Iranians posting across social media platforms are elated that Iran and six world powers reached a historic nuclear deal Tuesday after almost a decade of negotiations. The agreement limits Iranian nuclear activity in exchange for billions of dollars in sanctions relief. Iranians are declaring online that the deal is a victory, posting ‎#IranWinsPeace in thousands of tweets and Instagram posts since Monday. “I hope that good days are waiting for us,” someone tweeted from Tehran, using the hashtag. “The Iranians showed that they are civilized and rational people.” Final talks in Vienna involved nearly three weeks of intense round-the-clock talks....