/**
 * Settings Handler
 *
 * Handles saving and loading devbar settings to/from .devbar/settings.json
 */
/**
 * devbar settings schema
 *
 * Canonical definition: packages/devbar/src/settings.ts
 * Keep in sync — this copy exists to avoid a circular dependency.
 */
export interface DevBarSettings {
    version: 1;
    position: 'bottom-left' | 'bottom-right' | 'top-left' | 'top-right' | 'bottom-center';
    themeMode: 'dark' | 'light' | 'system';
    compactMode: boolean;
    accentColor: string;
    showScreenshot: boolean;
    showConsoleBadges: boolean;
    showTooltips: boolean;
    saveLocation: 'auto' | 'local' | 'download';
    screenshotQuality: number;
    showMetrics: {
        breakpoint: boolean;
        fcp: boolean;
        lcp: boolean;
        cls: boolean;
        inp: boolean;
        pageSize: boolean;
    };
    debug: boolean;
}
/**
 * Result from saving settings
 */
export interface SettingsSaveResult {
    settingsPath: string;
}
/**
 * Handle save-settings command from browser
 *
 * Saves settings to .devbar/settings.json in the project root
 */
export declare function handleSaveSettings(data: {
    settings: DevBarSettings;
}): Promise<SettingsSaveResult>;
/**
 * Handle load-settings command from browser
 *
 * Loads settings from .devbar/settings.json if it exists
 * Returns null if file doesn't exist
 */
export declare function handleLoadSettings(): Promise<DevBarSettings | null>;
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