feat(eidos): Lote A — float-panel-close composes IconButton

float-panel-close now composes the canonical <IconButton> via soma's child
snippet (variant/color defer to Button defaults; aria-label via the common close
label). Extracted [data-float-panel-close] from the shared chrome selector so
Action + StageTrigger keep their square-button styling while Close inherits
button.css. No recipe change (the shared --float-panel-button-size etc. stay for
the siblings). Verified in browser (solid-primary icon close, "Cerrar").

Completes the close family (dialog/drawer/popover/banner/toast/float-panel).
Excludes words/palabras/chronos.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/uix/eidos/components/float-panel/float-panel-close.svelte

@@ -1,10 +1,40 @@
 <script lang="ts">
+	/**
+	 * Eidos `FloatPanel.Close` — composes the canonical `<IconButton>` via soma's
+	 * `child` snippet (no bespoke close chrome — it inherits Button's chrome, focus
+	 * ring and disabled). `variant` / `color` defer to Button's canonical defaults;
+	 * the accessible name routes through langs ("Cerrar"). A `child` snippet
+	 * bypasses IconButton.
+	 */
+	import { ActiveEidos } from '$uix/eidos';
 	import * as FloatPanel from '$soma/components/float-panel';
+	import { IconButton } from '$uix/eidos/components/icon-button';
+	import { SvgX } from '$uix/eidos/components/svg';
 	import type { FloatPanelCloseProps } from './types';
 
-	let { children, ...rest }: FloatPanelCloseProps = $props();
+	let {
+		variant,
+		size,
+		color,
+		'aria-label': ariaLabel,
+		child: outerChild,
+		children,
+		...rest
+	}: FloatPanelCloseProps = $props();
+
+	const eidos = ActiveEidos.require();
+	const resolvedSize = $derived(size ?? 'sm');
+	const closeLabel = $derived(ariaLabel ?? eidos.langs.ts('#?common.buttons.close|Close'));
 </script>
 
 <FloatPanel.Close {...rest}>
-	{@render children?.()}
+	{#snippet child({ props })}
+		{#if outerChild}
+			{@render outerChild({ props })}
+		{:else}
+			<IconButton {...props} {variant} size={resolvedSize} {color} aria-label={closeLabel}>
+				{#if children}{@render children()}{:else}<SvgX />{/if}
+			</IconButton>
+		{/if}
+	{/snippet}
 </FloatPanel.Close>

src/uix/eidos/components/float-panel/float-panel.css

@@ -169,10 +169,10 @@
 	flex: 0 0 auto;
 }
 
-/* Close + Action + StageTrigger share ONE square icon-button chrome, so a custom
-   action (a delete icon, say) and the stage buttons sit flush next to Close with
-   identical sizing/hover/focus. */
-[data-float-panel-close],
+/* Action + StageTrigger share ONE square icon-button chrome, so a custom action
+   (a delete icon, say) and the stage buttons sit flush next to Close with
+   identical sizing/hover/focus. (Close itself composes the canonical
+   <IconButton>, so its chrome comes from button.css.) */
 [data-float-panel-action],
 [data-float-panel-stage-trigger] {
 	display: inline-flex;
@@ -189,13 +189,11 @@
 	line-height: 1;
 	cursor: pointer;
 }
-[data-float-panel-close]:hover,
 [data-float-panel-action]:hover,
 [data-float-panel-stage-trigger]:hover {
 	background: var(--color-surface-muted);
 	color: var(--color-content-primary);
 }
-[data-float-panel-close]:focus-visible,
 [data-float-panel-action]:focus-visible,
 [data-float-panel-stage-trigger]:focus-visible {
 	outline: none;

src/uix/eidos/components/float-panel/types.ts

@@ -12,8 +12,9 @@ import type {
 	ResizeHandleProps,
 	ResizeGripProps
 } from '$soma/components/float-panel';
-import type { ColorRole, ControlVariant } from '$uix/eidos/lib/types';
+import type { ColorRole, ControlVariant, ResponsiveProp } from '$uix/eidos/lib/types';
 import type { MotionPresetName } from '$uix/eidos/lib/motion/registry';
+import type { ButtonVariant, ButtonSize, ButtonProps } from '$uix/eidos/components/button';
 
 /** Surface treatment of the panel — canonical control variants (no invented values). */
 export type FloatPanelVariant = ControlVariant;
@@ -49,7 +50,14 @@ export type FloatPanelHeaderProps = HeaderProps & {
 	closable?: boolean;
 };
 export type FloatPanelTitleProps = TitleProps;
-export type FloatPanelCloseProps = CloseProps;
+export type FloatPanelCloseProps = CloseProps & {
+	/** Button visual variant — defers to Button's canonical default. */
+	variant?: ButtonVariant;
+	/** Button size of the close control. @default 'sm' */
+	size?: ResponsiveProp<ButtonSize>;
+	/** Hierarchical color — defers to Button's canonical default. */
+	color?: ButtonProps['color'];
+};
 /** Header button group (right-aligned cluster holding Close / Action / custom buttons). */
 export type FloatPanelControlsProps = ControlsProps;
 /**