import type { PanelToolsToolId } from '../components/PanelTools/panel-tools-types';
export type ShellResponsiveMode = 'desktop' | 'tablet' | 'mobile';
export type MobileDestination = 'area' | 'search' | 'inbox' | 'messages' | 'agents' | 'help';
export type ShellInboxToolId = PanelToolsToolId;
export declare const SHELL_DESKTOP_BREAKPOINT = 1200;
export declare const SHELL_MOBILE_BREAKPOINT = 768;
export declare const SHELL_DEFAULT_INBOX_TOOL: ShellInboxToolId;
export declare function resolveShellResponsiveMode(width: number): ShellResponsiveMode;
export declare function resolveManagedShellPageCapacity(mode: ShellResponsiveMode): 'roomy' | 'compact' | 'constrained';
export declare function shellMobileDestinationForTool(open: boolean, tool: PanelToolsToolId | ''): MobileDestination;
export declare function isShellInboxTool(tool: string): tool is ShellInboxToolId;
export declare function resolveAvailableInboxTool(preferred: string, available: readonly PanelToolsToolId[]): ShellInboxToolId | '';
/** Active-destination reselects are inert unless they also dismiss the Menu pane. */
export declare function shouldEmitMobileDestinationChange(active: MobileDestination, next: MobileDestination, navigationOpen: boolean): boolean;
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