read `ssoSubIds` in state.php from `api.json`
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## Summary by CodeRabbit
* **New Features**
* Added a new query to check if Single Sign-On (SSO) is enabled.
* Updated UI components to dynamically reflect SSO availability via live
data.
* **Refactor**
* Streamlined internal handling of SSO status detection for improved
reliability and maintainability.
* **Tests**
* Enhanced tests for SSO button behavior with mocked live data and added
edge case coverage for SSO callback handling.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **New Features**
- Added comprehensive unit tests for components including SsoButton,
ThemeSwitcher, UpdateOs, UserProfile, WanIpCheck, WelcomeModal,
ActivationModal, ActivationPartnerLogo, ActivationPartnerLogoImg, and
ActivationSteps.
- **Tests**
- Enhanced existing test suites for ColorSwitcher, DummyServerSwitcher,
and I18nHost to improve test isolation, DOM management, and reliability.
- **Style**
- Made minor typographic correction in ActivationModal description text.
- **Refactor**
- Reorganized import statements in several components for improved code
clarity.
- **Chores**
- Added necessary imports in multiple components to support Vue
Composition API features.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: mdatelle <mike@datelle.net>
Pujit Mehrotra