/**
 * Electron sudo backend.
 *
 * When node-server runs *inside* an Electron main process (`process.versions
 * .electron` is set), the native gesture is `dialog.showMessageBox` with three
 * buttons (Deny / Allow Once / Always). On "Always" an editable pattern is
 * captured via {@link ElectronBackendDeps.promptInput}; the default
 * implementation runs `window.prompt` inside a transient offscreen
 * `BrowserWindow`. Both seams are injectable so tests never touch Electron.
 *
 * Fail closed: a thrown dialog call, a cancelled prompt, or an unknown button
 * resolves to `deny` / falls back to the suggested pattern.
 */
import type { SudoBackend } from './types.js';
/** Result shape of `dialog.showMessageBox`. */
interface MessageBoxResult {
    response: number;
}
/** Injection seams. */
export interface ElectronBackendDeps {
    /** Raise a modal message box; resolves the clicked button index. */
    showMessageBox?: (options: {
        type: string;
        buttons: string[];
        defaultId: number;
        cancelId: number;
        title: string;
        message: string;
        detail: string;
    }) => Promise<MessageBoxResult>;
    /** Capture an editable pattern; resolves null on cancel. */
    promptInput?: (message: string, defaultValue: string) => Promise<string | null>;
}
/** Create the Electron backend. */
export declare function createElectronBackend(deps?: ElectronBackendDeps): SudoBackend;
export {};