/**
 * Chart helpers — series normalization, color resolution, value formatting.
 * Mirrors the editor app's helper, minus the brand-kit palette path (the
 * presenter is kit-agnostic; `useKitPalette: true` simply falls through to
 * `element.colors`).
 */
import type { ChartElement, ChartSeries, ChartDataPoint, ChartValueFormat } from '../types';
export declare function normalizeSeries(element: ChartElement): ChartSeries[];
export declare function paletteFor(element: ChartElement): string[];
export declare function resolveColor(element: ChartElement, seriesIndex: number, pointIndex: number, point: ChartDataPoint | undefined, series: ChartSeries | undefined): string;
export declare function formatValue(value: number, fmt?: ChartValueFormat): string;
export declare function computeYRange(element: ChartElement): {
    min: number;
    max: number;
};