/**
 * GET feedback with optional date filters
 */
export declare function getFeedback(from?: string, to?: string): Promise<string>;
/**
 * UPDATE feedback by ID
 */
export declare function updateFeedback(id: string, updates: Record<string, unknown>): Promise<object>;
/**
 * CREATE new feedback
 */
export declare function createFeedback(data: Record<string, unknown>): Promise<object>;
/**
 * Generic API client for custom requests
 */
export declare const apiClient: {
    get(endpoint: string): Promise<string | object>;
    post(endpoint: string, data: Record<string, unknown>): Promise<object>;
    put(endpoint: string, data: Record<string, unknown>): Promise<object>;
    patch(endpoint: string, data: Record<string, unknown>): Promise<object>;
};
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