Tina did not quit...if not alive jhanvi will be there as ghost at least :P ..but as trendsetter said akarshvi have remarried n jhanvi is back with ms...so there may be some twist...
I misjudged seeing the red sari pic where she wore mangalsutra (Pavitra punia aka Chandrika posted it in her twitter stories, the look which tinaa had when jhanvi was being burnt) as her newly wed bride look but that was her death bed look.
But there was article that Akarsh will try to make jhanvi alive again using her asthiya with his magic, also offscreen segment they showed prachi saving Jhanvi's asthiya from Chandrika.
Their reunion, no idea they will remarry them or not. But Tinaa is shooting as she posted sets stories and Aashka (Satrupa) too posted a story of coffee that Tinaa made for her on sets. They are currently shooting some party track. Mohit posted his look and Tinaa posted the set's decoration pic in her stories. So Tinaa ofcourse hasn't quited especially when the show is ending and also the channel/show wont end her character as she is the female lead. They might bring reincarnation track (its pretty much easy as AKarsh is supernaturally powerful person and may be just show jhanvi's rebirth) or just like they always make mockery of death, make her alive using her asthiya.
The further track they said in an article would focus on Satrupa manipulating HArsh and he on Daayan's side to make dayaan help his wife come back. SO might be AKarsh with his super powers only made Jhanvi alive again.