Daybreak/Daybreak.Core/Views/Components/NavigationMenu.razor

<div class="navigation-panel @(this.IsNavigationOpen ? "open" : "") backdrop-panel">
    <div class="navigation-menu">
        <div class="menu-content">
            @foreach (var category in this.MenuCategories)
            {
                <div class="menu-category">
                    <div class="category-header" @onclick="() => this.ToggleCategory(category.Name)">
                        <span class="category-title">@category.Name</span>
                        <span class="category-arrow @(this.expandedCategories.Contains(category.Name) ? "expanded" : "")">⏷</span>
                    </div>

                    @if (this.expandedCategories.Contains(category.Name))
                    {
                        <div class="category-items">
                            @foreach (var button in category.Buttons)
                            {
                                <div class="menu-item" @onclick="() => this.ExecuteAction(button)">
                                    <span class="item-title">@button.Name</span>
                                    <span class="item-description">@button.Hint</span>
                                </div>
                            }
                        </div>
                    }
                </div>
            }
        </div>
    </div>
</div>

@code {
    private HashSet<string> expandedCategories = new();

    [Parameter]
    public required Action<MenuButton> MenuButtonHandler { get; init; }

    [Parameter]
    public required List<MenuCategory> MenuCategories { get; init; }

    [Parameter]
    public required bool IsNavigationOpen { get; init; }

    private void ToggleCategory(string categoryName)
    {
        if (this.expandedCategories.Contains(categoryName))
        {
            this.expandedCategories.Remove(categoryName);
        }
        else
        {
            this.expandedCategories.Add(categoryName);
        }
    }

    private void ExecuteAction(MenuButton button)
    {
        this.MenuButtonHandler?.Invoke(button);
    }
}