Assuming I've created an app that authenticates the user against api-v2, is there a method to get a token or cookie that I can pass to a browser instance set to load a stack exchange site that will auto log the authenticated user into the site?
Until the write API is complete, it seems the best method to allow my users to fully interact with stack exchange without leaving my app is to include a browser with custom CSS and javascript.
For the purposes of discussion, the app can be considered a native app on a mobile device.
Right now it looks like I would have to authenticate the user, then give them a browser window and allow them to authenticate again against the website, then look at the returned html to determine if they've logged into the same account, then store the relevant cookies and data.