import { FC } from 'react';
/**
 * UI-5 — content of the Slack tab when a Slack thread is already
 * linked to the current Hiver conversation. Layout per Figma frame
 * 683:666565 (and variants 665917 / 660800):
 *
 *   ┌──────────────────────────────────────┐
 *   │ Parent message (pinned, not scroll)  │
 *   ├──────────────────────────────────────┤
 *   │ Reply 1                              │
 *   │ Reply 2                              │
 *   │ ...                                  │ ← scrollable
 *   ├──────────────────────────────────────┤
 *   │ Composer (UI-9 slot)                 │
 *   └──────────────────────────────────────┘
 *
 * Backend's `messages` array is reverse-chronological with the
 * parent slot pinned at index 0 (cache shape — see plan-slack-m1-
 * phase-4). UI-5 keeps that invariant in render: index 0 is the
 * <ParentPin>, the tail is the scrollable list reversed so newest
 * sits at the bottom (chat convention).
 *
 * The 50-entry trim flag (`isTrimmed`) renders a muted footer at
 * the top of the scroll list when the cache hit the M1 cap.
 */
export declare const LinkedConversationPanel: FC;
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