export declare function ensureConvDir(convId: string): string;
export declare function saveMediaFile(convId: string, base64Data: string, mimeType: string, prefix?: string): {
    filename: string;
    filePath: string;
    url: string;
};
export declare function saveTextFile(convId: string, content: string, filename: string): {
    filename: string;
    filePath: string;
    url: string;
};
export interface ProcessedContent {
    content: any[];
    mediaFiles: string[];
}
export declare function extractAndSaveMedia(convId: string, contentBlocks: any[]): ProcessedContent;
export declare function loadMediaAsBase64(convId: string, content: any[]): any[];
export declare function resolveMediaUrl(convId: string, url: string): string;
export declare function cleanupConvFiles(convId: string): void;
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