/**
 * Service console / lifecycle / multi-engine install / SQL switch (Wave U3).
 * Extracted from system-db-engines.ts. Behaviour preserved.
 */
import type { IncomingMessage, ServerResponse } from 'node:http';
import type { AppContext } from '../app-context.js';
export declare function handleSystemDbConsoleRoutes(ctx: AppContext, req: IncomingMessage, res: ServerResponse, url: URL, method: string): Promise<boolean>;
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