export declare const CHART_COLORS: string[];
export interface ChartSeries {
    name: string;
    data: number[];
    color?: string;
}
export interface ChartDataPoint {
    label: string;
    value: number;
    color?: string;
}
/** Map a value [min..max] → [rangeMin..rangeMax] */
export declare function scale(value: number, min: number, max: number, rangeMin: number, rangeMax: number): number;
/** Compute nice axis ticks for a range */
export declare function niceTicks(min: number, max: number, count?: number): number[];
/** Smooth bezier path through points */
export declare function smoothPath(points: [number, number][]): string;
/** Format number for display */
export declare function fmtNum(n: number): string;
export declare function generateUniqueId(prefix: string): string;