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/Controllers/API/PlayerWarnings/PlayerWarningsController.cs

@@ -48,14 +48,18 @@ public class PlayerWarningsController(DorkNetDbContext db) : ControllerBase
             .Where(p => p.Id == me)
             .Select(p => (bool?)(p.IsAdmin || p.IsDeveloper || p.IsCommunityTeam))
             .FirstOrDefaultAsync();
+        // Both calls are read as DJMHAFPGLLN = {Success, Error} (the formatter,
+        // RecNet.Runtime/LMCCNLLHLCJ.txt:191-218, knows no "Message" key). A
+        // failure without Error reached Promise.Rejected(null) and threw
+        // "Error message cannot be null" instead of showing the reason.
         if (moderator != true)
-            return Ok(new { Success = false, Message = "not_authorized" });
+            return Ok(new { Success = false, Error = "not_authorized", Message = "not_authorized" });
 
         var target = warnedPlayerId
                      ?? (long.TryParse(Request.Query["WarnedPlayerId"].FirstOrDefault(), out var q) ? q : 0);
-        if (target <= 0) return Ok(new { Success = false, Message = "missing_player" });
+        if (target <= 0) return Ok(new { Success = false, Error = "missing_player", Message = "missing_player" });
         if (!await db.Players.AnyAsync(p => p.Id == target))
-            return Ok(new { Success = false, Message = "player_not_found" });
+            return Ok(new { Success = false, Error = "player_not_found", Message = "player_not_found" });
 
         // Same "warning:{id}|message|category|createdAt|acknowledged" layout the
         // GET list handler parses in ToWarningWire.
@@ -75,7 +79,7 @@ public class PlayerWarningsController(DorkNetDbContext db) : ControllerBase
                 "false"),
         });
         await db.SaveChangesAsync();
-        return Ok(new { Success = true, Message = string.Empty, WarningId = id });
+        return Ok(new { Success = true, Error = string.Empty, Message = string.Empty, WarningId = id });
     }
 
     /// <summary>The 2023-03-21 client's acknowledge call takes NO arguments —
@@ -104,19 +108,19 @@ public class PlayerWarningsController(DorkNetDbContext db) : ControllerBase
                 .OrderByDescending(s => s.Id)
                 .ToListAsync();
             row = rows.FirstOrDefault(s => !ToWarningWire(s).Acknowledged);
-            if (row is null) return Ok(new { Success = true, Message = string.Empty });
+            if (row is null) return Ok(new { Success = true, Error = string.Empty, Message = string.Empty });
         }
         else
         {
             row = await db.PlayerSettings
                 .FirstOrDefaultAsync(s => s.PlayerId == me && s.Key == $"warning:{id}");
-            if (row is null) return Ok(new { Success = true, Message = string.Empty });
+            if (row is null) return Ok(new { Success = true, Error = string.Empty, Message = string.Empty });
         }
 
         var parts = row.Value.Split('|');
         row.Value = string.Join('|', parts.Take(3).Append("true"));
         await db.SaveChangesAsync();
-        return Ok(new { Success = true, Message = string.Empty, WarningId = row.Key["warning:".Length..] });
+        return Ok(new { Success = true, Error = string.Empty, Message = string.Empty, WarningId = row.Key["warning:".Length..] });
     }
 
     private static WarningWire ToWarningWire(DorkNet.Server.Data.Entities.PlayerSettingEntity row)