Entertainment news is marked by sudden loss and public reckonings. Former 49ers star Aldon Smith has died at 36, with San Francisco calling his passing sudden and tragic as tributes revisit both his dazzling 2012 All-Pro peak and a career repeatedly interrupted by legal troubles and suspensions. Music fans are also mourning Oliver Tree, the flamboyant, viral singer behind “Life Goes On,” who was reported killed at 32 in a mid-air helicopter collision over Rio de Janeiro that left no survivors. In Hollywood, Seth Rogen has drawn a firm line on his past, saying he has no plans to work with James Franco again and that the two have not spoken in a long time, underscoring the lasting fallout from misconduct allegations that reshaped their once-close creative partnership.