Begin of the insertion

End of the insertion **As** an admin of an OpenProject installation
**I want to** easily setup an OAuth app for mobile apps
**so that** my users don‘t have to enter a client ID when setting up their mobile app.

**Acceptance criteria**

* Seed OAuth application for the use of mobile apps

* Seeding will also be run for existing installations

* Register non-confidential app (that means there is no secret) with predefined Application ID: `openprojectmobileapp`

* Allowed redirect URI: `openprojectmobileapp://oauth-callback`

* OAuth Application name: OpenProject Mobile App Begin of the insertion

End of the insertion Begin of the deletion



End of the deletion * Mark the seeded OAuth application as builtin, preventing its deletion or editing

* Allow enabling/disabling of OAuth application

* Enforce PKCE (https://github.com/doorkeeper-gem/doorkeeper/blob/main/CHANGELOG.md). Don't allow changing that value.