feat(dto): TK2 common DTOs (entry/class/deck/candidate/results/reward)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/BattleResultsDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class BattleResultsDto
+{
+    /// <summary>Each entry is 0 (loss) or 1 (win). Native int array — matches capture.</summary>
+    [JsonPropertyName("result_list")] [Key("result_list")]
+    public List<int> ResultList { get; set; } = new();
+
+    [JsonPropertyName("win_count")] [Key("win_count")]
+    public int WinCount { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/CandidatePairDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class CandidatePairDto
+{
+    [JsonPropertyName("id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("id")]
+    public long Id { get; set; }
+
+    [JsonPropertyName("turn")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("turn")]
+    public int Turn { get; set; }
+
+    [JsonPropertyName("set_num")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("set_num")]
+    public int SetNum { get; set; }
+
+    [JsonPropertyName("card_id_1")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("card_id_1")]
+    public long CardId1 { get; set; }
+
+    [JsonPropertyName("card_id_2")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("card_id_2")]
+    public long CardId2 { get; set; }
+
+    [JsonPropertyName("is_selected")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("is_selected")]
+    public int IsSelected { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/ClassInfoDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class ClassInfoDto
+{
+    [JsonPropertyName("class_id_1")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("class_id_1")]
+    public int ClassId1 { get; set; }
+
+    [JsonPropertyName("class_id_2")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("class_id_2")]
+    public int ClassId2 { get; set; }
+
+    [JsonPropertyName("class_id_3")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("class_id_3")]
+    public int ClassId3 { get; set; }
+
+    [JsonPropertyName("selected_class_id")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("selected_class_id")]
+    public int SelectedClassId { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/DeckInfoDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class DeckInfoDto
+{
+    [JsonPropertyName("two_pick_entry_id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("two_pick_entry_id")]
+    public long TwoPickEntryId { get; set; }
+
+    [JsonPropertyName("class_id")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("class_id")]
+    public int ClassId { get; set; }
+
+    /// <summary>Native bool on the wire (NOT stringified — matches capture).</summary>
+    [JsonPropertyName("is_select_completed")] [Key("is_select_completed")]
+    public bool IsSelectCompleted { get; set; }
+
+    /// <summary>Native long[] (raw ints in capture). Parser does .ToInt(); emitting as numbers matches prod.</summary>
+    [JsonPropertyName("selected_card_ids")] [Key("selected_card_ids")]
+    public List<long> SelectedCardIds { get; set; } = new();
+
+    [JsonPropertyName("select_turn")] [Key("select_turn")]
+    public int SelectTurn { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/EntryInfoDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class EntryInfoDto
+{
+    [JsonPropertyName("id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("id")]
+    public long Id { get; set; }
+
+    [JsonPropertyName("viewer_id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("viewer_id")]
+    public long ViewerId { get; set; }
+
+    [JsonPropertyName("reward_schedule_id")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("reward_schedule_id")]
+    public int RewardScheduleId { get; set; }
+
+    [JsonPropertyName("challenge_id")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("challenge_id")]
+    public int ChallengeId { get; set; }
+
+    [JsonPropertyName("max_battle_count")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("max_battle_count")]
+    public int MaxBattleCount { get; set; }
+
+    [JsonPropertyName("leader_skin_id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("leader_skin_id")]
+    public long LeaderSkinId { get; set; }
+
+    [JsonPropertyName("is_retire")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("is_retire")]
+    public int IsRetire { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/RewardEntryDto.cs

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+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+/// <summary>
+/// One entry on the TK2 reward_list / rewards wire arrays. Matches the entry-response capture
+/// (reward_type int, reward_id int, reward_num string).
+/// </summary>
+[MessagePackObject]
+public class RewardEntryDto
+{
+    [JsonPropertyName("reward_type")] [Key("reward_type")]
+    public int RewardType { get; set; }
+
+    [JsonPropertyName("reward_id")] [Key("reward_id")]
+    public long RewardId { get; set; }
+
+    [JsonPropertyName("reward_num")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("reward_num")]
+    public int RewardNum { get; set; }
+}