Does anger invalidate fasting, and is the fast of one who got angry and quarreled with people considered invalid, requiring them to repeat that day, even if they were not the aggressor?

If a fasting person becomes angry and quarrels, their fast is valid, and there is no need for them to repeat it, whether they were the aggressor or the victim. However, they should cultivate forbearance, avoid anger and quarreling, and say to anyone who insults or fights them, "Indeed, I am a fasting person," in obedience to the Prophet’s (peace and blessings of Allah be upon him) saying.