/** Browser-safe metadata and locator source for one stored image. */
export interface VisionAttachmentView {
    attachmentId: string;
    mediaType: 'image/png' | 'image/jpeg' | 'image/webp' | 'image/gif';
    bytes: number;
    width: number;
    height: number;
    name?: string;
}
/** Browser projection of one session-scoped vision call. */
export type VisionCallView = {
    id: string;
    createdAt: number;
    durationMs: number;
    origin: 'message' | 'tool' | 'tool-result';
    backendId: string;
    model: string;
    prompt: string;
    attachment: VisionAttachmentView;
} & ({
    status: 'success';
    title: string;
    result: string;
} | {
    status: 'error';
    error: string;
});
/** One date section in the vertical call list. */
export interface VisionCallGroup {
    date: string;
    calls: VisionCallView[];
}
/** Validate the host response and retain only fields rendered by the client. */
export declare function parseCallsPayload(payload: unknown): VisionCallView[];
/** Build the stable logical locator shown for one opaque attachment id. */
export declare function attachmentLocator(attachmentId: string): string;
/** Build the read-only call-list URL for one session. */
export declare function callsUrl(sessionId: string): string;
/** Build a preview URL authorized by both session and call identity. */
export declare function imageUrl(sessionId: string, callId: string): string;
/** Sort calls newest first and collect them into date sections. */
export declare function groupCalls(calls: readonly VisionCallView[], formatDate?: (createdAt: number) => string): VisionCallGroup[];
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