A 29-year-old G2P1 woman at 32 weeks' gestation presents with new-onset headache, visual disturbance, and right upper quadrant discomfort. Blood pressure is 162/104 mm Hg confirmed on repeat, and urinalysis shows 3+ protein. Platelets are 110 ×10⁹/L and ALT is mildly elevated. According to Canadian obstetric guidelines, what is the most appropriate initial management?