Please add a setting for any folder which if enabled, will push a notification on desktop and mobile when syncing is in progress with another device and when syncing is completed with another device.
Useful for knowing when someone you know is sharing files with you to be informed of incoming files.
This is something that an environment-specific wrapper would need to do. Syncthing itself cannot incorporate code for arbitrary notification mechanisms, but there is already an Event API which provides the necessary information. You could check with the various wrapper apps (SyncTrayzor on Windows e.g.) if they already provide such a notification, or but their developers to add it. Or even better, implement something yourself based on the Event API 