fix(morfo,soma,eidos): el caption-button suelta aria-pressed cuando es disparador de MENU

Dentro del CaptionFloat el click abre la lista (la costura anula el toggle) y
el mismo elemento gana aria-haspopup/aria-expanded del DropdownMenu — pero el
morfo le estampaba aria-pressed incondicional: un elemento anunciandose como
toggle pulsado Y boton de menu a la vez, con lo pulsado describiendo un
control que ese click ya no ejerce.

Firmada la (b) de las tres opciones del handoff: condicion declarada en el
morfo (prop-falsy menuTrigger — el patron fieldLabelled, morfo.md Step 4), el
provider publica la fuente por parte y el CaptionFloat pasa menuTrigger. Las
alternativas: (a) shipear el anuncio contradictorio en el buque insignia; (c)
una parte 26 que contradice la doctrina escrita de la propia composicion («the
trigger stays the real CaptionButton») y engorda el morfo mayor del catalogo.

aria-keyshortcuts 'c' se queda: la tecla alterna los subtitulos desde
cualquier foco, el anuncio es verdad. pip/fullscreen no se tocan — nadie los
compone como disparadores de menu.

Test visto fallar: compuesto como disparador el attr queda genuinamente
AUSENTE (no presente-undefined); solo, sigue anunciando su estado. player
18/18 · barrido server 923/6 (los 6 ajenos de contracts).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/uix/eidos/components/media-player/media-player-caption-float.svelte

@@ -68,6 +68,7 @@
 		{#snippet child({ props })}
 			<CaptionButton
 				{...props}
+				menuTrigger={true}
 				onclick={(e: MouseEvent) => {
 					(props as { onclick?: (e: MouseEvent) => void }).onclick?.(e);
 					// Opening the list IS the click's whole job here.

src/uix/morfo/components/media-player.ts

@@ -554,7 +554,19 @@ export const mediaPlayerMorfo = {
 			],
 			aria: [
 				{ attr: 'type', value: v.literal('button') },
-				{ attr: 'aria-pressed', value: v.stateRef('on') },
+				{
+					attr: 'aria-pressed',
+					value: v.stateRef('on'),
+					// Composed as the CaptionFloat's LIST trigger, the click opens a
+					// menu instead of toggling (the seam suppresses the handler) —
+					// announcing «pressed» next to the menu's aria-haspopup would
+					// state a control that click no longer exercises. The provider
+					// publishes the virtual prop (2-of-3: computed state lives
+					// there); same declared-suppression shape as `fieldLabelled`
+					// (morfo.md Step 4). `aria-keyshortcuts` stays: `c` toggles the
+					// captions wherever the focus sits, so it remains true.
+					condition: { when: 'prop-falsy', prop: 'menuTrigger' }
+				},
 				{ attr: 'aria-label', value: v.propRef('label'), severity: 'recommended' },
 				{ attr: 'aria-keyshortcuts', value: v.literal('c') }
 			]

src/uix/soma/components/media-player/components/media-player-caption-button.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+	import { readableActive } from '$libs/reactive';
 	import { partOpts } from '../../../provider';
 	import { mergeProps } from '../../../props';
 	import { createId } from '$active-uix/id';
@@ -10,18 +11,20 @@
 	let {
 		ref = $bindable(null),
 		id = createId(uid, 'media-player-caption-button'),
+		menuTrigger,
 		children,
 		child,
 		...restProps
 	}: MediaPlayerCaptionButtonProps = $props();
 
-	const state = MediaPlayerCaptionButtonProvider.create(
-		partOpts(
+	const state = MediaPlayerCaptionButtonProvider.create({
+		...partOpts(
 			() => id,
 			() => ref,
 			(v) => (ref = v)
-		)
-	);
+		),
+		menuTrigger: readableActive(() => menuTrigger)
+	});
 
 	const mergedProps = $derived(mergeProps(restProps, state.props));
 </script>

src/uix/soma/components/media-player/media-player-provider.svelte.test.ts

@@ -14,6 +14,7 @@ import {
 	MediaPlayerProvider,
 	MediaPlayerPlayButtonProvider,
 	MediaPlayerMuteButtonProvider,
+	MediaPlayerCaptionButtonProvider,
 	MediaPlayerTimeProvider,
 	MediaPlayerRestartButtonProvider,
 	MediaPlayerSkipButtonProvider
@@ -433,6 +434,40 @@ describe('MediaPlayerProvider', () => {
 		dom.dispose();
 	});
 
+	it('the caption button sheds aria-pressed when composed as a MENU trigger', () => {
+		const { dom } = installSomaHarness();
+		const root = document.createElement('div');
+		const fake = fakeEngine();
+		const opts = mediaPlayerOpts(root, () => fake.engine);
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = MediaPlayerProvider.create(opts);
+			vi.spyOn(MediaPlayerProvider, 'require').mockReturnValue(provider);
+			const plain = MediaPlayerCaptionButtonProvider.create({
+				id: state('cap-plain'),
+				ref: state<HTMLElement | null>(document.createElement('button')),
+				menuTrigger: state<boolean | undefined>(undefined)
+			});
+			const menuTrigger = MediaPlayerCaptionButtonProvider.create({
+				id: state('cap-menu'),
+				ref: state<HTMLElement | null>(document.createElement('button')),
+				menuTrigger: state<boolean | undefined>(true)
+			});
+			return { provider, plain, menuTrigger };
+		});
+
+		// On its own the control IS the captions toggle: its state is announced.
+		expect(result.plain.props).toMatchObject({ 'aria-pressed': 'false' });
+		// Composed as the CaptionFloat's trigger, the click opens a list instead
+		// (the seam suppresses the toggle): announcing «pressed» next to the
+		// menu's aria-haspopup would state a control the click no longer
+		// exercises. Genuinely ABSENT, not present-and-undefined.
+		expect(result.menuTrigger.props).not.toHaveProperty('aria-pressed');
+
+		cleanup();
+		dom.dispose();
+	});
+
 	it('drives PlayButton and MuteButton state + dynamic labels', () => {
 		const { dom } = installSomaHarness();
 		const root = document.createElement('div');

src/uix/soma/components/media-player/media-player-provider.svelte.ts

@@ -1444,7 +1444,8 @@ export class MediaPlayerPipButtonProvider {
 
 // ── Caption button ──────────────────────────────────────────────────────────────
 
-interface MediaPlayerCaptionButtonOpts extends WithRefOpts {}
+interface MediaPlayerCaptionButtonOpts
+	extends WithRefOpts, ActiveProps<{ menuTrigger: boolean | undefined }> {}
 
 export class MediaPlayerCaptionButtonProvider {
 	readonly opts: MediaPlayerCaptionButtonOpts;
@@ -1461,9 +1462,10 @@ export class MediaPlayerCaptionButtonProvider {
 			id: opts.id,
 			ref: opts.ref,
 			owner: this,
-			// Sources so renderProps resolves aria-label (propRef('label')) and the
-			// on-state pair (data-state + aria-pressed via stateRef('on')).
-			props: { label: () => this.label },
+			// Sources so renderProps resolves aria-label (propRef('label')), the
+			// on-state pair (data-state + aria-pressed via stateRef('on')) and the
+			// prop-falsy gate that sheds aria-pressed on a menu-trigger composition.
+			props: { label: () => this.label, menuTrigger: () => this.opts.menuTrigger.current },
 			states: { on: () => this.provider.captionsOn }
 		});
 	}

src/uix/soma/components/media-player/types.ts

@@ -145,7 +145,17 @@ export type MediaPlayerFullscreenButtonProps = WithChild<{ id?: string }> &
 export type MediaPlayerPipButtonProps = WithChild<{ id?: string }> &
 	Without<PrimitiveButtonAttributes, {}>;
 
-export type MediaPlayerCaptionButtonProps = WithChild<{ id?: string }> &
+export type MediaPlayerCaptionButtonProps = WithChild<{
+	id?: string;
+	/**
+	 * Composed as the trigger of a caption LIST (`CaptionFloat` sets this): the
+	 * click opens the menu instead of toggling, so the morfo suppresses
+	 * `aria-pressed` — the menu's `aria-haspopup` / `aria-expanded` carry the
+	 * announcement. Leave unset when the button stands alone as the toggle.
+	 * @default undefined
+	 */
+	menuTrigger?: boolean;
+}> &
 	Without<PrimitiveButtonAttributes, {}>;
 
 /**