[combobox] Closed-trigger typeahead selects disabled items

[lyzno1]

Current behavior

Typing on a closed Combobox trigger can select a disabled item and call onValueChange with its value.

Expected behavior

Skip disabled items and select the next enabled match. If no enabled item matches, leave the value unchanged.

Reproducible example

StackBlitz reproduction

1. Leave the popup closed with Banana selected.
2. Use Tab to focus the trigger.
3. Press a.

Apple is selected even though its Combobox.Item is disabled. Apricot is enabled and should be selected instead.

Base UI version

The reproduction uses @base-ui/react: latest. Also reproduced locally on master at 52c38143e (1.8.0).

Environment

Chromium on macOS; no assistive technology.

Additional context

ComboboxTrigger commits the typeahead match directly without filtering disabled items, bypassing the item's click guard.

[sai6855]

@lyzno1 I can't reproduce the issue based on your reproduction steps. This is state of UI after your step 3. I don't see Apple being selected

[lyzno1]

@sai6855 The popup is open in your screenshot. Please close it, focus the trigger with Tab, then press a.