Auth integration

Components/Layout/NavMenu.razor

@@ -7,6 +7,11 @@
     <MudNavLink Href="urlaub-maximizer" Icon="@Icons.Material.Filled.AutoAwesome">Urlaubs-Maximizer</MudNavLink>
     <MudNavLink Href="settings" Icon="@Icons.Material.Filled.Settings">Einstellungen</MudNavLink>
     <MudDivider Class="mt-2 mb-2" />
+    <AuthorizeView Policy="AdminOnly">
+        <MudNavLink Href="admin/users" Icon="@Icons.Material.Filled.AdminPanelSettings" IconColor="Color.Error">
+            Benutzerverwaltung
+        </MudNavLink>
+    </AuthorizeView>
     <AuthorizeView>
         <Authorized>
             <MudStack Row="true" AlignItems="AlignItems.Center" Class="px-4 py-1" Spacing="1">

Components/Pages/AdminUsers.razor

@@ -0,0 +1,103 @@
+@page "/admin/users"
+@rendermode InteractiveServer
+@attribute [Authorize(Policy = "AdminOnly")]
+@inject AuthService AuthService
+@inject ISnackbar Snackbar
+@inject AuthenticationStateProvider AuthStateProvider
+
+<PageTitle>Benutzerverwaltung – Timetracker</PageTitle>
+
+@if (_loading)
+{
+    <MudStack AlignItems="AlignItems.Center" Class="mt-16" Spacing="3">
+        <MudProgressCircular Color="Color.Primary" Indeterminate="true" Size="Size.Large" />
+        <MudText Color="Color.Secondary">Lade Benutzer…</MudText>
+    </MudStack>
+}
+else
+{
+    <MudStack Spacing="4">
+
+        @* ── Header ── *@
+        <MudPaper Elevation="4" Class="pa-5 rounded-xl"
+                  Style="background: linear-gradient(135deg, #B71C1C 0%, #7F0000 100%); color:white;">
+            <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="3">
+                <MudIcon Icon="@Icons.Material.Filled.AdminPanelSettings" Style="color:white; font-size:2rem" />
+                <MudStack Spacing="0">
+                    <MudText Typo="Typo.h5" Style="color:white; font-weight:700">Benutzerverwaltung</MudText>
+                    <MudText Typo="Typo.caption" Style="color:rgba(255,255,255,0.72)">
+                        @_users.Count Benutzer registriert
+                    </MudText>
+                </MudStack>
+            </MudStack>
+        </MudPaper>
+
+        @* ── Tabelle ── *@
+        <MudCard Elevation="3" Class="rounded-xl">
+            <MudCardContent Class="pa-0">
+                <MudTable Items="_users" Hover="true" Striped="true" Dense="false"
+                          SortLabel="Sortieren">
+                    <HeaderContent>
+                        <MudTh><MudTableSortLabel SortBy="new Func<User, object>(u => u.Id)">ID</MudTableSortLabel></MudTh>
+                        <MudTh><MudTableSortLabel SortBy="new Func<User, object>(u => u.Username)" InitialDirection="SortDirection.Ascending">Benutzername</MudTableSortLabel></MudTh>
+                        <MudTh Style="text-align:right">Aktionen</MudTh>
+                    </HeaderContent>
+                    <RowTemplate>
+                        <MudTd>
+                            <MudText Typo="Typo.body2" Color="Color.Secondary">@context.Id</MudText>
+                        </MudTd>
+                        <MudTd>
+                            <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2">
+                                <MudIcon Icon="@Icons.Material.Filled.AccountCircle"
+                                         Color="@(context.Username == "marc" ? Color.Error : Color.Default)"
+                                         Size="Size.Small" />
+                                <MudText Style="@(context.Username == "marc" ? "font-weight:700" : "")">
+                                    @context.Username
+                                </MudText>
+                                @if (context.Username == "marc")
+                                {
+                                    <MudChip T="string" Size="Size.Small" Color="Color.Error" Variant="Variant.Outlined">Admin</MudChip>
+                                }
+                            </MudStack>
+                        </MudTd>
+                        <MudTd Style="text-align:right">
+                            @if (context.Username != "marc")
+                            {
+                                <MudIconButton Icon="@Icons.Material.Filled.DeleteOutline"
+                                               Color="Color.Error"
+                                               Size="Size.Small"
+                                               OnClick="@(() => DeleteUser(context))" />
+                            }
+                        </MudTd>
+                    </RowTemplate>
+                    <NoRecordsContent>
+                        <MudText Color="Color.Secondary" Class="pa-4">Keine Benutzer gefunden.</MudText>
+                    </NoRecordsContent>
+                </MudTable>
+            </MudCardContent>
+        </MudCard>
+
+    </MudStack>
+}
+
+@code {
+    private List<User> _users = [];
+    private bool _loading = true;
+
+    protected override async Task OnInitializedAsync()
+    {
+        var claim = (await AuthStateProvider.GetAuthenticationStateAsync())
+            .User.FindFirst(ClaimTypes.NameIdentifier);
+        if (claim == null) return;
+
+        _users = await AuthService.GetAllUsersAsync();
+        _loading = false;
+    }
+
+    private async Task DeleteUser(User user)
+    {
+        await AuthService.DeleteUserAsync(user.Id);
+        _users.Remove(user);
+        Snackbar.Add($"Benutzer \"{user.Username}\" gelöscht.", Severity.Info);
+    }
+}