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

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>