Made Navbar working and began to adapted Global Entitys List Page

CouchLog/Components/Layout/MainLayout.razor

@@ -1,9 +1,10 @@
 @inherits LayoutComponentBase
 @using MudBlazor
 
-<MudThemeProvider />
+<MudThemeProvider @bind-IsDarkMode="@_isDarkMode" />
 <MudDialogProvider />
 <MudSnackbarProvider />
+<MudPopoverProvider />
 
 <MudLayout>
     <MudAppBar Color="Color.Primary" Fixed="true">
@@ -12,7 +13,7 @@
     </MudAppBar>
 
     <MudDrawer @bind-Open="@_drawerOpen" ClipMode="DrawerClipMode.Always" Elevation="1">
-        <NavMenu /> @* Ihr NavMenu.razor müssen Sie später auch auf MudNavMenu umbauen *@
+        <NavMenu />
     </MudDrawer>
 
     <MudMainContent>
@@ -30,9 +31,10 @@
 
 @code {
     bool _drawerOpen = true;
+    bool _isDarkMode = true;
 
     void DrawerToggle()
     {
         _drawerOpen = !_drawerOpen;
     }
-}
+}