Lift NEXTCLOUD_PUBLIC_ISSUER_URL out of raw os.getenv reads into
Settings.nextcloud_public_issuer_url across all 8 production call sites
(app.py x2, oauth_routes.py x2, browser_oauth_routes.py,
provision_routes.py, userinfo_routes.py, elicitation.py). cli.py
remains the env-write source so the existing config-by-flag pipeline
still works.
Also addresses remaining PR #757 review nits:
- elicitation.py: align URL-present/absent wording on "open in your
browser" so users don't try clicking in the terminal
- test_scope_authorization_stored.py: lock in the deliberately-shared
fall-through branch with explicit declined/cancelled decorator tests
- test_elicitation.py: switch from monkeypatch.setenv to
patch(get_settings) since Settings is now the canonical surface
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
