Add unit tests for DashboardPdfStatementService to validate PDF generation with entries and transfers

src/Duempelkas.App/Pages/Dashboard.razor

@@ -2,8 +2,11 @@
 @inject IAccountService AccountService
 @inject IBackupService BackupService
 @inject ISettingsService SettingsService
+@inject IPdfStatementService PdfStatementService
+@inject IFileSaveService FileSaveService
 @inject IJSRuntime JsRuntime
 @inject NavigationManager NavigationManager
+@using System.Globalization
 
 <div class="container-fluid">
 
@@ -29,8 +32,22 @@
         <button class="btn-nav btn-warning" @onclick="HandleRestoreAsync">
             <i class="bi bi-arrow-counterclockwise"></i> Restore
         </button>
+        |
+        <button class="btn-nav btn-dark" @onclick="HandleDashboardExportAsync">
+            <i class="bi bi-file-earmark-pdf"></i> PDF
+        </button>
     </div>
 
+    @if (accounts != null && accounts.Any())
+    {
+        <div class="alert alert-secondary py-2 px-3 mb-3" role="status">
+            <strong>Summe aller Konten:</strong>
+            <span class="ms-2 @(TotalClubBalance >= 0 ? "text-success" : "text-danger")">
+                @FormatCurrency(TotalClubBalance)
+            </span>
+        </div>
+    }
+
     @if (!string.IsNullOrWhiteSpace(operationMessage))
     {
         <div class="alert @operationMessageClass mb-3" role="alert">
@@ -68,6 +85,18 @@
                     OnSave="HandleSaveClubName" OnCancel="() => showEditClubName = false" />
 }
 
+@if (!string.IsNullOrWhiteSpace(savedPdfPath))
+{
+    <ConfirmDialog Title="PDF öffnen"
+                   Message="Die PDF wurde gespeichert. Möchten Sie sie jetzt öffnen?"
+                   ConfirmText="Ja, öffnen"
+                   CancelText="Nein"
+                   ConfirmButtonClass="btn btn-primary"
+                   ConfirmIconClass="bi bi-box-arrow-up-right"
+                   OnConfirm="HandleOpenSavedPdf"
+                   OnCancel="CancelOpenSavedPdf" />
+}
+
 @code {
     private List<AccountSummaryDto>? accounts;
     private bool showAddAccount;
@@ -75,7 +104,9 @@
     private string clubName = string.Empty;
     private string? operationMessage;
     private string operationMessageClass = "alert-info";
+    private string? savedPdfPath;
     private string DisplayClubName => string.IsNullOrWhiteSpace(clubName) ? "Mein Verein" : clubName;
+    private decimal TotalClubBalance => accounts?.Sum(a => a.TotalBalance) ?? 0m;
 
     protected override async Task OnInitializedAsync()
     {
@@ -136,9 +167,35 @@
 
     }
 
+    private async Task HandleDashboardExportAsync()
+    {
+        var pdf = await PdfStatementService.GenerateDashboardStatementAsync();
+        savedPdfPath = await FileSaveService.SaveFileAsync(pdf, $"{DisplayClubName}_Übersicht.pdf");
+    }
+
+    private async Task HandleOpenSavedPdf()
+    {
+        if (!string.IsNullOrWhiteSpace(savedPdfPath))
+        {
+            await FileSaveService.OpenFileAsync(savedPdfPath);
+        }
+
+        savedPdfPath = null;
+    }
+
+    private void CancelOpenSavedPdf()
+    {
+        savedPdfPath = null;
+    }
+
     private void SetOperationMessage(string message, bool success)
     {
         operationMessage = message;
         operationMessageClass = success ? "alert-success" : "alert-danger";
     }
+
+    private static string FormatCurrency(decimal amount)
+    {
+        return amount.ToString("N2", CultureInfo.GetCultureInfo("de-DE")) + " €";
+    }
 }

src/Duempelkas.App/Services/IPdfStatementService.cs

@@ -3,4 +3,5 @@ namespace Duempelkas.App.Services;
 public interface IPdfStatementService
 {
     Task<byte[]> GenerateStatementAsync(int accountId, bool currentYearOnly);
+    Task<byte[]> GenerateDashboardStatementAsync();
 }