A 28-year-old man from rural Maharashtra presents with jaundice, dark urine, and abdominal pain for 5 days. He reports consuming water from a local well 3 weeks ago. On examination, he is afebrile, has hepatomegaly, and mild splenomegaly. Laboratory findings: ALT 2400 IU/L, AST 1800 IU/L, bilirubin 8.2 mg/dL, albumin 3.8 g/dL, PT normal. Serology shows anti-HAV IgM positive, anti-HAV IgG negative. Which of the following is the most likely diagnosis and the expected clinical course?