Server, but I have seen more than few files with similar issues.

Thanks for confirmation on styling!

I'm happy to agree here with Julian - Markdown is times better suited for most cases, IMO.
The only missing thing in the current editor - dynamic style transformation akin to http://dillinger.io/

I have read through guide on wiki, as well as jshint config,
but there are few differences between the project's code and guide lines.

Most noticeable are:

1. Oneliners a-la if(true) doSomething instead of if(true){doSomething}. This behavior makes jshint cry, while being presented all around the code. What about just disabling "curly"?
2. 'strict mode' is presented only on some files. Moreover, there are var definitions before scoped function, for example - categories.js. Is there a reason for it? I would rather think about putting everything in the function's body to be simple and logical way, but mb I'm missing something?