feat: sync monoforum and collectible emoji status

Sync telesrv bd15657 (feat(account): implement collectible emoji status).

Skipped telesrv docs changes per public sync rules.

internal/app/updates/service.go

@@ -593,6 +593,20 @@ func (s *Service) RecordContactsReset(ctx context.Context, stateAuthKeyID [8]byt
 	}, true, excludeSessionID)
 }
 
+// RecordUserEmojiStatus durably synchronizes an absolute emoji-status snapshot
+// to the account's other sessions and offline difference stream.
+func (s *Service) RecordUserEmojiStatus(ctx context.Context, stateAuthKeyID [8]byte, userID int64, status domain.UserEmojiStatus, excludeAuthKeyID [8]byte, excludeSessionID int64) (domain.UpdateEvent, domain.UpdateState, error) {
+	if !status.Valid() {
+		return domain.UpdateEvent{}, domain.UpdateState{}, domain.ErrStarGiftCollectibleInvalid
+	}
+	return s.recordEvent(ctx, stateAuthKeyID, excludeAuthKeyID, userID, domain.UpdateEvent{
+		Type:        domain.UpdateEventUserEmojiStatus,
+		Peer:        domain.Peer{Type: domain.PeerTypeUser, ID: userID},
+		EmojiStatus: status,
+		PtsCount:    1,
+	}, true, excludeSessionID)
+}
+
 // RecordDraftMessage 记录某会话云草稿变化（保存/清空都是同一事件——草稿是绝对
 // 状态，重放时按 peer 重载当前值）。updateDraftMessage 无 pts 字段，走 LacksWirePts
 // aux 簿记；topMsgID 是 forum 话题草稿键（复用 MaxID 列持久化）。

internal/app/updates/service_test.go

@@ -219,6 +219,35 @@ func TestRecordSettingsEventsFeedGetDifference(t *testing.T) {
 	}
 }
 
+func TestRecordCollectibleEmojiStatusFeedsDifference(t *testing.T) {
+	ctx := context.Background()
+	authKeyID := [8]byte{3, 1}
+	events := memory.NewUpdateEventStore()
+	svc := NewService(memory.NewUpdateStateStore(), events)
+	ownerUserID := int64(1000000001)
+	status := domain.UserEmojiStatus{
+		DocumentID: 71,
+		Collectible: domain.EmojiStatusCollectible{
+			CollectibleID: 91, DocumentID: 71, Title: "Gift", Slug: "Gift-1",
+			PatternDocumentID: 72, CenterColor: 1, EdgeColor: 2, PatternColor: 3, TextColor: 4,
+		},
+	}
+	event, state, err := svc.RecordUserEmojiStatus(ctx, authKeyID, ownerUserID, status, authKeyID, 42)
+	if err != nil {
+		t.Fatalf("RecordUserEmojiStatus: %v", err)
+	}
+	if event.Type != domain.UpdateEventUserEmojiStatus || event.Pts != 1 || state.Pts != 1 || !event.LacksWirePts() {
+		t.Fatalf("event/state = %+v / %+v", event, state)
+	}
+	diff, err := svc.GetDifference(ctx, authKeyID, ownerUserID, domain.UpdateState{})
+	if err != nil {
+		t.Fatalf("GetDifference: %v", err)
+	}
+	if len(diff.Events) != 1 || diff.Events[0].EmojiStatus != status || diff.Events[0].Peer.ID != ownerUserID {
+		t.Fatalf("difference = %+v, want exact collectible snapshot", diff)
+	}
+}
+
 func TestRecordSettingsEventUsesDispatchAppender(t *testing.T) {
 	ctx := context.Background()
 	authKeyID := [8]byte{4}