Mirror the taiga/pixelfed pattern: `playwright.spec.js` shrinks from a
834-LOC monolith to a 28-LOC orchestrator that wires `beforeEach` and
require()s one test module per scenario; all shared env, locator,
modal, login/logout and Talk-admin verification logic moves to
`_shared.js`. Each test stays atomar and individually inspectable via
its filename.
Login coverage is now persona × flavor instead of one monolithic
"nextcloud login" that implicitly assumed OIDC:
- test-login-admin-oidc.js skip \!oidcEnabled
- test-login-admin-native.js skip oidcEnabled (uses
NEXTCLOUD_DIRECT_LOGIN_PASSWORD
via the shared
login helper)
- test-login-biber-oidc.js skip \!oidcEnabled
- test-login-biber-ldap.js skip oidcEnabled || \!ldapEnabled (biber is
not autoprovisioned
in pure-native NC)
Persona scenarios (guest / biber / administrator post-login flows) keep
delegating to the shared `runGuestFlow` / `runBiberFlow` / `runAdminFlow`
helpers and stay universal across all variants.
Also drops an unused helper (`enterNextcloudLoginThroughVisibleEntryPoint`)
that the deleted always-on `test-nextcloud-login.js` was the only
consumer of.
