/**
 * dsh-widgets — the right-rail slot body.
 *
 * Hosted in `conversation.input.overlay`; the registration in `client/index.ts`
 * records why that seat and not `shell.overlay`. One component draws the whole
 * right-rail group as ONE sliding surface:
 *
 *   drawer wrapper ── RailWave ── resting deck (grid of cards + the add tile)
 *                  ├─ the magnify overlay (inside RailWave)
 *                  └─ the add panel (settings pages, portaled to <body>)
 *
 * Moved out of `client/index.ts` (Phase 2.9) with its body unchanged; the
 * indentation is kept on purpose so the move stays byte-auditable. It receives the
 * bridge handles instead of closing over them: `useBridge` / `setPrefs` /
 * `runCommand` are stable, while `prefs` and `railBudget` are LIVE bindings, so
 * those arrive as getters and every EVENT-HANDLER read goes through them (a
 * captured value would go stale between the emit and the re-render).
 */
import * as React from 'react';
import { type BridgeSnapshot } from '../runtime/bridge';
import { type Prefs } from '../runtime/prefs';
/** What the rail view needs from the composition root that owns the bridge. */
export interface RailViewDeps {
    /** Subscribe to the bridge (re-renders the rail on every emit). */
    useBridge: () => BridgeSnapshot;
    /** The LIVE prefs binding — read it once per render, never capture it. */
    getPrefs: () => Prefs;
    /** Merge a patch into the live prefs, persist, then emit. */
    setPrefs: (patch: Partial<Prefs>) => void;
    /**
     * The LIVE rail budget (px): the space the product’s transcript measure leaves
     * for the rail. It must NOT come from the bridge snapshot — a yield can be
     * written straight to the DOM and outrun the snapshot, and the stale value would
     * write the pre-yield geometry back.
     */
    getRailBudget: () => number;
    /** Run a slash command (armed action cards). */
    runCommand: (line: string) => void;
    /** Hand the drawer wrapper element back to the measurement layer. */
    setDrawerEl: (el: HTMLDivElement | null) => void;
}
/** Build the right-rail slot component bound to one composition root. */
export declare function createRailView(deps: RailViewDeps): () => React.ReactElement | null;