Does anyone have any information on the following:
Once I download the content, can I safely remain offline indefinitely with my current downloaded version of the content?
What kind of action (to avoid) would cause me to lose my downloaded content when offline?
the app never deletes offline cache and files, so you should be able to use the offline data as long as you don't remove the data using the "Space usage" functionality.
Maybe if you are offline and you try to re-synchronise the site via the app settings you'll get an error, but it should not invalidate the offline data.
Good to know, thank you Juan!