Add votes-final flag, warn on missing votes, and sync phases with results toggle

Domain/Player.cs

@@ -21,6 +21,7 @@ public class Player
     public DateTimeOffset? LastLoginAt { get; set; }
     public bool IsAdmin { get; set; }
     public Phase CurrentPhase { get; set; } = Phase.Suggest;
+    public bool VotesFinal { get; set; }
 
     public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;