fix(select): select value(s) provided in @bind-Value(s) after async initialization

src/LumexUI/Components/Select/Internal/ItemsCollectedNotifier.cs

@@ -0,0 +1,53 @@
+// Copyright (c) LumexUI 2024
+// LumexUI licenses this file to you under the MIT license
+// See the license here https://github.com/LumexUI/lumexui/blob/main/LICENSE
+
+using System.ComponentModel;
+
+using Microsoft.AspNetCore.Components;
+
+using IComponent = Microsoft.AspNetCore.Components.IComponent;
+
+namespace LumexUI.Internal;
+
+/// <summary>
+/// For internal use only.
+/// </summary>
+[EditorBrowsable( EditorBrowsableState.Never )]
+public sealed class ItemsCollectedNotifier<TValue> : IComponent
+{
+	[CascadingParameter] private SelectContext<TValue> Context { get; set; } = default!;
+
+	private LumexSelect<TValue> Select => Context.Owner;
+
+	private bool _isFirstRender = true;
+
+	void IComponent.Attach( RenderHandle renderHandle )
+	{
+		// This component never renders, so we can ignore the renderHandle
+	}
+
+	Task IComponent.SetParametersAsync( ParameterView parameters )
+	{
+		if( _isFirstRender )
+		{
+			parameters.SetParameterProperties( this );
+
+			if( Context.IsMultipleSelect )
+			{
+				Context.UpdateSelectedItems( Select.Values );
+			}
+			else
+			{
+				Context.UpdateSelectedItem( Select.Value );
+			}
+
+			_isFirstRender = false;
+			return Task.CompletedTask;
+		}
+		else
+		{
+			return Task.CompletedTask;
+		}
+	}
+}

src/LumexUI/Components/Select/LumexSelect.razor

@@ -13,7 +13,7 @@
         @{
             _context.FinishCollectingItems();
         }
-        <_ItemsCollectedNotifier TValue="TValue" />
+        <ItemsCollectedNotifier TValue="TValue" />
 
         <div class="@_slots.Base"
              style="@RootStyle"
@@ -95,7 +95,7 @@
                       @ref="@_popoverRef"
                       @bind-Open="@_isOpen">
             <LumexPopoverContent>
-                @if( _context.IsMultiSelect )
+                @if( _context.IsMultipleSelect )
                 {
                     <LumexListbox TValue="TValue"
                                   Values="@CurrentValues"