[Stateful: Home page] Incorrect announcement when decreasing number of days

[L1nBra]

Description Elements have to be properly defined in order for the users to be able to interact with them and clearly understand what is happening while interacting with them.

Preconditions Stateful Home page (Overview) is opened. Use Screen Reader (NVDA).

Steps to reproduce

1.Navigate to New button while using only keyboard by pressing Tab key. 2.Press Enter. 3.Navigate while pressing Tab key to days input field. 4.Press down arrow key.

UI element

NVDA Speech Viewer

Actual Result

• Screen reader announces: "59 59 unselected"

Expected Result

• When decreasing the value of the field with keyboard it should be announced properly (either only the number 59 or decreased to 59).

Meta Issue

Kibana Version: 8.16.0-SNAPSHOT

OS: Windows 11 Pro

Browser: Chrome Version 129.0.6668.70 (Official Build) (64-bit)

Screen reader: NVDA

WCAG or Vendor Guidance (optional)

• Understanding SC 4.1.2: Name, Role, Value (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/focus-order.html)

Relevant ARIA spec: Spinbutton Pattern(https://www.w3.org/WAI/ARIA/apg/patterns/spinbutton/)

Related to: https://github.com/elastic/search-team/issues/8256

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)