[Bug] OIDC login option not shown on login page

[raihanameen]

Steps to reproduce

• Configure OIDC in Admin → OIDC (set provider name, client id, issuer, redirect URL, enable, save client secret).
• Visit /login as an unauthenticated user.

Expected

• A "Sign in with " (SSO/OIDC) button appears on the login page and clicking it starts the OIDC flow.