ما هي كيفية الغسل الأكبر وغسل الجمعة، وما الفرق والحكمة الشرعية بينهما؟

This text indicates that there is no difference in the method of performing ghusl (ritual bath) for Jumu'ah (Friday prayer) and janabah (state of impurity requiring a full bath), but rather in the intention. So, if one intends both with a single ghusl, it is sufficient. As for the legal wisdom behind ghusl for janabah, it is that semen exits from the entire body, causing heaviness and sluggishness. Performing ghusl restores vitality and strengthens both the body and spirit, and removes the distance between the heart and good spirits. As for ghusl for Jumu'ah, it is prescribed because Friday is the weekly Eid of Muslims, when they gather. Thus, it was legislated for them to present themselves in the best possible appearance, to avoid unpleasant odors among the congregants.