Show confirmation modal when user initiates destructive operations (resource/tag removal)

The delete button deletes files without any confirmation. It's not that difficult to accidentally press and hold the delete button while the user isn't looking at the phone.
Should we show a modal instead and ask the user to confirm?

Start by locating the delete-button handlers for files, resources, and tags, then check whether the Android app already has a confirmation-modal pattern. Done means destructive removal waits for explicit confirmation, while cancelling leaves the item unchanged.

Written by the indexing model from the issue text.