/**
 * Enhanced theme detection with caching and robust fallbacks
 * @returns {object} Theme object with isDark, bg, text, accent
 */
export function detectTheme(): object;
/**
 * Apply theme to CSS variables
 */
export function syncTheme(): object;
/**
 * Clear theme cache (useful when theme changes)
 */
export function clearThemeCache(): void;
/**
 * Setup theme watchers with debouncing
 */
export function setupThemeWatchers(): void;
/**
 * Cleanup theme watchers
 */
export function teardownThemeWatchers(): void;
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