Expose onBlur on Select (and Dropdown) to improve form library integration

[acd02]

Description

Summary:

Select currently exposes onValueChange but not onBlur.

Many form libraries (React Hook Form, TanStack Form, etc.) rely on onBlur to mark fields as touched and trigger validation. Without it, we have to attach someConfig.onBlur on a nested subcomponent (Select.Items), which is not ideal.

Current behavior:

// We can only pass onBlur to a sub-element:

<Select onValueChange={field.onChange}>
  ...
  <Select.Items onBlur={field.onBlur} />
</Select>

Desired behavior:

// Allow handling both value and blur at the same level:

<Select onValueChange={field.onChange} onBlur={field.onBlur}>
  ...
  <Select.Items />
</Select>

Why this matters:

• Form libs expect onBlur to be available at the component boundary to track touched state and trigger validation.
• Improves DX by keeping all field wiring in one place.

Problem Statement/Justification

N/A

Proposed Solution or API

N/A

Alternatives

No response

Additional Information

No response