import type { TicketStatus, TicketPriority, SLAMetrics } from '../types';
/**
 * Join a base path with a sub-path, avoiding double slashes.
 * Used by Root components to construct navigation paths from basePath.
 */
export declare function joinPath(base: string, path: string): string;
export declare function isAdminRole(role?: string | null): boolean;
/** Humanise a ContactInquiry.category slug for display, e.g. "plugin-developer" → "Plugin developer". */
export declare function humanizeCategory(value?: string | null): string;
/**
 * Format ticket status for display
 */
export declare function formatTicketStatus(status: TicketStatus): string;
/**
 * Get color for ticket priority
 */
export declare function getPriorityColor(priority: TicketPriority): string;
/**
 * Get icon for ticket priority
 */
export declare function getPriorityIcon(priority: import('../types').SupportTicketPriority | TicketPriority): string;
/**
 * Format file size for display
 */
export declare function formatFileSize(bytes: number): string;
/**
 * Format time ago (e.g., "2 hours ago")
 */
export declare function formatTimeAgo(date: string | Date): string;
/**
 * Format duration in minutes to human-readable string
 */
export declare function formatDuration(minutes: number): string;
/**
 * Calculate SLA breach percentage
 */
export declare function calculateSLAStatus(slaMetrics: SLAMetrics | undefined): {
    status: 'safe' | 'warning' | 'danger';
    label: string;
    color: string;
};
/**
 * Truncate text with ellipsis
 */
export declare function truncateText(text: string, maxLength: number): string;
/**
 * Extract initials from name
 */
export declare function getInitials(name: string): string;
/**
 * Validate email address
 */
export declare function isValidEmail(email: string): boolean;
/**
 * Generate color from string (for avatars, categories, etc.)
 */
export declare function stringToColor(str: string): string;