## Description of the implemented changes
The changes were:
- [x] Bugfixing
- [x] New Feature
- [ ] Breaking Change
- [ ] Refactoring
This PR improves the join-request flow and presentation quality, fixes several data-display issues in join/join-request screens, and adds a usability improvement in global settings (directly opening the join link). It also includes dependency updates and changelog maintenance.
## What has been changed?
- Join form (`JoinLive`) now renders inputs based on actual field types (including checkbox/date/number/email behavior instead of generic text-only handling).
- Join form custom-field labels are resolved from configured custom fields (fallback remains safe if lookup fails).
- Join-request details page (`JoinRequestLive.Show`) now:
- resolves and shows custom field names instead of raw IDs,
- formats boolean-like values (`on/true/1`, `off/false/0`) as localized `Yes/No`,
- formats ISO date strings for better readability,
- keeps legacy field handling while improving output consistency.
- Join-request detail layout was improved semantically and visually (`dl/dt/dd` structure for label/value rows).
- Global settings page now includes an **Open** button for the join URL (`target="_blank"`, `rel="noopener noreferrer"`, ARIA label).
- Added/updated tests around:
- join field type rendering,
- custom field labels in join-request views,
- related auth/global-settings behavior.
- Updated translations (`default.pot`, `en`, `de`) for new UI strings.
- Updated dependencies/tooling (`mix.lock`, `mix.exs`, CI/renovate-related updates).
- Updated `CHANGELOG.md` entries for unreleased changes.
## Definition of Done
### Code Quality
- [x] No new technical depths
- [x] Linting passed
- [x] Documentation is added were needed
### Accessibility
- [x] New elements are properly defined with html-tags
- [x] Colour contrast follows WCAG criteria
- [x] Aria labels are added when needed
- [x] Everything is accessible by keyboard
- [x] Tab-Order is comprehensible
- [x] All interactive elements have a visible focus
### Testing
- [x] Tests for new code are written
- [ ] All tests pass
- [ ] axe-core dev tools show no critical or major issues
## Additional Notes
- Reviewer focus areas:
- `lib/mv_web/live/join_live.ex`: input type derivation and custom field lookup strategy (`authorize?: false` read path used intentionally for field metadata).
- `lib/mv_web/live/join_request_live/show.ex`: value-formatting logic (especially backward compatibility for legacy `form_data` payloads).
- `lib/mv_web/live/global_settings_live.ex`: external-link behavior and accessibility attributes.
- The branch also contains dependency update commits; please review lockfile and CI-related changes separately from functional join/join-request changes.
Reviewed-on: #492
Co-authored-by: Simon <s.thiessen@local-it.org>
Co-committed-by: Simon <s.thiessen@local-it.org>
## 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>
- Member field settings: required only from email + settings (no API override)
- Member resource validation: required fields from settings only
- Gettext: remove obsolete 'Required for Vereinfacht integration' string