Improve NPC spawning logic to prioritize stable tiles and ensure valid spawn positions

Assets/Scripts/Infrastructure/Unity/GameBootstrap.cs

@@ -213,9 +213,22 @@ namespace Infrastructure.Unity
 
         private void SpawnNpc()
         {
-            var spawnPos = new Vector3(levelGenerator.GridSizeX / 2f, 7f, levelGenerator.GridSizeY / 2f);
+            var validTiles = _allTiles.FindAll(t => t.Floor == 0 && t.CurrentState == TileState.Stable);
+
+            if (validTiles.Count == 0)
+            {
+                validTiles = _allTiles.FindAll(t => t.CurrentState == TileState.Stable);
+            }
+
+            if (validTiles.Count == 0) return;
+
+            var randomTile = validTiles[Random.Range(0, validTiles.Count)];
+
+            if (!_tileViews.TryGetValue(randomTile.Id, out var tileView)) return;
+            if (!tileView) return;
+
+            var spawnPos = tileView.transform.position + Vector3.up * 5f;
             
-            // 30% chance for Hunter if player available
             if (_playerInstance && hunterNpcPrefab && Random.value < 0.3f)
             {
                 var hunter = Instantiate(hunterNpcPrefab, spawnPos, Quaternion.identity);