A 28-year-old woman from Delhi presents with jaundice, malaise, and right upper quadrant pain for 10 days. She is a healthcare worker with a needle-stick injury 6 weeks ago. Serology: HBsAg positive, anti-HBc IgM positive, HBeAg positive, HBV DNA 8.5 × 10⁶ IU/mL. ALT 3200 U/L, AST 2800 U/L, bilirubin 9.1 mg/dL, INR 1.2, albumin 3.6 g/dL. What is the most appropriate next step in management?