Missing Form Label and Current Selection in the LLM Menu

[derekjackson-das]

Issue:
The button label dynamically changes based on the current LLM selected. The control name should be consistent to understand the purpose, while the value of the selection may change. Additionally, the LLM menu lacks an indication of the currently selected option within the list. This can cause confusion for users relying on assistive technologies, as the focus and selection state are not clear and the name of the control is not persistent.

WCAG Criteria:
1.3.1 Info and Relationships - A

Screenshot or Screen Recording:
View Recording

Note:
The UI should be replaced with a more accessible pattern, such as the APG Combobox pattern. Additionally, the AriaKit Select with custom closely resembles this pattern and could serve as a replacement.