A 28-year-old man from Delhi presents with a 2-week history of blurred vision, photophobia, and mild eye pain in the right eye. On examination, the visual acuity is 6/12. Slit-lamp shows fine keratic precipitates (KPs), anterior chamber reaction (3+ cells), and a granulomatous appearance with mutton-fat KPs. Fundoscopy reveals vitritis haze and multiple yellowish-white infiltrates at the posterior pole. Chest X-ray shows bilateral hilar lymphadenopathy. Serum calcium is elevated at 11.8 mg/dL. What is the most likely diagnosis?