/**
 * Database Migrations
 *
 * Creates the talker_sessions, talker_messages and talker_message_status
 * tables. Safe to run multiple times (uses IF NOT EXISTS). Statements are
 * single-sourced from `./schema.ts`, shared with `libsql-store.ts`'s queries.
 */
import type { Client } from "@libsql/client";
/**
 * `client` defaults to the legacy singleton (`./client.ts`) when omitted,
 * matching the pre-`TalkerStore` call shape (`initDbClient(...)` then
 * `runMigrations()`) - `resolveStore` (`./resolve-store.ts`) always passes
 * one explicitly.
 */
export declare function runMigrations(client?: Client | null): Promise<void>;