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.Server/Services/ConfigService.cs

@@ -102,7 +102,7 @@ public class ConfigService(IConfiguration config, DomainConfig domain)
         foreach (var (service, sub) in ServiceSubdomains)
         {
             var host = string.IsNullOrEmpty(sub) ? apex : $"{sub}.{apex}";
-            map[service] = $"https://{host}";
+            map[service] = $"https://{host}/";
         }
         return map;
     }
@@ -115,12 +115,21 @@ public class ConfigService(IConfiguration config, DomainConfig domain)
             if (domain.SingleOriginEnabled)
             {
                 var prefix = string.IsNullOrEmpty(sub) ? "www" : sub;
-                map[service] = $"{domain.SingleOriginBaseUrl}/__dn/{prefix}";
+                map[service] = $"{domain.SingleOriginBaseUrl}/__dn/{prefix}/";
                 continue;
             }
             var host = string.IsNullOrEmpty(sub) ? domain.Apex : domain.Sub(sub);
-            map[service] = domain.Url(host);
+            map[service] = EnsureTrailingSlash(domain.Url(host));
         }
         return map;
     }
+
+    // The 2018.06 client builds every API URL by RAW string concat —
+    // new Uri(string.Concat(serviceBase, "api/config/v2")) — so each service
+    // base MUST be an absolute origin ending in '/', else the host glues to
+    // the path ("https://api.apexapi/config/v2") and every call 404s. The
+    // 2020 client runs EnsureEndsWith('/') on these values itself, so the
+    // trailing slash is idempotent there — safe for both eras.
+    private static string EnsureTrailingSlash(string url)
+        => url.EndsWith('/') ? url : url + "/";
 }

DorkNet.Server/Services/PlayerService.cs

@@ -632,6 +632,15 @@ public class PlayerService(DorkNetDbContext db, RoomService rooms, ILogger<Playe
     public async Task<PlayerEntity?> GetByIdAsync(long id) =>
         await db.Players.Include(p => p.Avatar).FirstOrDefaultAsync(p => p.Id == id);
 
+    /// <summary>Bulk profile fetch for the 2018 client's batch resolvers
+    /// (api/players/v1/list, presence). Single query; order is not guaranteed.</summary>
+    public async Task<List<PlayerEntity>> GetByIdsAsync(IEnumerable<long> ids)
+    {
+        var idList = ids.Distinct().ToList();
+        if (idList.Count == 0) return [];
+        return await db.Players.Where(p => idList.Contains(p.Id)).ToListAsync();
+    }
+
     /// <summary>
     /// Stamp the calling platform onto an existing account so the
     /// next boot's <c>/cachedlogin/forplatformid</c> query finds it.

DorkNet.Server/Services/RoomService.cs

@@ -839,37 +839,13 @@ public class RoomService(DorkNetDbContext db)
     }
 
     /// <summary>
-    /// Project a RoomEntity to the wire shape Room.Deserialize at RVA
-    /// 0x114E430 expects. Required keys (PascalCase):
-    ///   RoomId, Name, Description, CreatorPlayerId, ImageName, State,
-    ///   Accessibility, SupportsLevelVoting, IsAGRoom, CloningAllowed,
-    ///   SupportsScreens, SupportsWalkVR, SupportsTeleportVR,
-    ///   AllowsJuniors, RoomWarningMask, CustomRoomWarning
-    /// Optional: IsDormRoom, SupportsVRLow, SupportsMobile, DisableMicAutoMute.
+    /// Project a RoomEntity to the flat June-2018 wire room (RecNet
+    /// Room.Deserialize, RecNet.cs:78244). This branch is 2018-only, so every
+    /// room-returning endpoint emits this shape via the shared mapper — the
+    /// 2020 RoomDetails/Scenes shape crashes the 2018 deserializer. See
+    /// <see cref="Compat2018.Room2018Mapper"/>.
     /// </summary>
-    public static object ToWireRoom(RoomEntity r) => new
-    {
-        RoomId = r.Id,
-        Name = r.Name,
-        Description = r.Description,
-        CreatorPlayerId = r.CreatorPlayerId,
-        ImageName = r.ImageName,
-        State = r.State,
-        Accessibility = r.Accessibility,
-        SupportsLevelVoting = r.SupportsLevelVoting,
-        IsAGRoom = r.IsAGRoom,
-        IsDormRoom = r.IsDormRoom,
-        CloningAllowed = r.CloningAllowed,
-        SupportsVRLow = r.SupportsVRLow,
-        SupportsMobile = r.SupportsMobile,
-        SupportsScreens = r.SupportsScreens,
-        SupportsWalkVR = r.SupportsWalkVR,
-        SupportsTeleportVR = r.SupportsTeleportVR,
-        AllowsJuniors = r.AllowsJuniors,
-        RoomWarningMask = r.RoomWarningMask,
-        CustomRoomWarning = r.CustomRoomWarning,
-        DisableMicAutoMute = r.DisableMicAutoMute,
-    };
+    public static object ToWireRoom(RoomEntity r) => Compat2018.Room2018Mapper.From(r);
 
     /// <summary>
     /// Idempotent admin overrides applied AFTER SeedAsync. Keeps the seed