[CHANGE] Updated layouts && configured rendermode

ImportUI/Components/Layout/BaseLayout.razor.cs

@@ -0,0 +1,37 @@
+using Microsoft.AspNetCore.Components;
+using MudBlazor;
+
+namespace ImportUI.Components.Layout;
+
+public partial class BaseLayout
+{
+    private readonly MudTheme _mudTheme = new MudTheme();
+    private MudThemeProvider? _themeProvider;
+    private bool _isDarkTheme = true;
+    
+    public event EventHandler<bool>? OnDarkThemeChanged;
+
+    public bool DarkTheme
+    {
+        get => _isDarkTheme;
+        set
+        {
+            _isDarkTheme = value;
+            ThemeChanged();
+        }
+    }
+
+    private void ThemeChanged()
+    {
+        StateHasChanged();
+    }
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender && _themeProvider != null)
+        {
+            DarkTheme = await _themeProvider.GetSystemDarkModeAsync();
+            _themeProvider.IsDarkModeChanged = EventCallback.Factory.Create<bool>(this, x => OnDarkThemeChanged?.Invoke(this, x));
+        }
+    }
+}