feat(usability): preserve reporting year and locate outside-period bookings (U04)

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;
     }