feat: 整数座標の補正

src/main/kotlin/net/hareworks/on_join_spawn/App.kt

@@ -26,7 +26,19 @@ class App : JavaPlugin(), Listener {
         }
 
         // Get the world's spawn location
-        val spawnLocation = player.world.spawnLocation
+        val spawnLocation = player.world.spawnLocation.clone()
+        
+        // Add 0.5 to X and Z coordinates if they are whole numbers
+        // This centers the player on the block
+        val x = spawnLocation.x
+        val z = spawnLocation.z
+        
+        if (x == x.toInt().toDouble()) {
+            spawnLocation.x = x + 0.5
+        }
+        if (z == z.toInt().toDouble()) {
+            spawnLocation.z = z + 0.5
+        }
         
         // Teleport player to spawn immediately
         // This happens before the player is fully loaded into the world