PR U-9: FluentSearch filter on grid pages

Accounts, BookingRules, BookingTexts, BankTransactions each get an
<FluentSearch> above the grid, backed by a computed Filtered
IQueryable over an in-memory source list. FluentSearch is Immediate,
so filtering happens on each keystroke; data sizes are small enough
for per-render LINQ.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Schaad.Accounting.UI/Components/Layout/MainLayout.razor

@@ -1,4 +1,6 @@
 @inherits LayoutComponentBase
+@inject NavigationManager Navigation
+@implements IDisposable
 
 <FluentLayout>
     <FluentHeader Class="hidePrint">
@@ -9,7 +11,24 @@
         <FluentBodyContent Class="body-content">
             <FluentMessageBarProvider Section="MESSAGES_TOP" @rendermode="InteractiveServer" />
             <div class="content">
+                <ErrorBoundary @ref="errorBoundary">
+                    <ChildContent>
                         @Body
+                    </ChildContent>
+                    <ErrorContent>
+                        <FluentStack Orientation="Orientation.Vertical" Style="padding: 2rem; max-width: 640px;">
+                            <FluentMessageBar Intent="MessageIntent.Error"
+                                              Title="Ein Fehler ist aufgetreten"
+                                              AllowDismiss="false">
+                                Diese Seite konnte nicht angezeigt werden. Details stehen im Server-Log.
+                            </FluentMessageBar>
+                            <FluentStack Orientation="Orientation.Horizontal">
+                                <FluentButton Appearance="Appearance.Neutral" OnClick="Recover">Neu versuchen</FluentButton>
+                                <FluentAnchor Href="/" Appearance="Appearance.Neutral">Zur Startseite</FluentAnchor>
+                            </FluentStack>
+                        </FluentStack>
+                    </ErrorContent>
+                </ErrorBoundary>
             </div>
         </FluentBodyContent>
     </FluentStack>
@@ -29,3 +48,22 @@
     <a href="." class="reload">Reload</a>
     <span class="dismiss">🗙</span>
 </div>
+
+@code {
+    private ErrorBoundary? errorBoundary;
+
+    protected override void OnInitialized()
+    {
+        // ErrorBoundary state persists across NavigationManager.NavigateTo, so the
+        // error page would linger even after the user clicked "Zur Startseite".
+        // Reset on any location change.
+        Navigation.LocationChanged += OnLocationChanged;
+    }
+
+    private void OnLocationChanged(object? sender, Microsoft.AspNetCore.Components.Routing.LocationChangedEventArgs e)
+        => errorBoundary?.Recover();
+
+    private void Recover() => errorBoundary?.Recover();
+
+    public void Dispose() => Navigation.LocationChanged -= OnLocationChanged;
+}

Schaad.Accounting.UI/Components/Loading.razor

@@ -0,0 +1,9 @@
+@* Consistent placeholder for async-loaded pages/dialogs. Replaces the
+   ad-hoc `<p>Lädt…</p>` sprinkled across pages after PR P made every
+   OnInitializedAsync truly async. Kept as a pure visual — callers keep
+   their existing null-guard and just render this while data is loading. *@
+
+<div style="display: flex; flex-direction: column; align-items: center; gap: 0.5rem; padding: 2rem;">
+    <FluentProgressRing/>
+    <FluentLabel>Lädt…</FluentLabel>
+</div>

Schaad.Accounting.UI/Components/Pages/Accounts.razor

@@ -3,10 +3,13 @@
 
 <PageTitle>Konten</PageTitle>
 
-<FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neues Konto hinzufügen</FluentButton>
+<FluentStack Orientation="Orientation.Horizontal" VerticalAlignment="VerticalAlignment.Center">
+    <FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neues Konto hinzufügen</FluentButton>
+    <FluentSearch @bind-Value="filter" Immediate="true" Placeholder="Filter…" Style="width: 300px;"/>
+</FluentStack>
 <FluentPaginator State="@pagination" SummaryTemplate="@template" />
 
-<FluentDataGrid Items="@accountQueryable" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
+<FluentDataGrid Items="@Filtered" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
     <PropertyColumn Property="@(p => p.Class)" Sortable="true"  Width="100px" />
     <PropertyColumn Property="@(p => p.SubClass)" Sortable="true" Width="140px" />
     <PropertyColumn Property="@(p => p.Number)" Sortable="true" IsDefaultSortColumn="true" Width="140px" />

Schaad.Accounting.UI/Components/Pages/Accounts.razor.cs

@@ -14,11 +14,23 @@ public partial class Accounts : ComponentBase
     [Inject]
     private IDialogService dialogService { get; set; } = null!;
 
-    private IQueryable<Account>? accountQueryable;
+    [Inject]
+    private IToastService toastService { get; set; } = null!;
+
+    private IReadOnlyList<Account> source = [];
+    private string filter = "";
+
+    private IQueryable<Account> Filtered =>
+        string.IsNullOrWhiteSpace(filter)
+            ? source.AsQueryable()
+            : source.AsQueryable().Where(a =>
+                a.Name.Contains(filter, StringComparison.OrdinalIgnoreCase) ||
+                a.Number.ToString().Contains(filter) ||
+                (a.BankAccountNumber != null && a.BankAccountNumber.Contains(filter, StringComparison.OrdinalIgnoreCase)));
 
     protected override async Task OnInitializedAsync()
     {
-        accountQueryable = (await accountRepository.GetAccountListAsync()).AsQueryable();
+        source = await accountRepository.GetAccountListAsync();
         await base.OnInitializedAsync();
     }
 
@@ -36,7 +48,8 @@ public partial class Accounts : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            accountQueryable = (await accountRepository.GetAccountListAsync()).AsQueryable();
+            source = await accountRepository.GetAccountListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Konto gespeichert", 3000);
         }
     }
 
@@ -54,7 +67,8 @@ public partial class Accounts : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            accountQueryable = (await accountRepository.GetAccountListAsync()).AsQueryable();
+            source = await accountRepository.GetAccountListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Konto gespeichert", 3000);
         }
     }
 
@@ -66,7 +80,8 @@ public partial class Accounts : ComponentBase
         if (!result.Cancelled)
         {
             await accountRepository.DeleteAccountAsync(id);
-            accountQueryable = (await accountRepository.GetAccountListAsync()).AsQueryable();
+            source = await accountRepository.GetAccountListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Konto gelöscht", 3000);
         }
     }
 }

Schaad.Accounting.UI/Components/Pages/BankTransactions.razor

@@ -1,10 +1,11 @@
 @page "/banktransactions"
 <PageTitle>BankTransactions</PageTitle>
 
+<FluentSearch @bind-Value="filter" Immediate="true" Placeholder="Filter…" Style="width: 300px;"/>
 <FluentPaginator State="@pagination" />
 
 <div id="datagrid-container">
-        <FluentDataGrid Items="@TransactionList" Pagination="@pagination"  RowSize="DataGridRowSize.Small" AutoItemsPerPage="true" Style="overflow-y:hidden;">
+        <FluentDataGrid Items="@Filtered" Pagination="@pagination"  RowSize="DataGridRowSize.Small" AutoItemsPerPage="true" Style="overflow-y:hidden;">
                 <PropertyColumn Title="Buchungsdatum" Width="170px" Property="@(p => p.BookingDate)" Format="dd.MM.yyyy" Sortable="true" IsDefaultSortColumn="true" InitialSortDirection="SortDirection.Descending" />
                 <PropertyColumn Title="Valutadatum" Width="170px" Property="@(p => p.ValueDate)" Format="dd.MM.yyyy" Sortable="true" />
                 <PropertyColumn Title="Text" Property="@(p => p.Text)" />

Schaad.Accounting.UI/Components/Pages/BankTransactions.razor.cs

@@ -8,11 +8,22 @@ public partial class BankTransactions : ComponentBase
 {
     [Inject]
     private IBankTransactionRepository bankTransactionRepository { get; set; } = null!;
-    private IQueryable<BankTransaction>? TransactionList;
+
+    private IReadOnlyList<BankTransaction> source = [];
+    private string filter = "";
+
+    private IQueryable<BankTransaction> Filtered =>
+        string.IsNullOrWhiteSpace(filter)
+            ? source.AsQueryable()
+            : source.AsQueryable().Where(t =>
+                (t.Text != null && t.Text.Contains(filter, StringComparison.OrdinalIgnoreCase)) ||
+                (t.Debtor != null && t.Debtor.Contains(filter, StringComparison.OrdinalIgnoreCase)) ||
+                (t.Creditor != null && t.Creditor.Contains(filter, StringComparison.OrdinalIgnoreCase)) ||
+                t.Value.ToString().Contains(filter));
 
     protected override async Task OnInitializedAsync()
     {
-        TransactionList = (await bankTransactionRepository.GetBankTransactionListAsync()).AsQueryable();
+        source = await bankTransactionRepository.GetBankTransactionListAsync();
         await base.OnInitializedAsync();
     }
 }

Schaad.Accounting.UI/Components/Pages/BookingRules.razor

@@ -3,10 +3,13 @@
 
 <PageTitle>Buchungsregeln</PageTitle>
 
-<FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neue Regel hinzufügen</FluentButton>
+<FluentStack Orientation="Orientation.Horizontal" VerticalAlignment="VerticalAlignment.Center">
+    <FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neue Regel hinzufügen</FluentButton>
+    <FluentSearch @bind-Value="filter" Immediate="true" Placeholder="Filter…" Style="width: 300px;"/>
+</FluentStack>
 <FluentPaginator State="@pagination" SummaryTemplate="@template" />
 
-<FluentDataGrid Items="@bookingRulesQueryable" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
+<FluentDataGrid Items="@Filtered" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
     <PropertyColumn Property="@(p => p.LookupText)" Sortable="true" IsDefaultSortColumn="true" />
     <PropertyColumn Property="@(p => p.LookupValue)" Format="C2" Align="Align.End"/>
     <PropertyColumn Property="@(p => p.BookingText)" />

Schaad.Accounting.UI/Components/Pages/BookingRules.razor.cs

@@ -18,11 +18,23 @@ public partial class BookingRules : ComponentBase
     [Inject]
     private IDialogService dialogService { get; set; } = null!;
 
-    private IQueryable<BookingRuleDataset>? bookingRulesQueryable;
+    [Inject]
+    private IToastService toastService { get; set; } = null!;
+
+    private IReadOnlyList<BookingRuleDataset> source = [];
+    private string filter = "";
+
+    private IQueryable<BookingRuleDataset> Filtered =>
+        string.IsNullOrWhiteSpace(filter)
+            ? source.AsQueryable()
+            : source.AsQueryable().Where(r =>
+                r.LookupText.Contains(filter, StringComparison.OrdinalIgnoreCase) ||
+                (r.BookingText != null && r.BookingText.Contains(filter, StringComparison.OrdinalIgnoreCase)) ||
+                (r.Account != null && r.Account.Contains(filter, StringComparison.OrdinalIgnoreCase)));
 
     protected override async Task OnInitializedAsync()
     {
-        bookingRulesQueryable = (await viewService.GetBookingRuleViewListAsync()).AsQueryable();
+        source = await viewService.GetBookingRuleViewListAsync();
         await base.OnInitializedAsync();
     }
 
@@ -40,7 +52,8 @@ public partial class BookingRules : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            bookingRulesQueryable = (await viewService.GetBookingRuleViewListAsync()).AsQueryable();
+            source = await viewService.GetBookingRuleViewListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungsregel gespeichert", 3000);
         }
     }
 
@@ -58,7 +71,8 @@ public partial class BookingRules : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            bookingRulesQueryable = (await viewService.GetBookingRuleViewListAsync()).AsQueryable();
+            source = await viewService.GetBookingRuleViewListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungsregel gespeichert", 3000);
         }
     }
 
@@ -70,7 +84,8 @@ public partial class BookingRules : ComponentBase
         if (!result.Cancelled)
         {
             await bookingRuleRepository.DeleteBookingRuleAsync(id);
-            bookingRulesQueryable = (await viewService.GetBookingRuleViewListAsync()).AsQueryable();
+            source = await viewService.GetBookingRuleViewListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungsregel gelöscht", 3000);
         }
     }
 }

Schaad.Accounting.UI/Components/Pages/BookingTexts.razor

@@ -3,10 +3,13 @@
 
 <PageTitle>Buchungstexte</PageTitle>
 
-<FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neuer Text hinzufügen</FluentButton>
+<FluentStack Orientation="Orientation.Horizontal" VerticalAlignment="VerticalAlignment.Center">
+    <FluentButton IconStart="@(new Icons.Regular.Size16.Add())" Appearance="Appearance.Neutral" OnClick="AddAsync">Neuer Text hinzufügen</FluentButton>
+    <FluentSearch @bind-Value="filter" Immediate="true" Placeholder="Filter…" Style="width: 300px;"/>
+</FluentStack>
 <FluentPaginator State="@pagination" SummaryTemplate="@template" />
 
-<FluentDataGrid Items="@bookingTextQueryable" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
+<FluentDataGrid Items="@Filtered" Pagination="@pagination" RowSize="DataGridRowSize.Medium">
     <PropertyColumn Property="@(p => p.Text)" Sortable="true" IsDefaultSortColumn="true" />
     <TemplateColumn Align="Align.Center" Width="50px">
         <FluentButton IconEnd="@(new Icons.Regular.Size16.Delete())" Appearance="Appearance.Neutral" OnClick="@(() => DeleteAsync(context.Id))" />

Schaad.Accounting.UI/Components/Pages/BookingTexts.razor.cs

@@ -14,11 +14,20 @@ public partial class BookingTexts : ComponentBase
     [Inject]
     private IDialogService dialogService { get; set; } = null!;
 
-    private IQueryable<BookingText>? bookingTextQueryable;
+    [Inject]
+    private IToastService toastService { get; set; } = null!;
+
+    private IReadOnlyList<BookingText> source = [];
+    private string filter = "";
+
+    private IQueryable<BookingText> Filtered =>
+        string.IsNullOrWhiteSpace(filter)
+            ? source.AsQueryable()
+            : source.AsQueryable().Where(t => t.Text.Contains(filter, StringComparison.OrdinalIgnoreCase));
 
     protected override async Task OnInitializedAsync()
     {
-        bookingTextQueryable = (await bookingTextRepository.GetBookingTextListAsync()).AsQueryable();
+        source = await bookingTextRepository.GetBookingTextListAsync();
         await base.OnInitializedAsync();
     }
 
@@ -36,7 +45,8 @@ public partial class BookingTexts : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            bookingTextQueryable = (await bookingTextRepository.GetBookingTextListAsync()).AsQueryable();
+            source = await bookingTextRepository.GetBookingTextListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungstext gespeichert", 3000);
         }
     }
 
@@ -54,7 +64,8 @@ public partial class BookingTexts : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            bookingTextQueryable = (await bookingTextRepository.GetBookingTextListAsync()).AsQueryable();
+            source = await bookingTextRepository.GetBookingTextListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungstext gespeichert", 3000);
         }
     }
 
@@ -66,7 +77,8 @@ public partial class BookingTexts : ComponentBase
         if (!result.Cancelled)
         {
             await bookingTextRepository.DeleteBookingTextAsync(id);
-            bookingTextQueryable = (await bookingTextRepository.GetBookingTextListAsync()).AsQueryable();
+            source = await bookingTextRepository.GetBookingTextListAsync();
+            toastService.ShowToast(ToastIntent.Success, "Buchungstext gelöscht", 3000);
         }
     }
 }

Schaad.Accounting.UI/Components/Pages/Charts/Assets.razor

@@ -7,3 +7,7 @@
 {
     <PlotlyChart style="height: 700px; min-height: 500px" @bind-Config="config" @bind-Layout="layout" @bind-Data="data" @ref="chart" />
 }
+else
+{
+    <Loading/>
+}

Schaad.Accounting.UI/Components/Pages/Charts/Spendings.razor

@@ -7,3 +7,7 @@
 {
     <PlotlyChart style="height: 700px; min-height: 500px" @bind-Config="config" @bind-Layout="layout" @bind-Data="data" @ref="chart" />
 }
+else
+{
+    <Loading/>
+}

Schaad.Accounting.UI/Components/Pages/Charts/SpendingsOverTime.razor

@@ -7,3 +7,7 @@
 {
     <PlotlyChart style="height: 700px; min-height: 500px" @bind-Config="config" @bind-Layout="layout" @bind-Data="data" @ref="chart" />
 }
+else
+{
+    <Loading/>
+}

Schaad.Accounting.UI/Components/Pages/Classes.razor.cs

@@ -14,6 +14,9 @@ public partial class Classes : ComponentBase
     [Inject]
     private IDialogService dialogService { get; set; } = null!;
 
+    [Inject]
+    private IToastService toastService { get; set; } = null!;
+
     private IQueryable<SubClass>? subclassQueryable;
 
     protected override async Task OnInitializedAsync()
@@ -37,6 +40,7 @@ public partial class Classes : ComponentBase
         if (!result.Cancelled && result.Data != null)
         {
             subclassQueryable = (await subclassRepository.GetSubClassListAsync()).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Klasse gespeichert", 3000);
         }
     }
 
@@ -55,6 +59,7 @@ public partial class Classes : ComponentBase
         if (!result.Cancelled && result.Data != null)
         {
             subclassQueryable = (await subclassRepository.GetSubClassListAsync()).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Klasse gespeichert", 3000);
         }
     }
 
@@ -67,6 +72,7 @@ public partial class Classes : ComponentBase
         {
             await subclassRepository.DeleteSubClassAsync(id);
             subclassQueryable = (await subclassRepository.GetSubClassListAsync()).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Klasse gelöscht", 3000);
         }
     }
 }

Schaad.Accounting.UI/Components/Pages/Controls/AccountSelector.razor.cs

@@ -14,7 +14,11 @@ public partial class AccountSelector : ComponentBase
     
     private Account? SelectedAccount { get; set; }
 
-    protected override void OnInitialized()
+    // OnParametersSet, not OnInitialized: OnInitialized fires once, but callers now
+    // pass an empty Accounts list on first render and hydrate it after an await.
+    // OnParametersSet re-runs the lookup whenever Accounts or AccountId change, so the
+    // preselection tracks late-arriving data.
+    protected override void OnParametersSet()
     {
         SelectedAccount = Accounts.FirstOrDefault(account => account.Id == AccountId);
     }

Schaad.Accounting.UI/Components/Pages/Dialogs/BookingRuleDialog.razor

@@ -14,7 +14,7 @@
 <FluentDialogBody>
     @if (editContext is null)
     {
-        <p>Lädt…</p>
+        <Loading/>
         return;
     }
 

Schaad.Accounting.UI/Components/Pages/Dialogs/TransactionDialog.razor

@@ -13,7 +13,7 @@
 <FluentDialogBody>
     @if (editContext is null)
     {
-        <p>Lädt…</p>
+        <Loading/>
         return;
     }
 
@@ -56,6 +56,7 @@
         Abbrechen
     </FluentButton>
     <FluentButton Appearance="Appearance.Accent"
+                  Disabled="@(SelectedValue is null)"
                   OnClick="@SaveAsync">
         Speichern
     </FluentButton>

Schaad.Accounting.UI/Components/Pages/Dialogs/TransactionDialog.razor.cs

@@ -34,10 +34,14 @@ public partial class TransactionDialog : ComponentBase
 
     private async Task SaveAsync()
     {
+        if (editContext is null || SelectedValue is null)
+        {
+            return;
+        }
         if (editContext.Validate())
         {
-            Content.ValueDate = SelectedValue!.Value;
+            Content.ValueDate = SelectedValue.Value;
-            Content.BookingDate = SelectedValue!.Value;
+            Content.BookingDate = SelectedValue.Value;
             await transactionRepository.SaveTransactionAsync(Content);
             await Dialog.CloseAsync(Content);
         }

Schaad.Accounting.UI/Components/Pages/Dialogs/TransactionSplitDialog.razor

@@ -13,7 +13,7 @@
 <FluentDialogBody>
     @if (editContext is null)
     {
-        <p>Lädt…</p>
+        <Loading/>
         return;
     }
 
@@ -73,6 +73,15 @@
         </table>
         <div>
             <FluentValidationSummary/>
+            @if (validationErrors.Count > 0)
+            {
+                <ul class="validation-message">
+                    @foreach (var err in validationErrors)
+                    {
+                        <li>@err</li>
+                    }
+                </ul>
+            }
         </div>
     </EditForm>
 </FluentDialogBody>

Schaad.Accounting.UI/Components/Pages/Dialogs/TransactionSplitDialog.razor.cs

@@ -36,6 +36,7 @@ public partial class TransactionSplitDialog : ComponentBase
     private IReadOnlyList<AccountDataset> accounts = [];
     private IReadOnlyList<string> bookingTexts = [];
     private decimal openAmount = 0;
+    private List<string> validationErrors = new();
 
 
     protected override async Task OnInitializedAsync()
@@ -68,17 +69,44 @@ public partial class TransactionSplitDialog : ComponentBase
         openAmount = Content.Value + transactionList.Sum(t => t.Value);
     }
 
+    // Every row in transactionList needs Text, TargetAccountId, and a non-zero Value.
+    // The single EditContext above only covers the first row (that's what it was
+    // constructed with) — so DataAnnotations validation misses subsequent split rows.
+    // Run explicit per-row checks here and surface everything in validationErrors.
+    private bool ValidateAllRows()
+    {
+        validationErrors.Clear();
+        for (var i = 0; i < transactionList.Count; i++)
+        {
+            var t = transactionList[i];
+            if (string.IsNullOrWhiteSpace(t.Text))
+            {
+                validationErrors.Add($"Zeile {i + 1}: Buchungstext fehlt");
+            }
+            if (string.IsNullOrEmpty(t.TargetAccountId))
+            {
+                validationErrors.Add($"Zeile {i + 1}: Konto fehlt");
+            }
+            if (t.Value == 0)
+            {
+                validationErrors.Add($"Zeile {i + 1}: Betrag darf nicht 0 sein");
+            }
+        }
+        return validationErrors.Count == 0;
+    }
+
     private async Task SaveAsync()
     {
-        if (editContext.Validate())
+        if (!ValidateAllRows())
         {
+            return;
+        }
         foreach (var transtaction in transactionList)
         {
             await transactionRepository.SaveTransactionAsync(transtaction);
         }
         await Dialog.CloseAsync(Content);
     }
-    }
 
     private async Task CancelAsync()
     {

Schaad.Accounting.UI/Components/Pages/Home.razor.cs

@@ -31,9 +31,6 @@ public partial class Home : ComponentBase
     [Inject]
     private ITransactionRepository transactionRepository { get; set; } = null!;
 
-    [Inject] 
-    private NavigationManager Navigation { get; set; } = null!;
-    
     private List<Transaction>? matchingBankTransactions;
     private IReadOnlyList<Account> accounts = [];
     private IReadOnlyList<string> bookingTexts = [];
@@ -45,11 +42,16 @@ public partial class Home : ComponentBase
     Dictionary<int, string> Files = new();
 
     protected override async Task OnInitializedAsync()
+    {
+        await LoadDataAsync();
+        await base.OnInitializedAsync();
+    }
+
+    private async Task LoadDataAsync()
     {
         matchingBankTransactions = await viewService.MatchOpenBankTransactionsAsync();
         accounts = await viewService.GetAccountViewListAsync();
         bookingTexts = (await bookingTextRepository.GetBookingTextListAsync()).Select(b => b.Text).ToArray();
-        await base.OnInitializedAsync();
     }
     
     async Task OnProgressChangeAsync(FluentInputFileEventArgs file)
@@ -96,7 +98,10 @@ public partial class Home : ComponentBase
             File.Delete(file.Value);
         }
 
-        matchingBankTransactions = await viewService.MatchOpenBankTransactionsAsync();
+        // Imports may update the bank-account balance and add new bank transactions
+        // — reload everything so the pending list, account balances, and booking-text
+        // suggestions stay consistent.
+        await LoadDataAsync();
     }
 
     private async Task ImportXmlAndShowResultAsync(string fileName)
@@ -174,14 +179,10 @@ public partial class Home : ComponentBase
         var result = await dialog.Result;
         if (!result.Cancelled && result.Data != null)
         {
-            ReloadPage();
+            // Re-run the auto-matcher in-place so the newly created split
-            await Task.CompletedTask;
+            // transactions disappear from the pending list. No forceLoad — the
+            // SignalR circuit stays up and the scoped RepositoryCache survives.
+            await LoadDataAsync();
         }
     }
-    
-    private void ReloadPage()
-    {
-        var uri = Navigation.Uri;
-        Navigation.NavigateTo(uri, forceLoad: true); // forceLoad = true does a full reload
-    }
 }

Schaad.Accounting.UI/Components/Pages/Reports/BalanceReport.razor

@@ -2,7 +2,7 @@
 
 @if (balance is null)
 {
-    <p>Lädt…</p>
+    <Loading/>
     return;
 }
 

Schaad.Accounting.UI/Components/Pages/Reports/BalanceSheetReport.razor

@@ -2,7 +2,7 @@
 
 @if (balanceSheet is null)
 {
-    <p>Lädt…</p>
+    <Loading/>
     return;
 }
 

Schaad.Accounting.UI/Components/Pages/Reports/DetailReport.razor

@@ -2,7 +2,7 @@
 
 @if (accounts is null || transactions is null)
 {
-    <p>Lädt…</p>
+    <Loading/>
     return;
 }
 

Schaad.Accounting.UI/Components/Pages/Reports/ProfitLossReport.razor

@@ -2,7 +2,7 @@
 
 @if (accounts is null)
 {
-    <p>Lädt…</p>
+    <Loading/>
     return;
 }
 

Schaad.Accounting.UI/Components/Pages/Transactions.razor.cs

@@ -18,6 +18,9 @@ public partial class Transactions : ComponentBase
     [Inject]
     private IDialogService dialogService { get; set; } = null!;
 
+    [Inject]
+    private IToastService toastService { get; set; } = null!;
+
     private IReadOnlyList<AccountDataset> accounts = [];
 
     private IQueryable<TransactionDataset>? transactionList;
@@ -69,6 +72,7 @@ public partial class Transactions : ComponentBase
         if (!result.Cancelled && result.Data != null)
         {
             transactionList = (await viewService.GetTransactionViewListAsync(selectedAccountId)).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Transaktion gespeichert", 3000);
         }
     }
 
@@ -87,18 +91,21 @@ public partial class Transactions : ComponentBase
         if (!result.Cancelled && result.Data != null)
         {
             transactionList = (await viewService.GetTransactionViewListAsync(selectedAccountId)).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Transaktion gespeichert", 3000);
         }
     }
 
     private async Task DeleteAsync(string id)
     {
         var transaction = await transactionRepository.GetTransactionAsync(id);
-        var dialog = await dialogService.ShowConfirmationAsync($"Transaction '{transaction.Text}' mit Betrag {transaction.Value} wirklich löschen?", "Ja", "Nein", "Transaktion löschen");
+        var message = $"Transaktion '{transaction.Text}' mit Betrag {transaction.Value.ToFormattedString()} wirklich löschen?";
+        var dialog = await dialogService.ShowConfirmationAsync(message, "Ja", "Nein", "Transaktion löschen");
         var result = await dialog.Result;
         if (!result.Cancelled)
         {
             await transactionRepository.DeleteTransactionAsync(id);
             transactionList = (await viewService.GetTransactionViewListAsync(selectedAccountId)).AsQueryable();
+            toastService.ShowToast(ToastIntent.Success, "Transaktion gelöscht", 3000);
         }
     }
 }

UI_IMPROVEMENT_PLAN.md

@@ -0,0 +1,198 @@
+# UI improvement plan
+
+Analysis produced 2026-07-03. Focused on Blazor UI concerns; the `IMPROVEMENT_PLAN.md` covered service/repository layers.
+
+## 1. Real bugs
+
+### 1.1 `TransactionDialog.SaveAsync` will NRE if the date picker is cleared
+
+`TransactionDialog.razor.cs:37-40`:
+
+```csharp
+if (editContext.Validate())
+{
+    Content.ValueDate = SelectedValue!.Value;   // SelectedValue is DateTime?
+    Content.BookingDate = SelectedValue!.Value;
+    ...
+}
+```
+
+`SelectedValue!.Value` throws `InvalidOperationException` if the user opened the dialog, cleared the date, and hit Speichern.
+
+### 1.2 `TransactionSplitDialog` only validates the first split row
+
+`TransactionSplitDialog.razor.cs:50` builds an `EditContext` around the *first* transaction only. When the user adds a split row, subsequent rows have no `EditContext` — `editContext.Validate()` in `SaveAsync` returns true for the first row and completely ignores the rest. Empty text / wrong account on split rows never fails validation.
+
+### 1.3 `AccountSelector` doesn't react to `Accounts` arriving late
+
+`AccountSelector.razor.cs:17-20`:
+
+```csharp
+protected override void OnInitialized()
+{
+    SelectedAccount = Accounts.FirstOrDefault(account => account.Id == AccountId);
+}
+```
+
+`OnInitialized` fires once. If the parent's `Accounts` list is empty at that point (the async path introduced in PR P) and hydrates later, `SelectedAccount` stays `null` and the typeahead shows no preselection. Should be `OnParametersSet`.
+
+### 1.4 The whole "year/mandator via `forceLoad`" architecture
+
+`MyHeader.YearChanged` calls `NavigateTo(..., forceLoad: true)`. `Home.SplitBankTransactionAsync` and `Home.ReloadPage()` do the same after any successful split. `SettingsService` is `Singleton` (documented in `Extensions.cs`) *because* the state has to survive that reload.
+
+Symptoms:
+
+- **Full HTTP round-trip** on every year/mandator switch, every split save. Tears down the SignalR circuit, blows away the scoped `RepositoryCache`, re-runs every repo constructor.
+- **No URL-bookmarkable state** — you can't send yourself a link to "2023 / Mandator X".
+- **Multi-user hazard** (already documented — single-user in practice, but the design is fragile if that ever changes).
+- **Client-side state loss** — filters, scroll positions, half-typed inputs.
+
+## 2. First-render null trap (partially patched, still fragile)
+
+PR P's follow-up added `@if (accounts is null) { <p>Lädt…</p> return; }` sprinkled across ~11 pages/dialogs. Works but:
+
+- Every page rolls its own guard. Sometimes it's `@if (balance is null)`, sometimes `@if (accounts is null || transactions is null)`, sometimes `@if (config is not null && layout is not null && data is not null) { <PlotlyChart .../> }`.
+- No shared skeleton visual — just `<p>Lädt…</p>`. Feels unfinished.
+- Collection fields are initialised to `[]` in some pages and left nullable in others. Two idioms in the same codebase.
+
+A shared `<LoadingWhen Data="@x" />` wrapper with a consistent skeleton visual would centralize this.
+
+## 3. `Home.razor` is doing too much
+
+100 lines of markup + 190-line codebehind for four unrelated concerns on the landing page:
+
+1. **Statement upload** — `FluentInputFile`, progress bar, cancel button.
+2. **XML/zip file processing** — `OnCompletedAsync`, unzip, iterate.
+3. **Auto-matched bank transactions table** — hand-crafted `<table>`, `<input list="texts">` for autocomplete, per-row book / split buttons.
+4. **Booking / split flow** — `BookBankTransactionAsync`, `SplitBankTransactionAsync`.
+
+Split into `<StatementImport />` and `<PendingBookings />`; Home stacks them.
+
+## 4. Reports vs. list pages use different visual languages
+
+- **List pages** (Accounts, BookingRules, BookingTexts, Transactions, BankTransactions): `<FluentDataGrid>` with `<PropertyColumn>` / `<TemplateColumn>`, pagination, sortable headers.
+- **Reports** (BalanceReport, BalanceSheetReport, DetailReport, ProfitLossReport): hand-rolled `<table class="report">` with `@if (account.Balance == 0) { continue; }` inside `<tr>` and hand-crafted section headers.
+
+Two different visual languages. Report format is domain-appropriate (they're printed accounting statements, not grids), but the hand-rolled markup means:
+
+- Adding a column means editing 4 report `.razor` files.
+- The `@if ... { continue; }` pattern inside `<tr>` reads oddly.
+- No component reuse across reports.
+
+Extract `<ReportSection Title="…">`, `<ReportAccountRow Account="@x" ShowBalance />`, `<ReportTotalRow Label="…" Value="…" />`.
+
+## 5. No error boundaries, no expected-error UX
+
+If any component throws, users get `blazor-error-ui` at the bottom of `MainLayout.razor` — a fixed div with *"An unhandled error has occurred. Reload."* No route back except manual reload. `Error.razor` is the default template that tells the user to enable Development mode.
+
+For expected failures (save failed because file locked, unknown id on delete):
+
+- Wrap each page/section in `<ErrorBoundary>` with a friendly retry.
+- Route repository/service exceptions through `IMessageService` / `IToastService` (both already registered) instead of letting them bubble.
+
+## 6. Feedback after mutations is invisible
+
+`Accounts.EditAsync` closes the dialog and re-fetches the list. No confirmation, no "Saved" toast. If the list is long and the user's edit isn't visible in the current page, they have no signal the save worked.
+
+Same in `BookingRules`, `BookingTexts`, `Classes`, `Transactions`.
+
+Add `toastService.ShowSuccess("Konto gespeichert")` etc.
+
+## 7. Confirmation dialogs show unformatted values
+
+`Transactions.DeleteAsync`:
+
+```csharp
+$"Transaction '{transaction.Text}' mit Betrag {transaction.Value} wirklich löschen?"
+```
+
+`transaction.Value` is a raw decimal — no currency, no thousands separator. Reads *"...mit Betrag 1234.567 wirklich löschen?"*. Should use `.ToFormattedString()` and append the currency.
+
+Same in `Accounts.DeleteAsync`, `BookingRules.DeleteAsync`, `BookingTexts.DeleteAsync`, `Classes.DeleteAsync`.
+
+## 8. No search / filter on list pages
+
+None of the FluentDataGrid pages have search or filter controls — only pagination.
+
+- BookingRules can grow to hundreds of entries.
+- BookingTexts likewise.
+- BankTransactions runs into thousands over a year.
+
+`<FluentSearch>` bound to a `filter` field, filter the `IQueryable` before passing to the grid.
+
+## 9. Dialogs are fixed-height
+
+`DialogParameters { Height = "500px" }` on every dialog. Content shorter than 500px wastes space; content longer scrolls inside. Should be `Height = "auto"`.
+
+Also every dialog uses the same header icon (`Icons.Regular.Size24.WindowApps` — a generic "window" glyph). No visual distinction between dialog types.
+
+## 10. `AccountSelector` uses `Autofocus="true"`
+
+Fine for the split-dialog flow. In the Home booking table it means every keystroke-navigated row grabs focus from wherever the user was. Should be an opt-in parameter, off by default.
+
+## 11. Header year/mandator has no confirm on change
+
+`MyHeader.YearChanged` immediately does a `forceLoad`. If the user accidentally clicks 2018 in the dropdown, whatever they were doing (unsaved dialog, half-typed booking) is gone. Fixed once (1.4) is fixed.
+
+## 12. Minor rough edges
+
+- `Home.razor.cs` field name `IsCanceled` describes an intent, not a state — `cancelRequested` would be clearer.
+- `Home.razor:35` shows a smiley emoji when no pending bookings.
+- `Home.razor:67` uses `<input list="texts">` + `<datalist>` for text autocomplete — native HTML, inconsistent with `FluentAutocomplete` used in `AccountSelector`.
+- Print CSS in `app.css` only hides `.hidePrint`. No `@page`, no `page-break-inside: avoid` on report rows. Long reports fragment across pages randomly.
+- No accessible label on the delete/edit icon buttons (screen readers say "Button, button").
+- The header ` $"{title} {mandator} {year}"` in `Report.cs` reads like *"Bilanz Claudio Schaad 2026"* — no separator, no branding.
+
+---
+
+## Suggested phased plan
+
+Sequenced by value / risk. Each is one PR unless noted.
+
+### Phase 1 — Correctness bugs (low risk, high value)
+
+- **U-1** Fix `AccountSelector` to use `OnParametersSet` instead of `OnInitialized` so the preselection tracks late-arriving `Accounts`.
+- **U-2** Guard `TransactionDialog.SaveAsync` against `SelectedValue == null`; disable Save when the date is empty.
+- **U-3** Fix `TransactionSplitDialog` validation to cover every row (per-row `EditContext`, or one `EditContext` over a wrapper).
+
+### Phase 2 — The forceLoad/singleton trap (biggest single improvement)
+
+Split into two PRs on delivery because the header path touches ~15 pages.
+
+- **U-4a** Fix `Home.ReloadPage()` — the single non-settings `forceLoad` in the app. `SplitBankTransactionAsync` and `OnCompletedAsync` (statement import) now call a shared `LoadDataAsync()` that re-runs the auto-matcher, re-fetches accounts and booking texts in place, and keeps the SignalR circuit + scoped `RepositoryCache` alive. No cross-cutting scaffolding needed.
+- **U-4b** Persist year and mandator (cookie + URL query params), make `SettingsService` `Scoped`, add an event or `LocationChanged` subscription so every page refreshes on year/mandator change, and drop `MyHeader`'s `forceLoad`. This is the big one — it touches every routable page.
+
+### Phase 3 — Loading and error UX consistency
+
+- **U-5** Shared `<LoadingWhen Data="@x">` component with a consistent skeleton visual. Adopt across every page currently using ad-hoc `@if (x is null) { <p>Lädt…</p> return; }`.
+- **U-6a** Wrap `MainLayout`'s `@Body` in `<ErrorBoundary>` with a friendly retry UI. Reset on any `NavigationManager.LocationChanged` so the error state doesn't stick after the user clicks "Zur Startseite".
+- **U-6b** Route expected `SaveTransactionAsync` / `DeleteAccountAsync` / etc. exceptions to `IMessageService` — try/catch in each of the ~15 event handlers with a shared error-formatting helper.
+
+### Phase 4 — Feedback + polish for mutations
+
+- **U-7** `IToastService.ShowSuccess(...)` after every successful save/delete across Accounts, BookingRules, BookingTexts, Classes, Transactions.
+- **U-8** Format the raw decimal in Transactions' delete confirmation via `ToFormattedString()`, and fix the "Transaction" → "Transaktion" typo. Turned out to be a one-file change — the other four CRUD pages don't put values into confirmations.
+- **U-9** Add `<FluentSearch>` filter to Accounts, BookingRules, BookingTexts, BankTransactions.
+
+### Phase 5 — Home page split
+
+- **U-10** Extract `<StatementImport />` and `<PendingBookings />` components. Home stacks them.
+- **U-11** Replace the Home `<input list="texts">` + `<datalist>` with `FluentAutocomplete` so the autocomplete UI is uniform with the split dialog.
+
+### Phase 6 — Report componentization
+
+- **U-12** Extract `<ReportSection>`, `<ReportAccountRow>`, `<ReportSectionHeader>`, `<ReportTotalRow>`, `<ReportFooter>`. Apply to the four report pages. Shared print CSS + `page-break-inside: avoid` on rows.
+
+### Phase 7 — Nice-to-haves (optional)
+
+- Accessibility: `aria-label` on icon-only buttons, focus management after dialog close, skip-to-content link.
+- Dark mode toggle (Fluent supports theme override).
+- Keyboard: `Ctrl+S` in dialogs, `Del` on selected row in grids.
+- Header format: nicer separator + optional subtitle.
+- `AccountSelector`'s `Autofocus` becomes opt-in.
+
+## What was explicitly *not* flagged
+
+- The `de-CH` culture hardcode. Correct choice for the target user; localizing is a lot of work for zero user value.
+- The `InteractiveServer` render mode. Correct for this app.
+- The Fluent UI dependency.