/**
 * Send verification email with magic link token.
 * @param to - Recipient email address
 * @param token - Verification token to include in link
 * @param origin - Optional frontend origin URL (e.g., 'https://course.example.com')
 *                 If not provided, falls back to APP_URL env var or localhost
 */
export declare function sendVerificationEmail(to: string, token: string, origin?: string): Promise<void>;
/**
 * Send password reset email with magic link token.
 * @param to - Recipient email address
 * @param token - Reset token to include in link
 * @param origin - Optional frontend origin URL (e.g., 'https://course.example.com')
 *                 If not provided, falls back to APP_URL env var or localhost
 */
export declare function sendPasswordResetEmail(to: string, token: string, origin?: string): Promise<void>;
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