Deck list work

SVSim.EmulatedEntrypoint/Models/Dtos/GatheringInfo.cs

@@ -3,10 +3,20 @@ using System.Text.Json.Serialization;
 
 namespace SVSim.EmulatedEntrypoint.Models.Dtos;
 
+/// <summary>
+/// gathering_info on /mypage/index — multiplayer-event participation state. Consumed by
+/// GatheringMyPageInfo ctor (TryGetValue-guarded) but emitted unconditionally to match prod and
+/// to keep post-parse UI consumers from reading nulls.
+/// </summary>
 [MessagePackObject]
 public class GatheringInfo
 {
     [JsonPropertyName("has_invite")]
     [Key("has_invite")]
     public int HasInvite { get; set; }
-}
+
+    /// <summary>Whether this viewer has entered the current gathering event. Per-viewer state — currently always 0.</summary>
+    [JsonPropertyName("is_entry")]
+    [Key("is_entry")]
+    public int IsEntry { get; set; }
+}