feat: Add support for 2018 client API endpoints and data models

- Implemented new search endpoints for rooms to accommodate the 2018 client.
- Added support for retrieving room details and featured rooms in a format compatible with the 2018 client.
- Introduced new data models for login responses and player presence specific to the 2018 client.
- Created mappers to convert between internal entities and the 2018 wire formats for players and rooms.
- Updated existing storefront APIs to include versioned endpoints for the 2018 client.
- Enhanced the version controller to return dual-format responses for compatibility with both 2018 and 2020 clients.
- Refactored the configuration service to ensure trailing slashes in URLs for the 2018 client.

DorkNet.Models/Auth/Login2018.cs

@@ -0,0 +1,118 @@
+using System.Text.Json.Serialization;
+
+namespace DorkNet.Models.Auth;
+
+// ── June-2018 (build 20180621_EA) login wire shapes ──────────────────────────
+//
+// The 2018 client speaks a DIFFERENT login protocol than the 2019/2020 OAuth
+// flow the rest of DorkNet implements:
+//   • POST api/platformlogin/v1/{loginaccount,logincached,createaccount}
+//   • request body is a JSON object (Unity JsonUtility / LitJson), NOT form
+//   • response is the "login envelope" below, read by RecNet.cs:40014-40021
+//     via case-sensitive LitJson keys.
+//
+// Keys verified from the assembly's REAL (name-preserved) Deserialize methods
+// via dnlib — the obfuscated-name sibling methods are Beebyte decoys with
+// scrambled literals (see project_2018_mono_obfuscation memory).
+
+/// <summary>
+/// Login response envelope. RecNet login-response Deserialize (RecNet.cs:40016-40020)
+/// reads: Error (req string), Player (optional object), Token (req string),
+/// FirstLoginOfTheDay (req bool), AnalyticsSessionId (req long). Empty Error
+/// means success; a non-empty Error is shown to the user and aborts login.
+/// </summary>
+public class Login2018Response
+{
+    [JsonPropertyName("Error")]
+    public string Error { get; set; } = string.Empty;
+
+    [JsonPropertyName("Player")]
+    public Player2018? Player { get; set; }
+
+    [JsonPropertyName("Token")]
+    public string Token { get; set; } = string.Empty;
+
+    [JsonPropertyName("FirstLoginOfTheDay")]
+    public bool FirstLoginOfTheDay { get; set; }
+
+    [JsonPropertyName("AnalyticsSessionId")]
+    public long AnalyticsSessionId { get; set; }
+}
+
+/// <summary>
+/// 2018 player object embedded in the login envelope and returned bare from
+/// getcachedlogins. Keys + required/optional verified from RecNet.cs:64632-64667
+/// (RecNet.EEBPLECPEGD.Deserialize):
+///   REQUIRED (Util.GetKey throws if missing): Id, Username, DisplayName, XP,
+///     Level, RegistrationStatus, Developer, CanReceiveInvites, ProfileImageName,
+///     JuniorProfile, ForceJuniorImages, PendingJunior, HasBirthday.
+///   OPTIONAL: Bio (TryGetKey), AvoidJuniors (ContainsKey-guarded),
+///     PlayerReputation/PlatformId (GetObjectKey -> null ok; omitted here),
+///     GroupMemberships (ContainsKey-guarded; omitted).
+/// NOTE the 2018 client uses "Id" (not "AccountId") and "Developer" (not
+/// "IsDeveloper") — distinct from the 2020 PlayerProfile DTO.
+/// </summary>
+public class Player2018
+{
+    [JsonPropertyName("Id")]
+    public long Id { get; set; }
+
+    [JsonPropertyName("Username")]
+    public string Username { get; set; } = string.Empty;
+
+    [JsonPropertyName("DisplayName")]
+    public string DisplayName { get; set; } = string.Empty;
+
+    [JsonPropertyName("Bio")]
+    public string Bio { get; set; } = string.Empty;
+
+    [JsonPropertyName("XP")]
+    public int XP { get; set; }
+
+    [JsonPropertyName("Level")]
+    public int Level { get; set; } = 1;
+
+    // Obfuscated enum in the dump; not a gate (the client just stores it). 3 is
+    // the "fully registered" value used elsewhere; verify against a live client
+    // if the signup flow re-appears for an existing account.
+    [JsonPropertyName("RegistrationStatus")]
+    public int RegistrationStatus { get; set; } = 3;
+
+    [JsonPropertyName("Developer")]
+    public bool Developer { get; set; }
+
+    [JsonPropertyName("CanReceiveInvites")]
+    public bool CanReceiveInvites { get; set; } = true;
+
+    [JsonPropertyName("ProfileImageName")]
+    public string ProfileImageName { get; set; } = string.Empty;
+
+    [JsonPropertyName("JuniorProfile")]
+    public bool JuniorProfile { get; set; }
+
+    [JsonPropertyName("ForceJuniorImages")]
+    public bool ForceJuniorImages { get; set; }
+
+    [JsonPropertyName("PendingJunior")]
+    public bool PendingJunior { get; set; }
+
+    [JsonPropertyName("HasBirthday")]
+    public bool HasBirthday { get; set; }
+
+    [JsonPropertyName("AvoidJuniors")]
+    public bool AvoidJuniors { get; set; }
+}
+
+/// <summary>
+/// Generic 2018 success envelope {Success, Message} (RecNet EFDOILDKBFK) used by
+/// registeraccount (email attach) and other simple POSTs. Note the key is
+/// "Message" (not "error").
+/// </summary>
+public class SuccessMessage2018
+{
+    [JsonPropertyName("Success")]
+    public bool Success { get; set; }
+
+    [JsonPropertyName("Message")]
+    public string Message { get; set; } = string.Empty;
+}

DorkNet.Models/Config/RecRoomConfig.cs

@@ -50,13 +50,34 @@ public class RecRoomConfig
     [JsonPropertyName("DailyObjectives")]
     public List<List<DailyObjective>> DailyObjectives { get; set; } = DailyObjective.DefaultSets();
 
-    [JsonPropertyName("ConfigTable")]
+    // 2018.06 client (RecNet.OPOHNGAOCCD.Deserialize, RecNet.cs:9062-9068) reads
+    // ConfigTable as an ARRAY of {Key,Value} objects, NOT a JSON object map:
+    //   foreach elem in dict["ConfigTable"]: table[elem["Key"]] = elem["Value"]
+    // The 2020 client read it as an object — but this branch targets 2018, so we
+    // emit the array form. Keep the settable Dictionary for existing call sites
+    // (ConfigService.GetConfig populates it) and project to the wire array.
+    [JsonIgnore]
     public Dictionary<string, string> ConfigTable { get; set; } = [];
 
+    [JsonPropertyName("ConfigTable")]
+    public List<ConfigTableEntry> ConfigTableWire =>
+        ConfigTable.Select(kv => new ConfigTableEntry { Key = kv.Key, Value = kv.Value }).ToList();
+
     [JsonPropertyName("ServiceUrls")]
     public Dictionary<string, string> ServiceUrls { get; set; } = [];
 }
 
+// 2018 ConfigTable element shape: {"Key": "...", "Value": "..."} (PascalCase,
+// LitJson Util.GetKey<string>("Key"/"Value")).
+public class ConfigTableEntry
+{
+    [JsonPropertyName("Key")]
+    public string Key { get; set; } = string.Empty;
+
+    [JsonPropertyName("Value")]
+    public string Value { get; set; } = string.Empty;
+}
+
 public class PhotonConfig
 {
     [JsonPropertyName("AppId")]

DorkNet.Models/Players/Presence2018.cs

@@ -0,0 +1,21 @@
+using System.Text.Json.Serialization;
+
+namespace DorkNet.Models.Players;
+
+/// <summary>
+/// June-2018 presence record returned from POST api/presence/v2/list.
+/// Keys verified from RecNet.DBHHFILLFLC.Deserialize: PlayerId (long),
+/// IsOnline (bool), GameSession (optional object — null when the player is
+/// online but not in a session; the client null-checks it).
+/// </summary>
+public class Presence2018
+{
+    [JsonPropertyName("PlayerId")]
+    public long PlayerId { get; set; }
+
+    [JsonPropertyName("IsOnline")]
+    public bool IsOnline { get; set; }
+
+    [JsonPropertyName("GameSession")]
+    public object? GameSession { get; set; }
+}

DorkNet.Models/Rooms/Room2018.cs

@@ -0,0 +1,48 @@
+using System.Text.Json.Serialization;
+
+namespace DorkNet.Models.Rooms;
+
+/// <summary>
+/// Flat June-2018 room object. The 2018 client (RecNet Room.Deserialize,
+/// RecNet.cs:78244) reads these keys directly off the room JSON — there is NO
+/// 2020-style RoomDetails/Scenes wrapper; DataBlobName + PersonalDetails are
+/// embedded right here. Required keys throw (Util.GetKey) if missing, so every
+/// field below must be present except the genuinely-optional ones noted.
+///
+/// Notes:
+///  • CreatorPlayerId is read as an int client-side; all account ids fit int.
+///  • Date keys are ISO-8601 (client DateTimeParse.ParseISO8601). Use real
+///    dates, never year-9999 (overflow — see WireDates).
+///  • ActivityLevelId parse failure is a non-fatal warning client-side, so ""
+///    is safe for non-activity rooms.
+///  • CoOwners/Hosts are int arrays (empty ok); PersonalDetails is an optional
+///    object (null ok).
+/// </summary>
+public class Room2018
+{
+    [JsonPropertyName("RoomId")] public long RoomId { get; set; }
+    [JsonPropertyName("Name")] public string Name { get; set; } = string.Empty;
+    [JsonPropertyName("Description")] public string Description { get; set; } = string.Empty;
+    [JsonPropertyName("CreatorPlayerId")] public long CreatorPlayerId { get; set; }
+    [JsonPropertyName("ImageName")] public string ImageName { get; set; } = string.Empty;
+    [JsonPropertyName("DataBlobName")] public string DataBlobName { get; set; } = string.Empty;
+    [JsonPropertyName("ActivityLevelId")] public string ActivityLevelId { get; set; } = string.Empty;
+    [JsonPropertyName("IsSandbox")] public bool IsSandbox { get; set; }
+    [JsonPropertyName("Instanced")] public bool Instanced { get; set; } = true;
+    [JsonPropertyName("MaxPlayers")] public int MaxPlayers { get; set; } = 20;
+    [JsonPropertyName("Accessibility")] public int Accessibility { get; set; } = 1;
+    [JsonPropertyName("AccessibilityLocked")] public bool AccessibilityLocked { get; set; }
+    [JsonPropertyName("VisitorCount")] public int VisitorCount { get; set; }
+    [JsonPropertyName("VisitCount")] public int VisitCount { get; set; }
+    [JsonPropertyName("CheerCount")] public int CheerCount { get; set; }
+    [JsonPropertyName("ReportCount")] public int ReportCount { get; set; }
+    [JsonPropertyName("State")] public int State { get; set; }
+    [JsonPropertyName("StateModifiedAt")] public DateTime StateModifiedAt { get; set; }
+    [JsonPropertyName("CreatedAt")] public DateTime CreatedAt { get; set; }
+    [JsonPropertyName("ModifiedAt")] public DateTime ModifiedAt { get; set; }
+    [JsonPropertyName("LastVisitedAt")] public DateTime LastVisitedAt { get; set; }
+    [JsonPropertyName("DataModifiedAt")] public DateTime DataModifiedAt { get; set; }
+    [JsonPropertyName("CoOwners")] public List<int> CoOwners { get; set; } = [];
+    [JsonPropertyName("Hosts")] public List<int> Hosts { get; set; } = [];
+    [JsonPropertyName("PersonalDetails")] public object? PersonalDetails { get; set; }
+}