## Description of the implemented changes
The changes were:
- [x] Bugfixing
- [x] New Feature
- [ ] Breaking Change
- [x] Refactoring
**OIDC-only mode improvements and UX tweaks (success toasts, unauthenticated redirect).**
## What has been changed?
### OIDC-only mode (new feature)
- **Admin settings:** "Only OIDC sign-in" is an immediate toggle at the top of the OIDC section (no save button). Enabling it also turns off "Allow direct registration". When OIDC-only is on, the registration checkbox is disabled and shows a tooltip (DaisyUI `<.tooltip>`).
- **Backend:** Password sign-in is forbidden via Ash policy (`OidcOnlyActive` check). Password registration is blocked via validation `OidcOnlyBlocksPasswordRegistration`. New plug `OidcOnlySignInRedirect`: when OIDC-only and OIDC are configured, GET `/sign-in` redirects to the OIDC flow; GET `/auth/user/password/sign_in_with_token` is rejected with redirect + flash. `AuthController.success/4` also rejects password sign-in when OIDC-only.
- **Tests:** GlobalSettingsLive (OIDC-only UI), AuthController (redirect and password sign-in rejection), User authentication (register_with_password blocked when OIDC-only).
### UX / behaviour (no new feature flag)
- **Success toasts:** Success flash messages auto-dismiss after 5 seconds via JS hook `FlashAutoDismiss` and optional `auto_clear_ms` on `<.flash>` (used for success in root layout and `flash_group`).
- **Unauthenticated users:** Redirect to sign-in without the "You don't have permission to access this page" flash; that message is only shown to logged-in users who lack access. Logic in `LiveHelpers` and `CheckPagePermission` plug; test updated accordingly.
### Other
- Layouts: comment about unprocessed join-request count no longer uses "TODO" (Credo).
- Gettext: German translation for "Home" (Startseite); POT/PO kept in sync.
- CHANGELOG: Unreleased section updated with the above.
## Definition of Done
### Code Quality
- [x] No new technical depths
- [x] Linting passed
- [x] Documentation is added where needed (module docs, comments where non-obvious)
### Accessibility
- [x] New elements are properly defined with html-tags (labels, aria-label on checkboxes)
- [x] Colour contrast follows WCAG criteria (unchanged)
- [x] Aria labels are added when needed (e.g. oidc-only and registration checkboxes)
- [x] Everything is accessible by keyboard (toggles and buttons unchanged)
- [x] Tab-Order is comprehensible
- [x] All interactive elements have a visible focus (existing patterns)
### Testing
- [x] Tests for new code are written (OIDC-only UI, auth controller, user auth; SMTP config builder and mailer)
- [x] All tests pass
- [ ] axe-core dev tools show no critical or major issues (not re-run for this PR; suggest spot-check on settings and sign-in)
## Additional Notes
- **OIDC-only:** When the `OIDC_ONLY` env var is set, the toggle is read-only and shows "(From OIDC_ONLY)". When OIDC is not configured, the toggle is disabled.
- **Invalidation:** Enabling OIDC-only sets `registration_enabled: false` in one update; disabling OIDC-only only updates `oidc_only` (registration left as-is).
- **Review focus:** Plug order in router (OidcOnlySignInRedirect), policy/validation order in User, and that all OIDC-only paths (form, plug, controller) stay consistent.
Reviewed-on: #474
Co-authored-by: Simon <s.thiessen@local-it.org>
Co-committed-by: Simon <s.thiessen@local-it.org>
- Rename AshAuthentication strategy from :oidc :rauthy to :oidc :oidc;
generated actions are now register_with_oidc / sign_in_with_oidc.
- Update config keys (:rauthy → :oidc) in dev.exs and runtime.exs.
- Update default_redirect_uri to /auth/user/oidc/callback everywhere.
- Rename Mv.Accounts helper functions accordingly.
- Update Mv.Secrets, AuthController, link_oidc_account_live and all tests.
- Update docker-compose.prod.yml, .env.example, README and docs.
IMPORTANT: OIDC providers must be updated to use the new redirect URI
/auth/user/oidc/callback instead of /auth/user/rauthy/callback.
- sign_in_with_rauthy after_action normalizes result (nil/struct/list) to list before Enum.each.
- OidcRoleSync.do_set_role uses Ash.update and swallows errors so auth is not blocked; skip update if role already correct.
- Use OidcRoleSyncContext for set_role_from_oidc_sync; document JWT peek risk.
- seed_admin without password sets Admin role on existing user (OIDC-only); update docs and test.
- Fix DE translation for 'access this page'; add get? true comment in User.
- sign_in_with_rauthy: get? true so Ash returns single user; pass oauth_tokens to OidcRoleSync.
- register_with_rauthy: pass oauth_tokens to OidcRoleSync; return {:ok, record} to preserve token.
Register and sign-in call apply_admin_role_from_user_info; users in configured
admin group get Admin role, others get Mitglied. Internal User action + bypass policy.
- Last-admin only when target role is non-admin (admins may switch admin roles).
- Use Ash.Changeset.get_attribute for new role_id. Tests: admin role switch, non-admin update_user role_id forbidden.
- Only cache non-nil role_id values to allow retry after role creation
- Prevents processes from being permanently stuck with nil if first call
happens before the 'Mitglied' role exists
- Update documentation to explain bootstrap safety mechanism
- Add database-level NOT NULL constraint for users.role_id
- Update SystemActor tests to verify NOT NULL constraint enforcement
- Add process dictionary caching for default_role_id/0 to reduce DB queries
Remove is_system_role from accept lists in create_role and update_role
actions. This field should only be set via seeds or internal actions to
prevent users from creating unkillable roles through the public API.
Previously, we'd rely on defaults for configuring user token
authentication. With these changes, we explicitly require
:session_identifier and :require_token_presence_for_authentication to be
configured in the application environment to make sure the system is
configured the way it should be.
