A 28-year-old woman from Delhi presents to the psychiatry outpatient department with her husband. She reports a 3-week episode of elevated mood, decreased need for sleep (sleeping only 2–3 hours per night but feeling fully rested), racing thoughts, and increased goal-directed activity. She has been working on multiple projects simultaneously and has spent ₹5 lakhs on unnecessary online shopping. Her husband notes she is more talkative than usual and easily irritated when interrupted. Two years ago, she had a depressive episode lasting 8 weeks that required hospitalization and antidepressant therapy. There is no history of psychotic symptoms during mood episodes. Mental status examination confirms pressured speech, flight of ideas, and psychomotor agitation. What is the most likely diagnosis?