/**
 * @module database-designer-erd
 * @description Client-side ERD generator for the Database Designer Angular wizard.
 *
 * Mirrors the server-side `erd-generator.ts` in `@memberjunction/database-designer-core`
 * but works with Angular-side types (`EntityTableSpec`, `ColumnSpec`, `ForeignKeySpec`)
 * to avoid importing server-only packages into the browser bundle.
 *
 * Called by `StepReviewComponent` to render an `erDiagram` in the wizard review step.
 */
import type { EntityTableSpec } from './database-designer.types.js';
/**
 * Generates a mermaid `erDiagram` block from one or more `EntityTableSpec` objects.
 *
 * Returns `null` for a single table with no FK relationships — a lone box with
 * no connections adds no visual value over the prototype column table.
 */
export declare function generateERDFromTableSpec(tables: EntityTableSpec[]): string | null;
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