Don't write your own text editor. Just go pick TinyMCE or CKEditor, use their comment plugins and change tracking for your annotations, and wrap it up in whatever basic CRUD you want to make it into your app.
I know the phrase "build vs. buy" annoys people, but your use case is quite well solved by existing tools, so buy the hard parts and build the easy (CRUD) parts. If you succeed with a product, you can always re-build the editors later when it makes sense. (If it ever does.)
I know the phrase "build vs. buy" annoys people, but your use case is quite well solved by existing tools, so buy the hard parts and build the easy (CRUD) parts. If you succeed with a product, you can always re-build the editors later when it makes sense. (If it ever does.)