/**
 * Stamps every element that belongs to a component's OWN template with a
 * `data-lw-scope="<componentId>"` attribute — excluding any nested child
 * component's subtree.
 *
 * This is what makes scoped `<style>` actually respect component
 * boundaries (see style_scoper.ts's docblock and architecture-overview
 * memory's "cross-component leak" note): a parent's `.box` rule used to be
 * a `[wire:id="parent"] .box` descendant selector, which matches ANY
 * `.box` in the parent's DOM subtree — including one belonging to a
 * wholly separate child component embedded inside it, since CSS
 * descendant selectors don't know about component boundaries. Real
 * per-element marking (the same technique Vue's `scoped` `<style>`
 * attribute uses) fixes this structurally: only elements this component
 * itself rendered get the stamp, so `.box[data-lw-scope="parent"]` cannot
 * match a `.box` that only carries `data-lw-scope="child"`.
 *
 * A "nested child component" is identified structurally: any tag with a
 * `wire:id` attribute that ISN'T the very first tag encountered (which is
 * always this component's own root — every rendered component root
 * carries `wire:id`, see `request_handler.ts`'s `insertAttributesIntoHtmlRoot`
 * call). Everything inside that nested tag is left untouched — it was
 * already stamped with the CHILD's own id during the child's own
 * dehydrate(), which always completes before the parent's (children mount
 * synchronously during the parent's own render pass, so their finished,
 * already-stamped HTML is what gets embedded into the parent's markup).
 */
export declare function markScopedElements(html: string, componentId: string): string;