feat(SelectTree): add CanExpandWhenDisabled parameter

src/BootstrapBlazor/Components/Select/SelectTree.razor

@@ -23,6 +23,7 @@
         <TreeView TItem="TValue" Items="@Items" ShowIcon="ShowIcon"
                   OnTreeItemClick="OnItemClick" ModelEqualityComparer="@ModelEqualityComparer"
                   ShowSearch="ShowSearch" ShowResetSearchButton="ShowResetSearchButton"
+                  CanExpandWhenDisabled="CanExpandWhenDisabled"
                   CustomKeyAttribute="@CustomKeyAttribute" OnExpandNodeAsync="@OnExpandNodeAsync" />
     </div>
     @if (!IsPopover)

src/BootstrapBlazor/Components/Select/SelectTree.razor.cs

@@ -51,6 +51,12 @@ public partial class SelectTree<TValue> : IModelEqualityComparer<TValue>
     [Parameter]
     public string? PlaceHolder { get; set; }
 
+    /// <summary>
+    /// Gets or sets whether nodes can be expanded or collapsed when the component is disabled. Default is false.
+    /// </summary>
+    [Parameter]
+    public bool CanExpandWhenDisabled { get; set; } = false;
+
     /// <summary>
     /// 获得/设置 字符串比较规则 默认 StringComparison.OrdinalIgnoreCase 大小写不敏感 
     /// </summary>

test/UnitTest/Components/SelectTreeTest.cs

@@ -12,6 +12,7 @@ public void Items_Ok()
     {
         var cut = Context.RenderComponent<SelectTree<string>>(builder =>
         {
+            builder.Add(a => a.CanExpandWhenDisabled, false);
             builder.Add(p => p.ShowIcon, true);
             builder.Add(p => p.ModelEqualityComparer, (s1, s2) => { return true; });
             builder.Add(p => p.OnExpandNodeAsync, (s) => { return Task.FromResult(new List<TreeViewItem<string>>().AsEnumerable()); });