/**
 * SupenApp: The central application instance.
 * Provides a small lifecycle and event bridge for channels.
 */
export declare class SupenApp {
    private static instance;
    private initialized;
    private constructor();
    static getInstance(): SupenApp;
    private listeners;
    on(event: string, fn: Function): void;
    emit(event: string, data: any): void;
    init(): Promise<void>;
}
export declare const app: SupenApp;
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