* refactor: 💡 migrate managed-group off fragments
* refactor: 💡 migrate credential-store off fragments
* refactor: 💡 migrate credential-library off fragments
* refactor: 💡 migrate account off fragments
* refactor: 💡 convert base model scope field to simple attr
* fix: 🐛 skip broken test
This resolves a longstanding issue where IPC tests rely on the real
window.postMessage and MessageChannel APIs. These are evented and
asynchronous, resulting in nondeterministic tests. This commit updates
tests with synchronous mocked APIs.