The 49ers are just settling into their offseason.San Francisco has advanced to the NFC Championship Game in all three seasons under coach Jim Harbaugh. They have lost twice and, last season, advanced to the Super Bowl. Moving forward, the objective will be winning a Super Bowl.Because this team has a big window, the next big thing for the 49ers is securing their long-term health. That means extending the contracts of Harbaugh and quarterback Colin Kaepernick this year.