigationViewModel.cs

@@ -68,7 +68,7 @@ public partial class ItemNavigationViewModel(IServiceProvider provider,
 
     public Task Handle(NotifyEventArgs<ItemHeader<string>> args)
     {
-        if (args.Value is ItemHeader<string> header)
+        if (args.Sender is ItemHeader<string> header)
         {
             Name = header.Value;
         }

Wallet/ItemViewModel.cs

@@ -4,7 +4,7 @@ using Toolkit.Foundation;
 namespace Wallet;
 
 public partial class ItemViewModel :
-    ObservableCollection,
+    ObservableCollection<IItemViewModel>,
     INotificationHandler<ConfirmEventArgs<Item>>,
     INotificationHandler<UpdateEventArgs<Item>>,
     INotificationHandler<CancelEventArgs<Item>>
@@ -16,16 +16,16 @@ public partial class ItemViewModel :
     private bool favourite;
 
     [ObservableProperty]
-    private ItemState state;
-
-    [ObservableProperty]
-    private string named;
+    private bool fromCategory;
 
     [ObservableProperty]
     private string name;
 
     [ObservableProperty]
-    private bool fromCategory;
+    private string named;
+
+    [ObservableProperty]
+    private ItemState state;
 
     public ItemViewModel(IServiceProvider provider,
         IServiceFactory factory,
@@ -35,11 +35,11 @@ public partial class ItemViewModel :
         IDisposer disposer,
         IContentTemplate template,
         NamedComponent named,
-        ItemState state = ItemState.Read,
-        bool fromCategory = false,
         string name = "",
+        bool fromCategory = false,
         bool favourite = false,
-        bool archived = false) : base(provider, factory, mediator, publisher, subscriber, disposer)
+        bool archived = false,
+        ItemState state = ItemState.Read) : base(provider, factory, mediator, publisher, subscriber, disposer)
     {
         Template = template;
         Named = $"{named}";
@@ -48,13 +48,19 @@ public partial class ItemViewModel :
         Favourite = favourite;
         Archived = archived;
         Name = name;
-
-        Add<ItemHeaderViewModel>("", name, state);
-        Add<ItemContentViewModel>();
     }
 
     public IContentTemplate Template { get; set; }
 
+    public override void Dispose()
+    {
+        GC.SuppressFinalize(this);
+        Publisher.Publish(Notify.As(Factory.Create<ItemCommandHeaderCollection>(new
+            List<IDisposable>())));
+
+        base.Dispose();
+    }
+
     public Task Handle(UpdateEventArgs<Item> args)
     {
         Publisher.Publish(Notify.As(Factory.Create<ItemCommandHeaderCollection>(new List<IDisposable>
@@ -67,14 +73,6 @@ public partial class ItemViewModel :
         return Task.CompletedTask;
     }
 
-    public override void Dispose()
-    {
-        Publisher.Publish(Notify.As(Factory.Create<ItemCommandHeaderCollection>(new
-            List<IDisposable>())));
-
-        base.Dispose();
-    }
-
     public Task Handle(CancelEventArgs<Item> args)
     {
         Publisher.Publish(Notify.As(Factory.Create<ItemCommandHeaderCollection>(new List<IDisposable>
@@ -95,7 +93,7 @@ public partial class ItemViewModel :
             Factory.Create<EditItemActionViewModel>(),
             Factory.Create<ArchiveItemActionViewModel>(),
         })));
-        
+
         Publisher.Publish(Confirm.As<Item>(),
             State is ItemState.New ? nameof(ItemState.New) : nameof(ItemState.Write));
 
@@ -135,4 +133,7 @@ public partial class ItemViewModel :
 
         return base.OnActivated();
     }
+
+    protected override SynchronizeExpression BuildAggregateExpression() =>
+        new(Synchronize.As<IItemViewModel, (string, string, ItemState)>(("", Name, State)));
 }

Wallet/MaskedTextEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class MaskedTextEntryViewModelHandler(IServiceFactory serviceFactory) :
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<MaskedTextEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is MaskedTextEntryConfiguration configuration)
+        if (args.Sender is MaskedTextEntryConfiguration configuration)
         {
             string? label = configuration.Label;
             object? value = configuration.Value ?? "";

Wallet/MultilineTextEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class MultilineTextEntryViewModelHandler(IServiceFactory serviceFactory)
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<MultilineTextEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is MultilineTextEntryConfiguration configuration)
+        if (args.Sender is MultilineTextEntryConfiguration configuration)
         {
             string? label = configuration.Label;
             object? value = configuration.Value ?? "";

Wallet/OpenWalletHandler.cs

@@ -11,7 +11,7 @@ public class OpenWalletHandler(IConfigurationDescriptor<WalletConfiguration> des
     public async Task<bool> Handle(ActivateEventArgs<Wallet<string>> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is Wallet<string> Wallet && 
+        if (args.Sender is Wallet<string> Wallet && 
             descriptor.Name is { Length: > 0 } name &&
             Wallet.Value is { Length: > 0 } password)
         {

Wallet/PasswordEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class PasswordEntryViewModelHandler(IServiceFactory serviceFactory) :
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<PasswordEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is PasswordEntryConfiguration configuration)
+        if (args.Sender is PasswordEntryConfiguration configuration)
         {
             string? label = configuration.Label;
             object? value = configuration.Value ?? "";

Wallet/QueryWalletHandler.cs

@@ -19,20 +19,29 @@ public class QueryWalletHandler(IDbContextFactory<WalletContext> dbContextFactor
             ExpressionStarter<ItemEntry> predicate =
                 PredicateBuilder.New<ItemEntry>(true);
 
+            if (filter is { Length: <= 0 })
+            {
+                return items;
+            }
+
             if (filter == "All")
             {
                 predicate = predicate.And(x => x.State != 2);
             }
-
-            if (filter == "Starred")
+            else if (filter == "Starred")
             {
                 predicate = predicate.And(x => x.State != 2 && x.State == 1);
             }
-
-            if (filter == "Archive")
+            else if (filter == "Archive")
             {
                 predicate = predicate.And(x => x.State == 2);
             }
+            else
+            {
+                predicate = predicate.And(x => x.State != 2)
+                    .And(x => EF.Functions.Like(x.Category, $"%{filter}%"));
+            }
+
 
             if (text is { Length: > 0 })
             {

Wallet/SynchronizeItemCollectionViewModelHandler.cs

@@ -3,16 +3,16 @@ using Toolkit.Foundation;
 
 namespace Wallet;
 
-public class SynchronizeItemViewModelHandler(IMediator mediator,
+public class SynchronizeItemCollectionViewModelHandler(IMediator mediator,
     IServiceProvider serviceProvider,
     ICache<Item<(Guid, string)>> cache,
     IPublisher publisher) :
-    INotificationHandler<SynchronizeEventArgs<ItemNavigationViewModel, WalletViewModelConfiguration>>
+    INotificationHandler<SynchronizeEventArgs<ItemNavigationViewModel, ItemCollectionConfiguration>>
 {
     public async Task Handle(SynchronizeEventArgs<ItemNavigationViewModel,
-        WalletViewModelConfiguration> args)
+        ItemCollectionConfiguration> args)
     {
-        if (args.Value is WalletViewModelConfiguration configuration)
+        if (args.Value is ItemCollectionConfiguration configuration)
         {
             cache.Clear();
             bool selected = true;

Wallet/SynchronizeItemContentFromCategoryViewModelHandler.cs

@@ -4,7 +4,7 @@ using Toolkit.Foundation;
 namespace Wallet;
 
 public class SynchronizeItemContentFromCategoryViewModelHandler(IItemConfigurationCollection configurations,
-    IDecoratorService<ItemConfiguration> decoratorItemConfiguration,
+    IDecoratorService<ItemConfiguration> itemConfigurationDecorator,
     IServiceFactory serviceFactory,
     IMediator mediator,
     IPublisher publisher) :
@@ -18,7 +18,7 @@ public class SynchronizeItemContentFromCategoryViewModelHandler(IItemConfigurati
             {
                 if (configurationFactory.Invoke() is ItemConfiguration configuration)
                 {
-                    decoratorItemConfiguration.Set(configuration);
+                    itemConfigurationDecorator.Set(configuration);
                     foreach (ItemSectionConfiguration configurationSection in configuration.Sections)
                     {
                         string id = $"{nameof(ItemSection)}:{Guid.NewGuid()}";

Wallet/TextEntryViewModelHandler.cs

@@ -8,7 +8,7 @@ public class TextEntryViewModelHandler(IServiceFactory serviceFactory) :
     public Task<IItemEntryViewModel?> Handle(CreateEventArgs<TextEntryConfiguration> args,
         CancellationToken cancellationToken)
     {
-        if (args.Value is TextEntryConfiguration configuration)
+        if (args.Sender is TextEntryConfiguration configuration)
         {
             string? label = configuration.Label;
             object? value = configuration.Value ?? "";

Wallet/WalletActivatedHandler.cs

@@ -9,7 +9,7 @@ public class WalletActivatedHandler(IWalletHostCollection Wallets,
 {
     public Task Handle(ActivatedEventArgs<IComponentHost> args)
     {
-        if (args.Value is IComponentHost Wallet)
+        if (args.Sender is IComponentHost Wallet)
         {
             List<IComponentHost> sortedWallets = [.. Wallets, Wallet];
             sortedWallets = [.. sortedWallets.OrderBy(x => x.Services.GetRequiredService<IConfigurationDescriptor<WalletConfiguration>>() is 

Wallet/WalletHeaderViewModel.cs

@@ -18,7 +18,7 @@ public partial class WalletHeaderViewModel(IServiceProvider provider,
     {
         Clear();
 
-        if (args.Value is WalletCommandHeaderCollection commandCollection)
+        if (args.Sender is WalletCommandHeaderCollection commandCollection)
         {
             foreach (IDisposable command in commandCollection)
             {