/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { themeManager } from '../ui/themes/theme-manager.js';
import {} from '../config/settings.js';
/**
 * Validates the configured theme.
 * @param settings The loaded application settings.
 * @returns An error message if the theme is not found, otherwise null.
 */
export function validateTheme(settings) {
    const effectiveTheme = settings.merged.ui?.theme;
    if (effectiveTheme && !themeManager.findThemeByName(effectiveTheme)) {
        return `Theme "${effectiveTheme}" not found.`;
    }
    return null;
}
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