feat(battle-node): relay uList on PvP PlayActions

Forwards the sender's deck-sourced summons/fetches to the opponent
(closes the spin-independent slice of direct-to-field summons). uList
coexists with the synthesized knownList in the same frame.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SVSim.BattleNode/Protocol/Bodies/PlayActionsBroadcastBody.cs

@@ -7,13 +7,15 @@ namespace SVSim.BattleNode.Protocol.Bodies;
 /// the deterministic-turn slice). <c>OppoTargetList</c> is the renamed <c>targetList</c>
 /// (independent of KnownList — a targeted hand play carries both). <c>KeyAction</c> forwards a
 /// choice/Discover play's <c>{type,cardId}</c> so the opponent renders the choice-token generation;
-/// the pick (<c>selectCard</c>) is stripped for a hidden (open:0) draw-to-hand choice. All three are
+/// the pick (<c>selectCard</c>) is stripped for a hidden (open:0) draw-to-hand choice. <c>UList</c>
+/// forwards the sender's unapproved-movement list (deck-sourced summons/fetches) verbatim. All are
 /// omitted when null via the envelope's WhenWritingNull policy (a vanilla play carries none).</summary>
 public sealed record PlayActionsBroadcastBody(
     [property: JsonPropertyName("playIdx")] int PlayIdx,
     [property: JsonPropertyName("type")] int Type,
     [property: JsonPropertyName("knownList")] IReadOnlyList<KnownCardEntry>? KnownList,
     [property: JsonPropertyName("oppoTargetList")] IReadOnlyList<OppoTargetEntry>? OppoTargetList,
+    [property: JsonPropertyName("uList")] IReadOnlyList<UnapprovedCardEntry>? UList = null,
     [property: JsonPropertyName("keyAction")] IReadOnlyList<KeyActionEntry>? KeyAction = null) : IMsgBody;
 
 /// <summary>Opponent-facing keyAction entry for a choice/Discover play. <c>type</c>/<c>cardId</c>