Is it considered disobedience for a husband to refuse his mother’s wish for his wife to come down daily to serve her, especially if the wife is harmed by it, and is it permissible for the mother to compel her son to divorce his wife or prevent him from entering her house because of this?

You must provide independent housing for your wife, where no one else shares it with her, and she is not obligated to serve your mother unless she volunteers. You do not owe obedience to your mother if it entails oppressing your wife, for honoring parents does not involve oppressing one's spouse. Strive to provide independent housing for your wife; otherwise, house her in your dwelling within your parents' home while ensuring her independence and not obligating her to serve your mother. You are not disobedient to your parents for what you have mentioned, and you must honor them righteeously. Your mother's anger or prayers against you will not harm you if they are without just cause.