/**
 * Injects plugin chrome styles (dock / layer / palettes) into `document.head`.
 * Also ensures toolbar styles from cad-simple-viewer.
 *
 * Safe to call from multiple components; subsequent calls are no-ops.
 */
export declare function acuiEnsureUiStyles(): void;
/**
 * Removes injected UI styles when no toolbar or layer manager remains in the DOM.
 */
export declare function acuiRemoveUiStylesIfUnused(): void;
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