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/Avatar/V2/AvatarGiftsController.cs

@@ -50,7 +50,18 @@ public class AvatarGiftsController(
         return Ok(rows.Select(ToWire));
     }
 
-    public sealed record GenerateGiftRequest(int? GiftContext, bool? IsGameGift, int? AlternateGiftContext, string? Message);
+    /// <summary>Body keys are the client's AFGEDDANEKP param literals
+    /// (GiftContext / IsGameGift / AlternateGiftContext / Message). A class
+    /// with settable properties, not a positional record, because
+    /// <see cref="Binding.FormOrJsonModelBinder"/> constructs it empty and
+    /// fills it.</summary>
+    public sealed class GenerateGiftRequest
+    {
+        public int? GiftContext { get; set; }
+        public bool? IsGameGift { get; set; }
+        public int? AlternateGiftContext { get; set; }
+        public string? Message { get; set; }
+    }
 
     /// <summary>POST <c>api/avatar/v2/gifts/generate</c> — the end-of-
     /// activity gift box (chest). For a game/quest gift (IsGameGift) the
@@ -64,8 +75,13 @@ public class AvatarGiftsController(
     // POST 404'd, breaking reward chests on that path). Same request body.
     [HttpPost("api/avatar/v2/gifts/generate")]
     [HttpPost("api/avatar/v3/gifts/generate")]
+    // The client adds each field with AFGEDDANEKP (FFFIMAGLKEG.txt:1930-2013,
+    // POST = ordinal 2), which goes out form-urlencoded: a live trace showed
+    // `GiftContext=12000&IsGameGift=True&Message=…` answered 415 while this
+    // was [FromBody]. The form-or-JSON binder accepts either encoding.
     [Consumes("application/json", "application/x-www-form-urlencoded", "multipart/form-data")]
-    public async Task<IActionResult> Generate([FromBody] GenerateGiftRequest? req)
+    public async Task<IActionResult> Generate(
+        [ModelBinder(typeof(DorkNet.Server.Binding.FormOrJsonModelBinder))] GenerateGiftRequest? req)
     {
         var pid = this.RequireCurrentPlayerId();
         var isGameGift = req?.IsGameGift ?? false;