feat!: drop the backend-side elevation windows; password and passkey sessions share capabilities, passkeys guard what nodes verify; the trust page lists added and removed passkeys [CI]

backend/shared/MoShiro.Protocol/MoShiroErrors.cs

@@ -11,7 +11,6 @@ public static class MoShiroErrors
     public static readonly ErrorCode CsrfFailed = new("csrf_failed");
     public static readonly ErrorCode Forbidden = new("forbidden");
     public static readonly ErrorCode SitePrivate = new("site_private");
-    public static readonly ErrorCode ElevationRequired = new("elevation_required");
     public static readonly ErrorCode NotFound = new("not_found");
     public static readonly ErrorCode AgentNotFound = new("agent_not_found");
     public static readonly ErrorCode ProbeNotFound = new("probe_not_found");