feat(battle-node): BuildMatched consumes MatchContext for player half

selfInfo cosmetics + 30-card selfDeck now read from MatchContext. Opponent
half stays in ScriptedProfiles. DummyCardId / BuildDummyDeck / PlayerMatched
Profile removed. Two new tests lock the deck-idx pairing and cosmetic
flow-through; TypedBodyWireShapeTests + lifecycle tests thread a fixture ctx.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs

@@ -1,3 +1,4 @@
+using SVSim.BattleNode.Bridge;
 using SVSim.BattleNode.Protocol;
 using SVSim.BattleNode.Protocol.Bodies;
 
@@ -9,29 +10,32 @@ namespace SVSim.BattleNode.Lifecycle;
 /// the dispatch pushes after the player's TurnEnd. The values are templated from the TK2
 /// captures at <c>data_dumps/captures/battle-traffic_tk2_regular.ndjson</c> — anything
 /// hardcoded here came from a real prod frame, with names + provenance in
-/// <see cref="ScriptedProfiles"/>.
+/// <see cref="ScriptedProfiles"/>. The player-half of Matched/BattleStart now reads from
+/// <see cref="MatchContext"/> instead of <see cref="ScriptedProfiles"/>.
 /// </summary>
 public static class ScriptedLifecycle
 {
-    /// <summary>
-    /// CardId used for all 30 entries in the dummy deck. A stable neutral card that exists in
-    /// every card-master version we care about, so the client can render it without
-    /// triggering a card-master-mismatch error.
-    /// </summary>
-    public const long DummyCardId = 100011010L;
-
     /// <summary>
     /// Viewer id we present as the opponent on every scripted push. Out-of-range vs. real
     /// viewer ids so it can't collide with a real account in the auth pipeline.
     /// </summary>
     public const long FakeOpponentViewerId = 999_999_999L;
 
-    public static MsgEnvelope BuildMatched(long playerViewerId, long opponentViewerId, string battleId) =>
+    public static MsgEnvelope BuildMatched(MatchContext ctx, long playerViewerId, long opponentViewerId, string battleId) =>
         EnvelopeForPush(NetworkBattleUri.Matched,
             new MatchedBody(
-                SelfInfo: ScriptedProfiles.PlayerMatchedProfile with { OppoId = opponentViewerId },
+                SelfInfo: new MatchedSelfInfo(
+                    CountryCode: ctx.CountryCode,
+                    UserName: ctx.UserName,
+                    SleeveId: ctx.SleeveId,
+                    EmblemId: ctx.EmblemId,
+                    DegreeId: ctx.DegreeId,
+                    FieldId: ctx.FieldId,
+                    IsOfficial: ctx.IsOfficial,
+                    OppoId: opponentViewerId,
+                    Seed: ScriptedProfiles.BattleSeed),
                 OppoInfo: ScriptedProfiles.OpponentMatchedProfile with { OppoId = playerViewerId },
-                SelfDeck: BuildDummyDeck()),
+                SelfDeck: BuildPlayerDeck(ctx.SelfDeckCardIds)),
             bid: battleId);
 
     public static MsgEnvelope BuildBattleStart(long playerViewerId) =>
@@ -104,12 +108,12 @@ public static class ScriptedLifecycle
         return list;
     }
 
-    private static IReadOnlyList<DeckCardRef> BuildDummyDeck()
+    private static IReadOnlyList<DeckCardRef> BuildPlayerDeck(IReadOnlyList<long> cardIds)
     {
-        var deck = new List<DeckCardRef>(30);
+        var deck = new List<DeckCardRef>(cardIds.Count);
-        for (var i = 1; i <= 30; i++)
+        for (var i = 0; i < cardIds.Count; i++)
         {
-            deck.Add(new DeckCardRef(Idx: i, CardId: DummyCardId));
+            deck.Add(new DeckCardRef(Idx: i + 1, CardId: cardIds[i]));
         }
         return deck;
     }

SVSim.BattleNode/Lifecycle/ScriptedProfiles.cs

@@ -15,18 +15,6 @@ internal static class ScriptedProfiles
     // From frame[2] (Matched).
     public const long BattleSeed = 17_548_138L;
 
-    // From frame[2] (Matched). OppoId is overwritten per battle from the bridge.
-    public static readonly MatchedSelfInfo PlayerMatchedProfile = new(
-        CountryCode: "KOR",
-        UserName: "Player",
-        SleeveId: "3000011",
-        EmblemId: "701441011",
-        DegreeId: "300003",
-        FieldId: 43,
-        IsOfficial: 0,
-        OppoId: 0,
-        Seed: BattleSeed);
-
     public static readonly MatchedOppoInfo OpponentMatchedProfile = new(
         CountryCode: "JPN",
         UserName: "Opponent",

SVSim.BattleNode/Sessions/BattleSession.cs

@@ -235,7 +235,7 @@ public sealed class BattleSession
                 Phase = BattleSessionPhase.AwaitingInitBattle;
                 break;
             case NetworkBattleUri.InitBattle when Phase == BattleSessionPhase.AwaitingInitBattle:
-                result.Add((ScriptedLifecycle.BuildMatched(ViewerId, ScriptedLifecycle.FakeOpponentViewerId, BattleId), NoStock: false));
+                result.Add((ScriptedLifecycle.BuildMatched(Context, ViewerId, ScriptedLifecycle.FakeOpponentViewerId, BattleId), NoStock: false));
                 Phase = BattleSessionPhase.AwaitingLoaded;
                 break;
             case NetworkBattleUri.Loaded when Phase == BattleSessionPhase.AwaitingLoaded:

SVSim.UnitTests/BattleNode/Lifecycle/ScriptedLifecycleTests.cs

@@ -1,4 +1,5 @@
 using NUnit.Framework;
+using SVSim.BattleNode.Bridge;
 using SVSim.BattleNode.Lifecycle;
 using SVSim.BattleNode.Protocol;
 using SVSim.BattleNode.Protocol.Bodies;
@@ -11,26 +12,61 @@ public class ScriptedLifecycleTests
     [Test]
     public void BuildMatched_PutsOppoIdInSelfInfoEqualToTheRealOpponentVid()
     {
-        var env = ScriptedLifecycle.BuildMatched(playerViewerId: 906243102, opponentViewerId: 847666884, battleId: "b");
+        var env = ScriptedLifecycle.BuildMatched(FixtureCtx(),
+            playerViewerId: 906243102, opponentViewerId: 847666884, battleId: "b");
 
         Assert.That(env.Uri, Is.EqualTo(NetworkBattleUri.Matched));
         var body = (MatchedBody)env.Body;
         Assert.That(body.SelfInfo.OppoId, Is.EqualTo(847666884L));
         Assert.That(body.OppoInfo.OppoId, Is.EqualTo(906243102L));
-
-        // Bid travels in the envelope, not the Body — protect against the reserved-keys regression.
         Assert.That(env.Bid, Is.EqualTo("b"));
-        // Typed bodies can't carry an envelope-level "bid" key by construction (no such property).
     }
 
     [Test]
     public void BuildMatched_ContainsThirtyCardSelfDeck()
     {
-        var env = ScriptedLifecycle.BuildMatched(1, 2, "b");
+        var env = ScriptedLifecycle.BuildMatched(FixtureCtx(), 1, 2, "b");
         var body = (MatchedBody)env.Body;
         Assert.That(body.SelfDeck.Count, Is.EqualTo(30));
     }
 
+    [Test]
+    public void BuildMatched_deck_idxs_pair_1to30_with_context_card_ids()
+    {
+        var draftedDeck = Enumerable.Range(1, 30).Select(i => 200_000_000L + i).ToList();
+        var env = ScriptedLifecycle.BuildMatched(FixtureCtx(draftedDeck), 1, 2, "b");
+        var body = (MatchedBody)env.Body;
+
+        for (int i = 0; i < 30; i++)
+        {
+            Assert.That(body.SelfDeck[i].Idx, Is.EqualTo(i + 1),
+                $"slot {i}: idx should be 1-based position");
+            Assert.That(body.SelfDeck[i].CardId, Is.EqualTo(200_000_000L + i + 1),
+                $"slot {i}: cardId should be the drafted card");
+        }
+    }
+
+    [Test]
+    public void BuildMatched_selfInfo_cosmetics_flow_from_context()
+    {
+        var ctx = FixtureCtx() with
+        {
+            CountryCode = "JPN", UserName = "Drafter", SleeveId = "999",
+            EmblemId = "888", DegreeId = "777", FieldId = 42, IsOfficial = 1,
+        };
+
+        var env = ScriptedLifecycle.BuildMatched(ctx, 1, 2, "b");
+        var body = (MatchedBody)env.Body;
+
+        Assert.That(body.SelfInfo.CountryCode, Is.EqualTo("JPN"));
+        Assert.That(body.SelfInfo.UserName, Is.EqualTo("Drafter"));
+        Assert.That(body.SelfInfo.SleeveId, Is.EqualTo("999"));
+        Assert.That(body.SelfInfo.EmblemId, Is.EqualTo("888"));
+        Assert.That(body.SelfInfo.DegreeId, Is.EqualTo("777"));
+        Assert.That(body.SelfInfo.FieldId, Is.EqualTo(42));
+        Assert.That(body.SelfInfo.IsOfficial, Is.EqualTo(1));
+    }
+
     [Test]
     public void BuildBattleStart_HasTurnStateZeroAndBattleTypeEleven()
     {
@@ -60,7 +96,6 @@ public class ScriptedLifecycleTests
     public void ComputeHandAfterSwap_SwapMiddleCard_ReplacesWithFreshDeckIdx()
     {
         var hand = ScriptedLifecycle.ComputeHandAfterSwap(new long[] { 2 });
-        // pos 0 keeps idx 1; pos 1 (was idx 2) gets next deck idx (4); pos 2 keeps idx 3.
         Assert.That(hand, Is.EqualTo(new long[] { 1, 4, 3 }));
     }
 
@@ -98,4 +133,11 @@ public class ScriptedLifecycleTests
         var body = (OpponentTurnStartBody)env.Body;
         Assert.That(body.Spin, Is.EqualTo(100));
     }
+
+    private static MatchContext FixtureCtx(IReadOnlyList<long>? deck = null) => new(
+        SelfDeckCardIds: deck ?? Enumerable.Range(1, 30).Select(i => 100_011_010L).ToList(),
+        ClassId: "1", CharaId: "1", CardMasterName: "card_master_node_10015",
+        CountryCode: "KOR", UserName: "Player", SleeveId: "3000011",
+        EmblemId: "701441011", DegreeId: "300003", FieldId: 43, IsOfficial: 0,
+        BattleType: 11);
 }

SVSim.UnitTests/BattleNode/Lifecycle/TypedBodyWireShapeTests.cs

@@ -1,5 +1,6 @@
 using System.Text.Json.Nodes;
 using NUnit.Framework;
+using SVSim.BattleNode.Bridge;
 using SVSim.BattleNode.Lifecycle;
 using SVSim.BattleNode.Protocol;
 
@@ -26,7 +27,7 @@ public class TypedBodyWireShapeTests
         // Matching.StartBattleLoad reads it back, and GetSelfDeck().Select(...) crashes
         // with "Value cannot be null. Parameter name: source". The prod wire format
         // emits envelope keys (uri first) before body keys; we must too.
-        var env = ScriptedLifecycle.BuildMatched(
+        var env = ScriptedLifecycle.BuildMatched(FixtureCtx(),
             playerViewerId: 1, opponentViewerId: 2, battleId: "b");
         var json = MsgEnvelope.ToJson(env);
 
@@ -44,7 +45,7 @@ public class TypedBodyWireShapeTests
     [Test]
     public void BuildMatched_SerializesAllWireKeysExpectedByTheClient()
     {
-        var env = ScriptedLifecycle.BuildMatched(
+        var env = ScriptedLifecycle.BuildMatched(FixtureCtx(),
             playerViewerId: 906243102, opponentViewerId: 847666884, battleId: "597830888107");
 
         var json = MsgEnvelope.ToJson(env);
@@ -156,4 +157,16 @@ public class TypedBodyWireShapeTests
         Assert.That(node["resultCode"]!.GetValue<int>(), Is.EqualTo(1));
         Assert.That(node["uri"]!.GetValue<string>(), Is.EqualTo("TurnStart"));
     }
+
+    /// <summary>
+    /// Wire-shape fixture: 30 copies of the legacy DummyCardId (100_011_010L) so the
+    /// existing literal assertions on <c>selfDeck[0].cardId</c> (line 81 above) keep working
+    /// after the MatchContext migration deletes the const.
+    /// </summary>
+    private static MatchContext FixtureCtx() => new(
+        SelfDeckCardIds: Enumerable.Range(1, 30).Select(_ => 100_011_010L).ToList(),
+        ClassId: "1", CharaId: "1", CardMasterName: "card_master_node_10015",
+        CountryCode: "KOR", UserName: "Player", SleeveId: "3000011",
+        EmblemId: "701441011", DegreeId: "300003", FieldId: 43, IsOfficial: 0,
+        BattleType: 11);
 }