Well, if the current stability holds, here is my tally on the "12 day war":
Winner: Donald Trump. Established himself as the only player with any ability to shape the events in the region. I think he's fishing for a Nobel prize which probably influenced how he went about the conflict. Significant battlefield successes with no losses and no entanglement. I don't think he
truly accomplished much, but I also don't think this whole war accomplished much either. The showman did his thing, and I wouldn't be surprised if even the most reluctant MAGA supporters were pleased with the result.
Winner: Netanyahu. Clearly had the upper hand throughout the conflict and achieved tactical victory. As I said above, I don't think the war truly accomplished anything because I don't believe that Iran was about to build a nuclear bomb, and I don't think Iran posed any immediate threat to Israel with it's allies so battered. I see this mostly as a domestic audience performative war rather than something truly seeking strategic benefit.
Winner: Islamic Republic. They took a beating, but managed to keep swinging until the end, landing some serious hits on their arch nemesis, which is somewhat impressive considering the huge gulf in technology and equipment. The fact that the regime survived is a win for them, which is unfortunate.
Neutral: Israeli people. They definitely took some hits, but will come out of it just fine other than the continual degradation of their popularity/image on the world stage.
Loser: Iranian people. They took the brunt of the conflict, and will be no better of than they were before. Possibly worse off if the regime takes out their frustration on their own people under the guise of purging informants, which is a definite possibility.
Loser: China & Russia - They did not have much ability to shape the conflict, but they didn't try very hard, which brings me to...
edit: It should be said that Russian AA systems were completely ineffective against American aircraft in this conflict, which is also pretty bad news for Russia, and apparently
they are fairly concerned about it.
Biggest Loser: Europe - Frantic diplomacy that was utterly disregarded. I think Europe's stature as a world player takes a significant hit here. They completely failed to shape the events of the war despite trying pretty damn hard, and Trump danced on top of them to boot.