/**
 * Chapter-rendering mixin — duration resolution, chapter-marker DOM rebuild,
 * and per-frame progress/buffer/hover updates.
 *
 * `progressBar.ts` and `chapters.ts` own the pure free functions; this mixin
 * binds them to the plugin's sliderRefs, chapterRefs, player, and
 * cachedDuration fields.
 *
 * Owns: resolveDuration, refreshChaptersAndDuration, renderChapterMarkers,
 *       updateChapterProgress, updateChapterBuffer, updateChapterHover,
 *       findChapterTitle, previousChapter, nextChapter.
 */
import type { DesktopUiInternals } from '../internals.js';
export declare const chapterMethods: {
    readonly resolveDuration: (this: DesktopUiInternals) => number;
    readonly refreshChaptersAndDuration: (this: DesktopUiInternals) => void;
    /** Rebuild the segmented chapter-marker DOM for the current item. */
    readonly renderChapterMarkers: (this: DesktopUiInternals) => void;
    readonly updateChapterProgress: (this: DesktopUiInternals, percentage: number) => void;
    readonly updateChapterBuffer: (this: DesktopUiInternals, bufferedPct: number) => void;
    readonly updateChapterHover: (this: DesktopUiInternals, scrubPct: number) => void;
    readonly findChapterTitle: (this: DesktopUiInternals, time: number) => string | undefined;
    readonly previousChapter: (this: DesktopUiInternals) => void;
    readonly nextChapter: (this: DesktopUiInternals) => void;
};