fix: presence, profile edits, outfit menu and RecNetResult writes for the 2023 client

Every change below was checked against the 2023-03-21 client disassembly;
file:line evidence is in the code comments and in
docs/recroom-2023-client-api-complete.md.

Presence
- matchmake/none means "online, in no room" (its only caller is
  TryGoToOfflineRoom, which ignores the reply). The server used to keep the
  old room or invent a dorm, so the next heartbeat looked out of sync and
  the client cancelled its load to chase that room.
- The join watchdog no longer clears presence 30 s into a long room load;
  it is a 3 minute backstop that drops the room only.
- One fan-out (PresenceBroadcastService) for every transition: deferred
  joins, matchmake/none, logout, failed joins, visibility changes, SignalR
  connect/disconnect. isOnline is sent on its own; pushes never go to the
  subject, because a self push moves the player.
- Online-status visibility (Public / Friends / Favorites / Appear offline)
  is stored and honoured by GET /player and by the live pushes.

Profile
- PUT account/me/{emoji,personalpronouns,identityflags,bannerimage} were
  404; added with the client's real form keys and persisted (new Players
  columns plus migration). Every account read now returns them, and edits
  push AccountUpdate to everyone.

Outfit menu
- Saved outfits kept OutfitSelectionsV2 and CustomAvatarItems, so loading a
  slot restores what was saved instead of a stale outfit.
- isCreationAllowedForAccount answers the {Success, Error} envelope the
  client parses; minPriceForPublicItem is a bare int; gifts/generate accepts
  form bodies; lockeditems returns the full owned-item shape; colourways no
  longer share their base item's AvatarItemId.

RecNetResult writes
- About 40 writes look status-only but parse the body as {Success, Error}.
  An empty 200 showed "Failed to ..." after the server applied the change,
  and a body without Success threw "Error message cannot be null". Clubs,
  announcements, keepsakes, comments/read, subscriptions, purchase offers
  and privacy settings now answer RecNetResult.
- Login token and device-code grants are real; remoteauth approves the
  device code; createlogintoken returns a bare string.
- New: incentivizedreferrals/referrals, account/bulk/{email,phone},
  GET strings, account/me/confirmphone, PlayMenuCarouselOrdering_1.
  Route inventory and coverage test extended to match.

README now describes the 2023 branch.

DorkNet.Server/Services/AccountDtos.cs

@@ -0,0 +1,46 @@
+using DorkNet.Models.Auth;
+using DorkNet.Server.Data.Entities;
+
+namespace DorkNet.Server.Services;
+
+/// <summary>
+/// Single projection from <see cref="PlayerEntity"/> to the account wire
+/// DTOs. Every account read (account/me, account/{id}, account/bulk,
+/// account/search, account/create) and the AccountUpdate /
+/// SelfAccountUpdate pushes go through here so a profile field written by
+/// one endpoint is visible on all of them — previously each call site built
+/// its own DTO and the 2023 profile fields were never emitted anywhere.
+/// </summary>
+public static class AccountDtos
+{
+    public static RecNetAccount Public(PlayerEntity p) => Fill(new RecNetAccount(), p);
+
+    public static RecNetSelfAccount Self(PlayerEntity p)
+    {
+        var a = Fill(new RecNetSelfAccount(), p);
+        a.Email = p.Email ?? string.Empty;
+        a.Phone = p.Phone ?? string.Empty;
+        a.Birthday = p.Birthday ?? new DateTime(2000, 1, 1);
+        a.JuniorState = p.IsJunior ? 1 : 0;
+        a.ParentAccountId = null;
+        return a;
+    }
+
+    private static T Fill<T>(T a, PlayerEntity p) where T : RecNetAccount
+    {
+        a.AccountId = (int)p.Id;
+        a.RawUsername = p.Username;
+        a.Username = p.Username;
+        a.DisplayName = string.IsNullOrWhiteSpace(p.DisplayName) ? p.Username : p.DisplayName;
+        a.ProfileImage = p.ProfileImageName ?? string.Empty;
+        a.TreatAsJunior = p.IsJunior;
+        a.HasBirthday = true;
+        a.Platforms = 1;
+        a.CreatedAt = p.CreatedAt;
+        a.DisplayEmoji = p.DisplayEmoji ?? string.Empty;
+        a.BannerImage = p.BannerImageName ?? string.Empty;
+        a.PersonalPronouns = p.PersonalPronouns;
+        a.IdentityFlags = p.IdentityFlags;
+        return a;
+    }
+}