feat(ranking): stub /ranking/* (6 endpoints)

Rankings menu opens. Period picker shows deterministic monthly schedule.
Every leaderboard returns { period, ranking: [] }.

Endpoints:
- /ranking/get_viewable_ranking_period_list
- /ranking/master_point_{rotation,unlimited}_info
- /ranking/rank_match_class_win_{rotation,unlimited}_info
- /ranking/two_pick_win_info

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

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/ClassWinInfoRequestDto.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class ClassWinInfoRequestDto : BaseRequest
+{
+    [JsonPropertyName("period_id"), Key("period_id")]
+    public int PeriodId { get; set; }
+
+    [JsonPropertyName("class_id"), Key("class_id")]
+    public int ClassId { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/MasterPointInfoRequestDto.cs

@@ -0,0 +1,12 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class MasterPointInfoRequestDto : BaseRequest
+{
+    [JsonPropertyName("period_id"), Key("period_id")]
+    public int PeriodId { get; set; }
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/MasterPointPeriodEntryDto.cs

@@ -0,0 +1,11 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class MasterPointPeriodEntryDto : PeriodEntryDto
+{
+    [JsonPropertyName("necessary_score"), Key("necessary_score")]
+    public string NecessaryScore { get; set; } = "0";
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/MonthlyRankingResponseDto.cs

@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class MonthlyRankingResponseDto
+{
+    [JsonPropertyName("period"), Key("period")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public PeriodEntryDto Period { get; set; } = new();
+
+    [JsonPropertyName("ranking"), Key("ranking")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<RankingEntryDto> Ranking { get; set; } = new();
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/PeriodEntryDto.cs

@@ -0,0 +1,26 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+/// <summary>
+/// Base period-entry shape used by /ranking/get_viewable_ranking_period_list's
+/// rank_match[] and crossover_* arrays. Master-point and two-pick variants
+/// add fields — see <see cref="MasterPointPeriodEntryDto"/> and
+/// <see cref="TwoPickPeriodEntryDto"/>.
+/// </summary>
+[MessagePackObject]
+public class PeriodEntryDto
+{
+    [JsonPropertyName("id"), Key("id")]
+    public string Id { get; set; } = "0";
+
+    [JsonPropertyName("period_num"), Key("period_num")]
+    public string PeriodNum { get; set; } = "0";
+
+    [JsonPropertyName("begin_time"), Key("begin_time")]
+    public string BeginTime { get; set; } = "";
+
+    [JsonPropertyName("end_time"), Key("end_time")]
+    public string EndTime { get; set; } = "";
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/PeriodListResponseDto.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class PeriodListResponseDto
+{
+    // All required per spec; emit empty list, never null.
+    [JsonPropertyName("rank_match"), Key("rank_match")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<PeriodEntryDto> RankMatch { get; set; } = new();
+
+    [JsonPropertyName("master_point"), Key("master_point")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<MasterPointPeriodEntryDto> MasterPoint { get; set; } = new();
+
+    [JsonPropertyName("two_pick"), Key("two_pick")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<TwoPickPeriodEntryDto> TwoPick { get; set; } = new();
+
+    [JsonPropertyName("sealed"), Key("sealed")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<PeriodEntryDto> Sealed { get; set; } = new();
+
+    [JsonPropertyName("crossover_rank_match"), Key("crossover_rank_match")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<PeriodEntryDto> CrossoverRankMatch { get; set; } = new();
+
+    [JsonPropertyName("crossover_master_point"), Key("crossover_master_point")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.Never)]
+    public List<PeriodEntryDto> CrossoverMasterPoint { get; set; } = new();
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/RankingEntryDto.cs

@@ -0,0 +1,44 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+/// <summary>
+/// One row in a /ranking/* leaderboard's `ranking[]` array. Stub server never
+/// emits these; the type exists so the DTO compiles and so wire-shape tests can
+/// parse captured prod frames into it. Wire-type quirks (per capture frame 65):
+/// viewer_id/score/ranking_rank are STRINGS; rank/emblem_id/degree_id are NUMBERS.
+/// </summary>
+[MessagePackObject]
+public sealed class RankingEntryDto
+{
+    [JsonPropertyName("viewer_id"), Key("viewer_id")]
+    public string ViewerId { get; set; } = "0";
+
+    [JsonPropertyName("score"), Key("score")]
+    public string Score { get; set; } = "0";
+
+    [JsonPropertyName("ranking_rank"), Key("ranking_rank")]
+    public string RankingRank { get; set; } = "0";
+
+    [JsonPropertyName("name"), Key("name")]
+    public string Name { get; set; } = "";
+
+    [JsonPropertyName("country_code"), Key("country_code")]
+    public string CountryCode { get; set; } = "";
+
+    [JsonPropertyName("rank"), Key("rank")]
+    public int Rank { get; set; }
+
+    [JsonPropertyName("emblem_id"), Key("emblem_id")]
+    public long EmblemId { get; set; }
+
+    [JsonPropertyName("degree_id"), Key("degree_id")]
+    public long DegreeId { get; set; }
+
+    [JsonPropertyName("last_play_time"), Key("last_play_time")]
+    public string LastPlayTime { get; set; } = "";
+
+    [JsonPropertyName("guild_name"), Key("guild_name")]
+    public string GuildName { get; set; } = "";
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/TwoPickPeriodEntryDto.cs

@@ -0,0 +1,14 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class TwoPickPeriodEntryDto : PeriodEntryDto
+{
+    [JsonPropertyName("type"), Key("type")]
+    public string Type { get; set; } = "2";
+
+    [JsonPropertyName("over_460"), Key("over_460")]
+    public string Over460 { get; set; } = "1";
+}

SVSim.EmulatedEntrypoint/Models/Dtos/Ranking/TwoPickWinInfoRequestDto.cs

@@ -0,0 +1,12 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Ranking;
+
+[MessagePackObject]
+public sealed class TwoPickWinInfoRequestDto : BaseRequest
+{
+    [JsonPropertyName("period_id"), Key("period_id")]
+    public int PeriodId { get; set; }
+}