Directed by Vasan Bala and starring Alia Bhatt, Jigra is an action thriller centered on the bond between a sister and her brother, but it struggles to deliver its emotional and narrative punch. While the premise is intriguing, the execution feels flat. The pacing drags in the first half, and by the time the action kicks in, the momentum is already lost. Alia Bhatt gives a decent performance, but even her efforts…