The Select component had dropdown toggle functionality with _isOpen state management, but the refactoring intent was to always display all options as a simple list selector.

Changes

• Removed dropdown toggle logic: Deleted _isOpen field, ToggleDropdownAsync(), EnsureOpen(), and IsToggleKey() methods
• Simplified keyboard handling: Removed space/toggle key handling; Enter commits selection, Escape resets highlight to current value
• Cleaned up navigation: TryMoveSelection() and TryTypeAhead() no longer return "opened" state since options are always visible
• Removed click-to-toggle: Removed @onclick handler from container div

The component now behaves as a permanently visible list where arrow keys navigate, Enter selects, and Escape cancels.

<Select Options="@(new[] { "Align", "Border", "Columns", "Panel", "Select", "Text Input" })"
        @bind-Value="Select"
        Expand="true" />

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