fix(eidos): dropdown-menu z-index + finish ActiveDom canonization (tabs, resize-observer)

Bleed-through: the portaled [data-dropdown-menu-content] had z-index:auto, so
any positioned page element with a positive z-index (e.g. a selected
[data-toggle-group-item], z-index 1) painted THROUGH it. In the Words inspector
the Add-block menu showed the Typography toggle chips ("Predeterminada" /
"Normal") bleeding through. Added `content-z: 80` to the dropdown-menu recipe
(matches `select`, its sibling click-triggered overlay) + `z-index:
var(--dropdown-menu-content-z, 80)` on content + sub-content; regenerated
base.css. The soma floating layer reads this computed z-index and mirrors it
onto the positioner wrapper. The rest of the menu family (context-menu /
menubar / navigation-menu) shares the same latent gap — deferred.

Canonization (finishes the dom.raf rollout — zero raw requestAnimationFrame
left in src/uix):
  - tabs-indicator.svelte: requestAnimationFrame/cancelAnimationFrame +
    new MutationObserver + new ResizeObserver -> eidos.dom.raf /
    observeMutation / observeResize (disposer pattern via ActiveEidos.require).
  - tabs.svelte: new ResizeObserver -> eidos.dom.observeResize.
  - resize-observer.svelte.ts: requestFrame/cancelFrame (raw handle) ->
    dom.raf (disposer); fixed the stale "Debounces via requestAnimationFrame"
    comment.

Browser-verified in the Words demo: column Add-block menu is opaque and on top
(elementFromPoint at the chip centers returns menu items, inMenu:true); the
menu options are collapsed + localized (one Encabezado, one Lista con viñetas);
empty-column delete works (column persists addressable with 0 children).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/uix/eidos/components/dropdown-menu/dropdown-menu.css

@@ -26,6 +26,11 @@
 
 [data-dropdown-menu-content],
 [data-dropdown-menu-sub-content] {
+	/* Top overlay band so the portaled panel paints above positioned page
+	 * content (e.g. selected toggle-group chips with z-index 1). The soma
+	 * floating layer reads this computed z-index and mirrors it onto the
+	 * positioner wrapper. */
+	z-index: var(--dropdown-menu-content-z, 80);
 	min-inline-size: var(--dropdown-menu-content-min-width, 12rem);
 	max-block-size: var(--dropdown-menu-content-max-height, min(60vh, 22rem));
 	overflow-y: auto;

src/uix/eidos/components/tabs/tabs-indicator.svelte

@@ -16,18 +16,25 @@
 	 * snaps to the active trigger).
 	 */
 	import { composeInlineStyle } from '$uix/eidos/lib/style';
+	import { ActiveEidos } from '$uix/eidos';
 	import * as Tabs from '$soma/components/tabs';
 	import type { TabsIndicatorProps } from './types';
 
 	let { ref = $bindable<HTMLElement | null>(null), style, ...rest }: TabsIndicatorProps = $props();
 
+	const eidos = ActiveEidos.require();
+
 	let geom = $state({ x: 0, y: 0, w: 0, h: 0, ready: false });
-	let rafId: number | null = null;
+	// Disposer for the pending measure frame (null when none scheduled);
+	// doubles as the coalescing guard. Routed through `eidos.dom.raf` (the
+	// canonical ActiveDom frame scheduler — iframe / popup / happy-dom safe)
+	// instead of a bare `requestAnimationFrame`.
+	let cancelFrame: (() => void) | null = null;
 
 	function measure() {
-		if (rafId !== null) return;
-		rafId = requestAnimationFrame(() => {
-			rafId = null;
+		if (cancelFrame !== null) return;
+		cancelFrame = eidos.dom.raf(() => {
+			cancelFrame = null;
 			const el = ref;
 			if (!el) return;
 			const list = el.parentElement;
@@ -43,7 +50,7 @@
 				h: triggerRect.height,
 				ready: true
 			};
-		});
+		}, ref);
 	}
 
 	const geometryStyle = $derived(
@@ -61,34 +68,30 @@
 
 		measure();
 
-		const mo = new MutationObserver(() => measure());
-		mo.observe(list, {
-			subtree: true,
-			attributes: true,
-			attributeFilter: ['data-state', 'data-value']
-		});
-
-		const ro = new ResizeObserver(() => measure());
-		ro.observe(list);
+		// All DOM observation routed through ActiveDom (iframe / popup safe,
+		// cleanup tracked) instead of bare `new MutationObserver` /
+		// `new ResizeObserver`. Each returns its own disposer.
+		const disposers = [
+			eidos.dom.observeMutation(list, () => measure(), {
+				subtree: true,
+				attributes: true,
+				attributeFilter: ['data-state', 'data-value']
+			}),
+			eidos.dom.observeResize(list, () => measure())
+		];
 		for (const child of Array.from(list.children)) {
 			if (child === el) continue;
-			if (child instanceof HTMLElement) ro.observe(child);
+			if (child instanceof HTMLElement) {
+				disposers.push(eidos.dom.observeResize(child, () => measure()));
+			}
 		}
 
 		return () => {
-			mo.disconnect();
-			ro.disconnect();
-			if (rafId !== null) {
-				cancelAnimationFrame(rafId);
-				rafId = null;
-			}
+			for (const dispose of disposers) dispose?.();
+			cancelFrame?.();
+			cancelFrame = null;
 		};
 	});
 </script>
 
-<Tabs.Indicator
-	{...rest}
-	bind:ref
-	style={mergedStyle}
-	data-ready={geom.ready ? '' : undefined}
-/>
+<Tabs.Indicator {...rest} bind:ref style={mergedStyle} data-ready={geom.ready ? '' : undefined} />

src/uix/eidos/components/tabs/tabs.svelte

@@ -79,13 +79,13 @@
 			isCollapsed = false;
 			return;
 		}
-		const ro = new ResizeObserver((entries) => {
+		// Routed through ActiveDom (iframe / popup safe, cleanup tracked)
+		// instead of a bare `new ResizeObserver`.
+		return eidos.dom.observeResize(el, (entries) => {
 			for (const entry of entries) {
 				isCollapsed = entry.contentRect.width < px;
 			}
 		});
-		ro.observe(el);
-		return () => ro.disconnect();
 	});
 </script>
 

src/uix/eidos/generated/base.css

@@ -3064,6 +3064,7 @@
 	--splitter-transition-ease: var(--ease-default);
 	--navigation-menu-indicator-w: 0px;
 	--navigation-menu-indicator-x: 0px;
+	--dropdown-menu-content-z: 80;
 	--dropdown-menu-content-min-width: 12rem;
 	--dropdown-menu-content-max-height: min(60vh, 22rem);
 	--dropdown-menu-content-padding: var(--space-1);

src/uix/eidos/lib/recipes/base.ts

@@ -4037,6 +4037,12 @@ export const THEME_BASE_RECIPE_TOKENS = {
 	// DropdownMenu — panel chrome + item rows. Mirror tokens to context-menu.
 	// ─────────────────────────────────────────────────────────────────────
 	'dropdown-menu': {
+		// Floating menu panel stacks in the top overlay band (matches
+		// `select` — both are click-triggered list overlays). Without this
+		// the portaled panel inherits `z-index: auto` and any positioned
+		// page element with a positive z-index (e.g. a selected
+		// `[data-toggle-group-item]`, z-index 1) paints THROUGH it.
+		'content-z': '80',
 		'content-min-width': '12rem',
 		'content-max-height': 'min(60vh, 22rem)',
 		'content-padding': 'var(--space-1)',

src/uix/soma/layers/resize-observer.svelte.ts

@@ -4,22 +4,24 @@ type Getter<T> = () => T;
 
 /**
  * Wraps native ResizeObserver with Svelte $effect lifecycle.
- * Debounces via requestAnimationFrame.
+ * Debounces via `dom.raf` (the canonical ActiveDom frame scheduler —
+ * iframe / popup / happy-dom safe; returns a disposer rather than a raw
+ * handle, so the per-resize frame is cancelled cleanly).
  */
 export class ResizeObserver$ {
 	constructor(dom: ActiveDom, node: Getter<HTMLElement | null>, onResize: () => void) {
 		$effect(() => {
-			let rAF = 0;
+			let cancelFrame: (() => void) | null = null;
 			const el = node();
 			if (!el) return;
 
 			const cleanupResize = dom.observeResize(el, () => {
-				dom.cancelFrame(rAF, el);
-				rAF = dom.requestFrame(onResize, el);
+				cancelFrame?.();
+				cancelFrame = dom.raf(onResize, el);
 			});
 
 			return () => {
-				dom.cancelFrame(rAF, el);
+				cancelFrame?.();
 				cleanupResize();
 			};
 		});