/**
 * Card JSON builders for Feishu CardKit 2.0 streaming.
 *
 * Three states, each as deliberate as a Wes Anderson frame:
 *   thinking  — empty canvas, breathing loading icon
 *   complete  — full text, optional elapsed footer
 *   fallback  — non-CardKit interactive card for IM patch mode
 */
export declare const STREAMING_ELEMENT_ID = "streaming_content";
export declare function thinkingCard(): Record<string, unknown>;
export declare function completeCard(text: string, options?: {
    elapsed?: number;
}): Record<string, unknown>;
export declare function fallbackThinkingCard(): Record<string, unknown>;
export declare function fallbackStreamingCard(text: string): Record<string, unknown>;
export declare function fallbackCompleteCard(text: string, options?: {
    elapsed?: number;
}): Record<string, unknown>;
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