feat: 신규 플레이어 도움말 표시

- 처음 접속한 플레이어에게 환영 메시지 표시
- 기본 명령어 안내 (/도움말, /메뉴, /스폰)
- 단축키 안내 (Shift + F)

Essentials/src/main/kotlin/com/beemer/essentials/event/PlayerEvents.kt

@@ -5,6 +5,8 @@ import com.beemer.essentials.config.SpawnConfig
 import com.beemer.essentials.data.Location
 import com.beemer.essentials.util.ChatUtils
 import com.beemer.essentials.util.DimensionUtils
+import net.minecraft.ChatFormatting
+import net.minecraft.network.chat.Component
 import net.minecraft.server.level.ServerPlayer
 import net.neoforged.bus.api.SubscribeEvent
 import net.neoforged.neoforge.event.entity.player.PlayerEvent
@@ -35,9 +37,67 @@ object PlayerEvents {
             val level = DimensionUtils.getLevelById(player.server, spawn.dimension) ?: return
 
             player.teleportTo(level, spawn.x, spawn.y, spawn.z, player.yRot, player.xRot)
+
+            // 신규 플레이어 도움말 (약간의 딜레이 후 표시)
+            player.server.execute { sendWelcomeGuide(player) }
         }
     }
 
+    /** 신규 플레이어 도움말 */
+    private fun sendWelcomeGuide(player: ServerPlayer) {
+        val separator =
+                Component.literal("═══════════════════════════════").withStyle {
+                    it.withColor(ChatFormatting.DARK_AQUA)
+                }
+
+        player.sendSystemMessage(Component.empty())
+        player.sendSystemMessage(separator)
+        player.sendSystemMessage(
+                Component.literal("🎉 서버에 오신 것을 환영합니다!").withStyle {
+                    it.withColor(ChatFormatting.AQUA).withBold(true)
+                }
+        )
+        player.sendSystemMessage(Component.empty())
+
+        // 기본 명령어 안내
+        player.sendSystemMessage(
+                Component.literal("▸ 기본 명령어").withStyle {
+                    it.withColor(ChatFormatting.YELLOW).withBold(true)
+                }
+        )
+        sendGuideItem(player, "/도움말", "명령어 목록 보기")
+        sendGuideItem(player, "/메뉴", "메뉴 GUI 열기")
+        sendGuideItem(player, "/스폰", "스폰으로 이동")
+        player.sendSystemMessage(Component.empty())
+
+        // 단축키 안내
+        player.sendSystemMessage(
+                Component.literal("▸ 단축키").withStyle {
+                    it.withColor(ChatFormatting.YELLOW).withBold(true)
+                }
+        )
+        sendGuideItem(player, "Shift + F", "메뉴 GUI 열기")
+
+        player.sendSystemMessage(separator)
+        player.sendSystemMessage(Component.empty())
+    }
+
+    private fun sendGuideItem(player: ServerPlayer, key: String, desc: String) {
+        player.sendSystemMessage(
+                Component.literal("  ")
+                        .append(
+                                Component.literal(key).withStyle {
+                                    it.withColor(ChatFormatting.WHITE)
+                                }
+                        )
+                        .append(
+                                Component.literal(" - $desc").withStyle {
+                                    it.withColor(ChatFormatting.GRAY)
+                                }
+                        )
+        )
+    }
+
     @SubscribeEvent
     fun onPlayerLoggedOut(event: PlayerEvent.PlayerLoggedOutEvent) {
         val player = event.entity as? ServerPlayer ?: return
@@ -54,19 +114,23 @@ object PlayerEvents {
 
         val pos = oldPlayer.blockPosition()
         val dimension = oldPlayer.level().dimension().location().toString()
-        val biome = oldPlayer.level().getBiome(pos)
-            .unwrapKey()
-            .map { it.location().toString() }
-            .orElse("minecraft:plains")
+        val biome =
+                oldPlayer
+                        .level()
+                        .getBiome(pos)
+                        .unwrapKey()
+                        .map { it.location().toString() }
+                        .orElse("minecraft:plains")
 
-        val lastLoc = Location(
-            dimension = dimension,
-            biome = biome,
-            x = pos.x.toDouble(),
-            y = pos.y.toDouble(),
-            z = pos.z.toDouble()
-        )
+        val lastLoc =
+                Location(
+                        dimension = dimension,
+                        biome = biome,
+                        x = pos.x.toDouble(),
+                        y = pos.y.toDouble(),
+                        z = pos.z.toDouble()
+                )
 
         PlayerConfig.recordLastLocation(oldPlayer, lastLoc)
     }
-}
+}