docs/usability-umsetzung.md

@@ -27,3 +27,7 @@ Strukturierte Ergebnisse und gemeinsame Statusanzeige mit optionalen technischen
 ## U03 – Gleiche Bedeutung in PDF und Oberfläche
 
 Einzelkonto und Übersicht enthalten nur wirksame Buchungen. Zeitraum und Bedeutung des Endstands sind ausdrücklich benannt, auch bei „Alle Jahre“ mit Anfangsbestand. Im Einzelkonto zählen Umbuchungen als Zu-/Abgang; die Übersicht zeigt beide Konten in einer Zeile und erklärt die unveränderte Vereinssumme. Prüfung: 19/19 Debug-Tests. PDF-Textextraktion prüft 58,30 € Kontostand, 108,30 € Vereinssumme, ausgeschlossene gelöschte/spätere Buchungen und Richtung. Einzelkonto, gemeinsame Übersicht und Seiten 2/3 eines dreiseitigen Auszugs gerendert und visuell auf Lesbarkeit, wiederholte Kopfzeilen und Abschluss geprüft.
+
+## U04 – Jahreskontext
+
+Gemeinsame explizite Jahresauswahl bleibt beim Wechsel Übersicht/Konto/Zurück erhalten, auch „Alle Jahre“. Auswahl enthält aktuelles und gewähltes Jahr auch ohne Buchungen. Liste und Summen benennen den Zeitraum; Leerzustände unterscheiden fehlende Buchungen und leeren Zeitraum. Abweichendes Datum bleibt unverändert, erfordert eine gezielte Bestätigung im Formular und bietet nach Erfolg „Buchung im Jahr … anzeigen“. Prüfung: 21/21 Debug-Tests, einschließlich gerenderter Navigation 2025 → Konto → Zurück, Buchung 2026 bei Filter 2025 und anschließendem Aufruf des gespeicherten Jahres. Dabei bestehende doppelte DbContext-Registrierung korrigiert, da die Singleton-Factory sonst scoped Optionen konsumiert.

src/Duempelkas.App/Components/Accounts/EntryTable.razor

@@ -20,6 +20,6 @@
 
 @if (!Entries.Any())
 {
-    <div class="text-center py-3 text-muted">Keine Buchungen vorhanden.</div>
+    <div class="text-center py-3 text-muted">@EmptyMessage</div>
 }
 

src/Duempelkas.App/Components/Accounts/EntryTable.razor.cs

@@ -5,6 +5,7 @@ namespace Duempelkas.App.Components.Accounts;
 
 public partial class EntryTable
 {
+    [Parameter] public string EmptyMessage { get; set; } = "Keine Buchungen vorhanden.";
     #region Parameters
 
     [Parameter]

src/Duempelkas.App/Components/Dialogs/AddEntryDialog.razor

@@ -24,9 +24,17 @@
             <input type="number" class="form-control no-spinner" @bind="amount" step="0.01" min="0.01" />
         </div>
 
+        @if (OutsideYear)
+        {
+            <div class="alert alert-warning" role="status">
+                Datum @date.ToString("dd.MM.yyyy"): Diese Buchung liegt außerhalb von Jahr @ContextYear und wird dort nicht angezeigt.
+                <label><input type="checkbox" checked="@(confirmDifferentYear && confirmedYear == date.Year)" @onchange="e => { confirmDifferentYear = e.Value is true; confirmedYear = date.Year; }" /> Ich möchte die Buchung im Jahr @date.Year speichern.</label>
+            </div>
+        }
+
         <div class="d-flex justify-content-end gap-2">
             <button class="btn btn-success" @onclick="Save"
-                    disabled="@(string.IsNullOrWhiteSpace(title) || amount <= 0)">
+                    disabled="@(string.IsNullOrWhiteSpace(title) || amount <= 0 || (OutsideYear && (!confirmDifferentYear || confirmedYear != date.Year)))">
                 <i class="bi bi-check-lg"></i> @(EditEntry != null ? "Speichern" : "Hinzufügen")
             </button>
             <button class="btn btn-outline-secondary" @onclick="Cancel"><i class="bi bi-x-lg"></i> Abbrechen</button>

src/Duempelkas.App/Components/Dialogs/AddEntryDialog.razor.cs

@@ -15,13 +15,18 @@ public partial class AddEntryDialog
     public EntryDto? EditEntry { get; set; }
 
     [Parameter]
-    public EventCallback OnSave { get; set; }
+    public EventCallback<DateTime> OnSave { get; set; }
 
     [Parameter]
     public EventCallback OnCancel { get; set; }
 
     #endregion
 
+    [Parameter] public int? ContextYear { get; set; }
+    private bool confirmDifferentYear;
+    private int? confirmedYear;
+    private bool OutsideYear => ContextYear.HasValue && date.Year != ContextYear.Value;
+
     #region Fields
 
     private EntryType entryType = EntryType.Income;
@@ -50,6 +55,7 @@ public partial class AddEntryDialog
 
     private async Task Save()
     {
+        if (OutsideYear && (!confirmDifferentYear || confirmedYear != date.Year)) return;
         if (EditEntry != null)
         {
             await EntryService.UpdateEntryAsync(EditEntry.Id, date, title.Trim(), amount);
@@ -59,7 +65,7 @@ public partial class AddEntryDialog
             await EntryService.CreateEntryAsync(AccountId, entryType, date, title.Trim(), amount);
         }
 
-        await OnSave.InvokeAsync();
+        await OnSave.InvokeAsync(date);
     }
 
     private async Task Cancel() => await OnCancel.InvokeAsync();

src/Duempelkas.App/Components/Dialogs/AddTransferDialog.razor

@@ -25,9 +25,17 @@
             <input type="number" class="form-control no-spinner" @bind="amount" step="0.01" min="0.01" />
         </div>
 
+        @if (OutsideYear)
+        {
+            <div class="alert alert-warning" role="status">
+                Datum @date.ToString("dd.MM.yyyy"): Diese Buchung liegt außerhalb von Jahr @ContextYear und wird dort nicht angezeigt.
+                <label><input type="checkbox" checked="@(confirmDifferentYear && confirmedYear == date.Year)" @onchange="e => { confirmDifferentYear = e.Value is true; confirmedYear = date.Year; }" /> Ich möchte die Buchung im Jahr @date.Year speichern.</label>
+            </div>
+        }
+
         <div class="d-flex justify-content-end gap-2">
             <button class="btn btn-success" @onclick="Save"
-                    disabled="@(!CanSave)"><i class="bi bi-arrow-left-right"></i> @(EditEntry != null ? "Speichern" : "Hinzufügen")</button>
+                    disabled="@(!CanSave || (OutsideYear && (!confirmDifferentYear || confirmedYear != date.Year)))"><i class="bi bi-arrow-left-right"></i> @(EditEntry != null ? "Speichern" : "Hinzufügen")</button>
             <button class="btn btn-outline-secondary" @onclick="Cancel"><i class="bi bi-x-lg"></i> Abbrechen</button>
         </div>
     </div>

src/Duempelkas.App/Components/Dialogs/AddTransferDialog.razor.cs

@@ -14,13 +14,18 @@ public partial class AddTransferDialog
     public EntryDto? EditEntry { get; set; }
 
     [Parameter]
-    public EventCallback OnSave { get; set; }
+    public EventCallback<DateTime> OnSave { get; set; }
 
     [Parameter]
     public EventCallback OnCancel { get; set; }
 
     #endregion
 
+    [Parameter] public int? ContextYear { get; set; }
+    private bool confirmDifferentYear;
+    private int? confirmedYear;
+    private bool OutsideYear => ContextYear.HasValue && date.Year != ContextYear.Value;
+
     #region Fields
 
     private List<AccountSummaryDto> accounts = new();
@@ -61,6 +66,7 @@ public partial class AddTransferDialog
 
     private async Task Save()
     {
+        if (OutsideYear && (!confirmDifferentYear || confirmedYear != date.Year)) return;
         if (EditEntry != null)
         {
             await EntryService.UpdateTransferAsync(EditEntry.Id, targetAccountId, date, title.Trim(), amount);
@@ -70,7 +76,7 @@ public partial class AddTransferDialog
             await EntryService.CreateTransferAsync(SourceAccountId, targetAccountId, date, title.Trim(), amount);
         }
 
-        await OnSave.InvokeAsync();
+        await OnSave.InvokeAsync(date);
     }
 
     private async Task Cancel() => await OnCancel.InvokeAsync();

src/Duempelkas.App/Pages/Accounts/AccountDetail.razor

@@ -1,3 +1,4 @@
+@inject ReportingPeriod Period
 @page "/accounts/{AccountId:int}"
 @inject IAccountService AccountService
 @inject IEntryService EntryService
@@ -10,6 +11,13 @@
     <OperationNotice Result="fileResult" />
     @if (fileBusy) { <p role="status" aria-live="polite">Dateiaktion läuft … Bitte warten.</p> }
 
+    @if (savedOutsideYear.HasValue)
+    {
+        <div class="alert alert-info" role="status">
+            Die Buchung wurde im Jahr @savedOutsideYear gespeichert und liegt außerhalb der aktuellen Ansicht.
+            <button class="btn btn-outline-primary" @onclick="ShowSavedYear">Buchung im Jahr @savedOutsideYear anzeigen</button>
+        </div>
+    }
     @if (account == null)
     {
         <div class="text-center py-5">
@@ -43,10 +51,11 @@
             </button>
             |
             <button class="btn btn-nav btn-primary" @onclick="OpenYearFilterDialog">
-                <i class="bi bi-funnel"></i> Ansicht<br>@GetFilterLabel()
+                <i class="bi bi-funnel"></i> @GetFilterLabel()
             </button>
         </div>
 
+        <p class="text-muted">Zeitraum für Liste und Summen: @Period.Label</p>
         @if (balance != null)
         {
             <div class="summary-section">
@@ -96,7 +105,7 @@
         @if (entries != null)
         {
             <div class="entries-scroll-wrapper">
-                <EntryTable Entries="entries" OnDeleteEntry="RequestDeleteEntry" OnRestoreEntry="RequestRestoreEntry" OnEditEntry="RequestEditEntry" />
+                <EntryTable Entries="entries" EmptyMessage="emptyEntriesMessage" OnDeleteEntry="RequestDeleteEntry" OnRestoreEntry="RequestRestoreEntry" OnEditEntry="RequestEditEntry" />
             </div>
         }
     }
@@ -104,14 +113,14 @@
 
 @if (showAddEntry)
 {
-    <AddEntryDialog AccountId="AccountId"
+    <AddEntryDialog AccountId="AccountId" ContextYear="selectedYear"
                     OnSave="HandleEntryCreated"
                     OnCancel="() => showAddEntry = false" />
 }
 
 @if (showAddTransfer)
 {
-    <AddTransferDialog SourceAccountId="AccountId"
+    <AddTransferDialog SourceAccountId="AccountId" ContextYear="selectedYear"
                        OnSave="HandleTransferCreated"
                        OnCancel="() => showAddTransfer = false" />
 }
@@ -168,7 +177,7 @@
 
 @if (editingEntry != null)
 {
-    <AddEntryDialog AccountId="AccountId"
+    <AddEntryDialog AccountId="AccountId" ContextYear="selectedYear"
                     EditEntry="editingEntry"
                     OnSave="HandleEntryEdited"
                     OnCancel="() => editingEntry = null" />
@@ -176,7 +185,7 @@
 
 @if (editingTransferEntry != null)
 {
-    <AddTransferDialog SourceAccountId="AccountId"
+    <AddTransferDialog SourceAccountId="AccountId" ContextYear="selectedYear"
                        EditEntry="editingTransferEntry"
                        OnSave="HandleEntryEdited"
                        OnCancel="() => editingTransferEntry = null" />

src/Duempelkas.App/Pages/Accounts/AccountDetail.razor.cs

@@ -22,7 +22,7 @@ public partial class AccountDetail
     private bool showEditName;
     private bool showEditCarryover;
     private bool showYearFilterDialog;
-    private int? selectedYear = DateTime.Now.Year;
+    private int? selectedYear { get => Period.Year; set => Period.Year = value; }
     private List<int> availableYears = [];
 
     private int? confirmDeleteEntryId;
@@ -35,6 +35,8 @@ public partial class AccountDetail
     private FileOperationResult? fileResult;
     private bool fileBusy;
 
+    private int? savedOutsideYear;
+    private string emptyEntriesMessage = "Noch keine Buchungen vorhanden.";
     private EntryDto? editingEntry;
     private EntryDto? editingTransferEntry;
 
@@ -62,7 +64,9 @@ public partial class AccountDetail
         account = await AccountService.GetAccountAsync(AccountId);
         balance = await BalanceQueryService.GetAccountBalanceAsync(AccountId, selectedYear);
         entries = await EntryService.GetEntriesAsync(AccountId, selectedYear);
-        availableYears = await EntryService.GetEntryYearsAsync(AccountId);
+        var entryYears = await EntryService.GetEntryYearsAsync(AccountId);
+        availableYears = Period.Choices(entryYears);
+        emptyEntriesMessage = entryYears.Count == 0 ? "Noch keine Buchungen vorhanden." : "Keine Buchungen in diesem Zeitraum. Wähle ein anderes Jahr oder Alle Jahre.";
     }
 
     private void OpenYearFilterDialog()
@@ -78,6 +82,7 @@ public partial class AccountDetail
     private async Task SelectFilterYear(int? year)
     {
         selectedYear = year;
+        savedOutsideYear = null;
         showYearFilterDialog = false;
         await LoadAll();
     }
@@ -100,18 +105,22 @@ public partial class AccountDetail
         await LoadAll();
     }
 
-    private async Task HandleEntryCreated()
+    private async Task HandleEntryCreated(DateTime savedDate)
     {
+        savedOutsideYear = selectedYear.HasValue && selectedYear.Value != savedDate.Year ? savedDate.Year : null;
         showAddEntry = false;
         await LoadAll();
     }
 
-    private async Task HandleTransferCreated()
+    private async Task HandleTransferCreated(DateTime savedDate)
     {
+        savedOutsideYear = selectedYear.HasValue && selectedYear.Value != savedDate.Year ? savedDate.Year : null;
         showAddTransfer = false;
         await LoadAll();
     }
 
+    private Task ShowSavedYear() => SelectFilterYear(savedOutsideYear);
+
     private void RequestDeleteEntry(int entryId)
     {
         confirmDeleteEntryId = entryId;
@@ -171,8 +180,9 @@ public partial class AccountDetail
         }
     }
 
-    private async Task HandleEntryEdited()
+    private async Task HandleEntryEdited(DateTime savedDate)
     {
+        savedOutsideYear = selectedYear.HasValue && selectedYear.Value != savedDate.Year ? savedDate.Year : null;
         editingEntry = null;
         editingTransferEntry = null;
         await LoadAll();
@@ -226,7 +236,7 @@ public partial class AccountDetail
 
     private static string FormatAmount(decimal amount) => $"{amount:N2} €";
 
-    private string GetFilterLabel() => selectedYear?.ToString() ?? "Alle";
+    private string GetFilterLabel() => Period.Label;
 
     #endregion
 }

src/Duempelkas.App/Pages/Dashboard.razor

@@ -1,3 +1,4 @@
+@inject ReportingPeriod Period
 @page "/"
 @inject IAccountService AccountService
 @inject IBackupService BackupService
@@ -40,7 +41,7 @@
         </button>
         |
         <button class="btn btn-nav btn-primary" @onclick="OpenYearFilterDialog">
-            <i class="bi bi-funnel"></i> Ansicht<br>@GetFilterLabel()
+            <i class="bi bi-funnel"></i> @GetFilterLabel()
         </button>
         <button class="btn btn-nav btn-secondary" @onclick="ToggleThemeAsync" title="Farbmodus wechseln">
             <i class="@ThemeButtonIconClass"></i> Modus<br>@ThemeButtonLabel
@@ -50,7 +51,7 @@
     @if (accounts != null && accounts.Any())
     {
         <div class="alert alert-secondary py-2 px-3 mb-3" role="status">
-            <strong>Summe aller Konten:</strong>
+            <strong>Summe aller Konten – @Period.Label:</strong>
             <span class="ms-2 @(TotalClubBalance >= 0 ? "text-success" : "text-danger")">
                 @FormatCurrency(TotalClubBalance)
             </span>

src/Duempelkas.App/Pages/Dashboard.razor.cs

@@ -14,7 +14,7 @@ public partial class Dashboard
     private bool showEditClubName;
     private bool showRestoreConfirm;
     private bool showYearFilterDialog;
-    private int? selectedYear = DateTime.Now.Year;
+    private int? selectedYear { get => Period.Year; set => Period.Year = value; }
     private List<int> availableYears = [];
     private string clubName = string.Empty;
     private string? savedPdfPath;
@@ -67,7 +67,7 @@ public partial class Dashboard
     private async Task LoadAll()
     {
         await LoadAccounts();
-        availableYears = await EntryService.GetAllEntryYearsAsync();
+        availableYears = Period.Choices(await EntryService.GetAllEntryYearsAsync());
     }
 
     private async Task LoadAccounts()
@@ -207,7 +207,7 @@ public partial class Dashboard
         return amount.ToString("N2", CultureInfo.GetCultureInfo("de-DE")) + " €";
     }
 
-    private string GetFilterLabel() => selectedYear?.ToString() ?? "Alle";
+    private string GetFilterLabel() => Period.Label;
 
     private string ThemeButtonLabel => currentTheme == "dark" ? "Hell" : "Dunkel";
 

src/Duempelkas.App/Services/ReportingPeriod.cs

@@ -0,0 +1,11 @@
+namespace Duempelkas.App.Services;
+
+/// <summary>The user's explicit selection survives navigation, including All years.</summary>
+public sealed class ReportingPeriod
+{
+    public int? Year { get; set; } = DateTime.Today.Year;
+    public string Label => Year.HasValue ? $"Jahr: {Year}" : "Alle Jahre";
+    public List<int> Choices(IEnumerable<int> entryYears) => entryYears
+        .Append(DateTime.Today.Year).Concat(Year.HasValue ? [Year.Value] : Array.Empty<int>())
+        .Distinct().OrderDescending().ToList();
+}

src/Duempelkas.Infrastructure/DependencyInjection.cs

@@ -11,8 +11,8 @@ public static class DependencyInjection
     public static IServiceCollection AddInfrastructure(this IServiceCollection services, string connectionString)
     {
         services.AddSingleton(new DatabaseLocation(connectionString));
-        services.AddDbContext<FinanceDbContext>(options =>
-            options.UseSqlite(connectionString));
+        // The factory also registers FinanceDbContext as scoped. Registering
+        // AddDbContext first would give its singleton factory scoped options.
         services.AddDbContextFactory<FinanceDbContext>(options =>
             options.UseSqlite(connectionString));
 
@@ -24,6 +24,7 @@ public static class DependencyInjection
         services.AddScoped<IFileSaveService, FileSaveService>();
         services.AddSingleton<IBackupService, BackupService>();
         services.AddSingleton<ISettingsService, SettingsService>();
+        services.AddSingleton<ReportingPeriod>();
 
         return services;
     }

tests/Duempelkas.Tests/Duempelkas.Tests.csproj

@@ -8,6 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="bunit" Version="2.13.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.11.0" />
     <PackageReference Include="PdfPig" Version="0.1.16" />
     <PackageReference Include="xunit" Version="2.9.3" />

tests/Duempelkas.Tests/ReportingPeriodTests.cs

@@ -0,0 +1,19 @@
+using Duempelkas.App.Services;
+using Xunit;
+
+namespace Duempelkas.Tests;
+
+public class ReportingPeriodTests
+{
+    [Fact]
+    public void EmptyYearList_PreservesSelectedYear_AndOffersCurrentYear()
+    {
+        var period = new ReportingPeriod { Year = 2025 };
+        Assert.Contains(2025, period.Choices([]));
+        Assert.Contains(DateTime.Today.Year, period.Choices([]));
+        Assert.Equal("Jahr: 2025", period.Label);
+        period.Year = null;
+        Assert.Equal("Alle Jahre", period.Label);
+        Assert.Null(period.Year);
+    }
+}

tests/Duempelkas.Tests/YearNavigationTests.cs

@@ -0,0 +1,58 @@
+using Bunit;
+using Duempelkas.App.Components;
+using Duempelkas.App.Components.Dialogs;
+using Duempelkas.App.Services;
+using Duempelkas.Domain.Enums;
+using Duempelkas.Infrastructure;
+using Duempelkas.Infrastructure.Persistence;
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using Xunit;
+
+namespace Duempelkas.Tests;
+
+public class YearNavigationTests
+{
+    [Fact]
+    public async Task Navigation_PreservesYear_AndOutsideBookingOffersReturn()
+    {
+        using var context = new BunitContext();
+        var connectionString = $"Data Source=year-ui-{Guid.NewGuid():N};Mode=Memory;Cache=Shared";
+        using var anchor = new SqliteConnection(connectionString);
+        anchor.Open();
+        context.Services.AddInfrastructure(connectionString);
+        context.JSInterop.Mode = JSRuntimeMode.Loose;
+        using (var db = context.Services.GetRequiredService<IDbContextFactory<FinanceDbContext>>().CreateDbContext())
+        {
+            db.Database.EnsureCreated();
+            db.Accounts.Add(new() { Name = "Testkasse" });
+            db.SaveChanges();
+            await context.Services.GetRequiredService<IEntryService>().CreateEntryAsync(db.Accounts.Single().Id,
+                EntryType.Income, new(2025, 1, 1), "Vorjahr", 10m);
+        }
+        context.Services.GetRequiredService<ReportingPeriod>().Year = 2025;
+        var page = context.Render<Routes>();
+        page.WaitForAssertion(() => Assert.Contains("Jahr: 2025", page.Markup));
+        page.Find(".account-card").Click();
+        page.WaitForAssertion(() => Assert.Contains("Vorjahr", page.Markup));
+        page.FindAll("button").Single(b => b.TextContent.Contains("Zurück")).Click();
+        page.WaitForAssertion(() => Assert.Contains("Jahr: 2025", page.Markup));
+        page.Find(".account-card").Click();
+        page.WaitForElement(".summary-section");
+        page.FindAll("button").Single(b => b.TextContent.Trim() == "Buchung").Click();
+        var dialog = page.FindComponent<AddEntryDialog>();
+        dialog.Find("input[type=date]").Change("2026-01-02");
+        dialog.Find("input[type=text]").Change("Außerhalb");
+        dialog.Find("input[type=number]").Change("12.50");
+        Assert.Contains("außerhalb", dialog.Markup);
+        Assert.True(dialog.Find("button.btn-success").HasAttribute("disabled"));
+        dialog.Find("input[type=checkbox]").Change(true);
+        dialog.Find("button.btn-success").Click();
+        page.WaitForAssertion(() => Assert.Contains("Buchung im Jahr 2026 anzeigen", page.Markup));
+        Assert.DoesNotContain("Außerhalb", page.Find("table").TextContent);
+        page.FindAll("button").Single(b => b.TextContent.Contains("Buchung im Jahr 2026 anzeigen")).Click();
+        page.WaitForAssertion(() => Assert.Contains("Außerhalb", page.Find("table").TextContent));
+        Assert.Equal(2026, context.Services.GetRequiredService<ReportingPeriod>().Year);
+    }
+}