Tiptap RTE: A11Y label improvements

[leekelleher]

Description

Adds labels to various actions, buttons and menus in the Tiptap RTE and associated property-editors (for toolbar, statusbar, etc).

[Copilot]

Pull Request Overview

This PR enhances accessibility by adding label attributes to inputs, buttons, and selects across the Tiptap RTE toolbar, statusbar, menu components, and the overlay-size editor.

• Adds label to the filter input and toolbar buttons in the toolbar configuration.
• Mirrors these changes in the statusbar configuration.
• Updates the toolbar menu and button elements to bind labels directly.
• Introduces a label on the overlay-size select component.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/.../tiptap/property-editors/.../toolbar-configuration.element.ts	Added label attributes to filter input and toolbar item buttons.
src/.../tiptap/property-editors/.../statusbar-configuration.element.ts	Added label attributes to filter input and statusbar item buttons.
src/.../tiptap/components/toolbar/tiptap-toolbar-menu.element.ts	Removed ifDefined and bound label directly on menu buttons.
src/.../tiptap/components/toolbar/tiptap-toolbar-button.element.ts	Removed ifDefined and replaced with a direct label binding.
src/.../overlay-size/property-editor-ui-overlay-size.element.ts	Added a label to the overlay-size <uui-select>.

Comments suppressed due to low confidence (2)

src/Umbraco.Web.UI.Client/src/packages/tiptap/components/toolbar/tiptap-toolbar-menu.element.ts:7

• Removing ifDefined may cause the label attribute to render as "undefined" when its value is missing. Consider using ifDefined(label) or providing a default string to avoid invalid attribute values.

import { css, customElement, html, state, when } from '@umbraco-cms/backoffice/external/lit';

src/Umbraco.Web.UI.Client/src/packages/tiptap/components/toolbar/tiptap-toolbar-button.element.ts:46

• The variable label is not defined here after replacing ifDefined. You should either declare const label = this.manifest?.meta.label or revert to using this.manifest?.meta.label wrapped with ifDefined to prevent a ReferenceError.

label=${label}