**As** a mobile user
**I would like** to automatically get redirected to the mobile app from my phone email app when tapping on an email notification
**so that** I don't need to open it manually after the web app opening on a browser

**Acceptance criteria**

* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Make that the app opens by default in all devices if the application is installed.
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion The app should open directly in the activity tab of the work package the user taped on their email. The page should automatically scroll to display the activity that triggered the email notification.
* [ ] In case the user has tap on the buttons "See comment in notification centre" or "To notification centre" the app should open on the "Notifications" tab.
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion In case the user has tap on the button "Change email settings" the app should open on the "Account > Notification settings" page.
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion If the user is not logged in into any instance in the app display a toast message saying "Please, log in to your OpenProject instance to see this work package"
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Display an error message if the user is logged in a different instance in the mobile app than the one they received the email from. _(To be designed)_

**Technical notes**

* Submitting a PR with the necessary changes under `public/` is the first option to try this.