/**
 * Serialization + download helpers for exporting SQL editor results.
 *
 * Kept dependency-free and SSR-safe: `downloadFile` no-ops outside the browser.
 */
/** Render a matrix as RFC-4180-style CSV with a header row. */
export declare function toCSVTable(headers: string[], rows: unknown[][]): string;
/** Render rows as RFC-4180-style CSV with a header row of the given columns. */
export declare function toCSV(columns: string[], rows: Record<string, unknown>[]): string;
/** Render rows as a pretty-printed JSON array. */
export declare function toJSON(rows: Record<string, unknown>[]): string;
/**
 * Trigger a client-side download of `content` as a file named `name` with the
 * given MIME type. No-ops during SSR.
 */
export declare function downloadFile(name: string, mime: string, content: string): void;
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