fix: use PgnExporter for SAN pgn field, fix status priority in GameMapper

modules/backcore/src/main/scala/de/nowchess/backcore/game/GameMapper.scala

@@ -4,6 +4,7 @@ import de.nowchess.api.board.Color
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
 import de.nowchess.backcore.dto.*
 import de.nowchess.io.fen.FenExporter
+import de.nowchess.io.pgn.PgnExporter
 import de.nowchess.rules.sets.DefaultRules
 
 object GameMapper:
@@ -51,9 +52,9 @@ object GameMapper:
 
   private def computeLiveStatus(session: GameSession): (String, Option[String]) =
     val ctx = session.context
-    if session.drawOfferedBy.isDefined then ("drawOffered", None)
+    if DefaultRules.isCheck(ctx) then ("check", None)
+    else if session.drawOfferedBy.isDefined then ("drawOffered", None)
     else if DefaultRules.isFiftyMoveRule(ctx) then ("fiftyMoveAvailable", None)
-    else if DefaultRules.isCheck(ctx) then ("check", None)
     else ("started", None)
 
   def moveToUci(move: Move): String =
@@ -69,7 +70,5 @@ object GameMapper:
       case _ => base
 
   private def buildPgn(moves: List[Move]): String =
-    moves.zipWithIndex.map { (move, i) =>
-      val prefix = if i % 2 == 0 then s"${i / 2 + 1}. " else ""
-      prefix + moveToUci(move)
-    }.mkString(" ")
+    // Use PgnExporter with no headers to get move-text only (SAN notation)
+    PgnExporter.exportGame(Map.empty, moves)