The real tension here isn't the gift, it's the hierarchy. Indian office culture has one unspoken rule: the subordinate gifts the boss, and the "optional" part is not actually optional. Bade logon ko gift dena is loyalty signaling, not affection. Your boss knows this. You know this. Everyone watching knows this. The gift has to say "I respect the structure" without saying "please be nicer to me." Those two messages require different objects.
For someone who treats your Sunday evening like fair game, the safest gifting category is premium consumables. A quality tea or coffee selection reads as thoughtful but not personal, travels well to their home, and doesn't sit awkward on someone's desk the way decorative items do. Dry fruit and nut hampers work for similar reasons: they're shareable with the boss's family, which earns goodwill in the larger gharelu context without you having to know anything about that household. A quality writing instrument is the only "personal" category that holds up here because it signals professionalism, not closeness.
The trap is anything that implies the boss should slow down: scented candles, bath sets, a "mindfulness" book. You're essentially telling someone who emails at 11 PM to relax, and they will feel that subtext. Also avoid anything too personalized (monogrammed, photo-printed) since it tips from cultural obligation into visible investment, and that's when the Lafda Meter spikes. If the gift could be read as "I'm building this relationship on purpose," you've overshot.