Add BackupKit and mid-game kit selection

Introduce a BackupKit and allow players holding it to change kits mid-game while preventing normal kits from being picked once the game started. Changes:
- Add BackupKit implementation (kit with no abilities/items used for mid-round kit selection).
- Update KitCommand: import BackupKit and GameState, add isIngame helper, disallow normal kit picks during INGAME/INVINCIBILITY, permit BackupKit to swap kits mid-game (but prevent picking the same kit) and apply playstyles accordingly.
- Fix GoblinKit to also copy/restore the target's playstyle when stealing a kit and restore the player's original playstyle after timeout.
- Tweak IceMageKit slow effect chance (now ~1/3 chance using random.nextInt(3) < 1).
- Update en_US.yml: add messages and kit strings for backup and icemage, adjust ability_charged color, and add game/cannot-pick messages.

Also includes small import and formatting adjustments.

src/main/kotlin/club/mcscrims/speedhg/command/KitCommand.kt

@@ -1,7 +1,9 @@
 package club.mcscrims.speedhg.command
 
 import club.mcscrims.speedhg.SpeedHG
+import club.mcscrims.speedhg.game.GameState
 import club.mcscrims.speedhg.kit.Playstyle
+import club.mcscrims.speedhg.kit.impl.BackupKit
 import club.mcscrims.speedhg.util.legacySerializer
 import club.mcscrims.speedhg.util.sendMsg
 import org.bukkit.command.Command
@@ -52,6 +54,30 @@ class KitCommand : CommandExecutor, TabCompleter {
 			return true
 		}
 
+		val playerKit = plugin.kitManager.getSelectedKit( player )
+		val isBackup = playerKit != null && playerKit is BackupKit
+
+		if ( !isBackup && isIngame() )
+		{
+			player.sendMsg("commands.kit.gameHasStarted")
+			return true
+		}
+		else if ( isBackup && isIngame() )
+		{
+			if ( kit is BackupKit )
+			{
+				player.sendMsg( "commands.kit.cannotPickSameKit" )
+				return true
+			}
+
+			plugin.kitManager.selectKit( player, kit )
+			plugin.kitManager.selectPlaystyle( player, playstyle )
+			plugin.kitManager.applyKit( player )
+
+			player.sendMsg( "commands.kit.selected", "playstyle" to playstyle.displayName, "kit" to legacySerializer.serialize( kit.displayName ))
+			return true
+		}
+
 		plugin.kitManager.selectKit( player, kit )
 		plugin.kitManager.selectPlaystyle( player, playstyle )
 
@@ -78,4 +104,10 @@ class KitCommand : CommandExecutor, TabCompleter {
 		return listOf()
 	}
 
+	private fun isIngame(): Boolean = when ( plugin.gameManager.currentState )
+	{
+		GameState.INGAME, GameState.INVINCIBILITY -> true
+		else                                      -> false
+	}
+
 }

src/main/kotlin/club/mcscrims/speedhg/kit/impl/BackupKit.kt

@@ -0,0 +1,85 @@
+package club.mcscrims.speedhg.kit.impl
+
+import club.mcscrims.speedhg.SpeedHG
+import club.mcscrims.speedhg.kit.Kit
+import club.mcscrims.speedhg.kit.Playstyle
+import club.mcscrims.speedhg.kit.ability.AbilityResult
+import club.mcscrims.speedhg.kit.ability.ActiveAbility
+import club.mcscrims.speedhg.kit.ability.PassiveAbility
+import net.kyori.adventure.text.Component
+import org.bukkit.Material
+import org.bukkit.entity.Player
+
+class BackupKit : Kit() {
+
+	private val plugin get() = SpeedHG.instance
+
+	override val id: String
+		get() = "backup"
+
+	override val displayName: Component
+		get() = plugin.languageManager.getDefaultComponent( "kits.backup.name", mapOf() )
+
+	override val lore: List<String>
+		get() = plugin.languageManager.getDefaultRawMessageList( "kits.backup.lore" )
+
+	override val icon: Material
+		get() = Material.CHEST
+
+	// ── Cached ability instances (avoid allocating per event call) ────────────
+	private val aggressiveNoActive  = NoActive( Playstyle.AGGRESSIVE )
+	private val defensiveNoActive   = NoActive( Playstyle.DEFENSIVE )
+	private val aggressiveNoPassive = NoPassive( Playstyle.AGGRESSIVE )
+	private val defensiveNoPassive  = NoPassive( Playstyle.DEFENSIVE )
+
+	// ── Playstyle routing ─────────────────────────────────────────────────────
+
+	override fun getActiveAbility(
+		playstyle: Playstyle
+	): ActiveAbility = when( playstyle )
+	{
+		Playstyle.AGGRESSIVE -> aggressiveNoActive
+		Playstyle.DEFENSIVE  -> defensiveNoActive
+	}
+
+	override fun getPassiveAbility(
+		playstyle: Playstyle
+	): PassiveAbility = when( playstyle )
+	{
+		Playstyle.AGGRESSIVE -> aggressiveNoPassive
+		Playstyle.DEFENSIVE  -> defensiveNoPassive
+	}
+
+	// ── Item distribution ─────────────────────────────────────────────────────
+
+	override fun giveItems( player: Player, playstyle: Playstyle ) {}
+
+	private class NoActive( playstyle: Playstyle ) : ActiveAbility( playstyle ) {
+
+		override val name: String
+			get() = "None"
+
+		override val description: String
+			get() = "None"
+
+		override val hitsRequired: Int
+			get() = 0
+
+		override val triggerMaterial: Material
+			get() = Material.BARRIER
+
+		override fun execute( player: Player ): AbilityResult { return AbilityResult.Success }
+
+	}
+
+	private class NoPassive( playstyle: Playstyle ) : PassiveAbility( playstyle ) {
+
+		override val name: String
+			get() = "None"
+
+		override val description: String
+			get() = "None"
+
+	}
+
+}

src/main/kotlin/club/mcscrims/speedhg/kit/impl/GoblinKit.kt

@@ -129,16 +129,17 @@ class GoblinKit : Kit() {
 			val lineOfSight = player.getTargetEntity( 3 ) as? Player
 				?: return AbilityResult.ConditionNotMet( "No player in line of sight" )
 
-			val targetKit = plugin.kitManager.getSelectedKit( lineOfSight )
+			val targetKit = plugin.kitManager.getSelectedKit( lineOfSight ) ?: return AbilityResult.ConditionNotMet( "Target has no kit" )
-				?: return AbilityResult.ConditionNotMet( "Target has no kit" )
+			val targetPlaystyle = plugin.kitManager.getSelectedPlaystyle( lineOfSight )
 
-			val currentKit = plugin.kitManager.getSelectedKit( player )
+			val currentKit = plugin.kitManager.getSelectedKit( player ) ?: return AbilityResult.ConditionNotMet( "Error while copying kit" )
-				?: return AbilityResult.ConditionNotMet( "Error while copying kit" )
+			val currentPlaystyle = plugin.kitManager.getSelectedPlaystyle( player )
 
 			activeStealTasks.remove( player.uniqueId )
 
 			plugin.kitManager.removeKit( player )
 			plugin.kitManager.selectKit( player, targetKit )
+			plugin.kitManager.selectPlaystyle( player, targetPlaystyle )
 			plugin.kitManager.applyKit( player )
 
 			val task = Bukkit.getScheduler().runTaskLater( plugin, { ->
@@ -148,6 +149,7 @@ class GoblinKit : Kit() {
 				{
 					plugin.kitManager.removeKit( player )
 					plugin.kitManager.selectKit( player, currentKit )
+					plugin.kitManager.selectPlaystyle( player, currentPlaystyle )
 					plugin.kitManager.applyKit( player )
 				}
 			}, 20L * 60)

src/main/kotlin/club/mcscrims/speedhg/kit/impl/IceMageKit.kt

@@ -184,7 +184,7 @@ class IceMageKit : Kit() {
 			victim: Player,
 			event: EntityDamageByEntityEvent
 		) {
-			if ( random.nextBoolean() )
+			if (random.nextInt( 3 ) < 1 )
 				victim.addPotionEffect(PotionEffect( PotionEffectType.SLOWNESS, 60, 0 ))
 		}
 

src/main/resources/languages/en_US.yml

@@ -48,6 +48,8 @@ commands:
     usage: '<red>Usage: /kit <kitName> <playstyle></red>'
     kitNotFound: '<red><kit> is not a registered kit!</red>'
     playstyleNotFound: '<red><playstyle> is not an available playstyle!</red>'
+    gameHasStarted: '<red>The game has already started. You cannot select a kit right now!</red>'
+    cannotPickSameKit: '<red>You cannot pick the same kit!</red>'
     selected: '<green>You have selected <kit> as your Kit with playstyle <playstyle>!</green>'
 
 scoreboard:
@@ -71,6 +73,17 @@ scoreboard:
     - "<yellow>play.mcscrims.club"
 
 kits:
+  backup:
+    name: '<gradient:gold:#ff841f>Backup</gradient>'
+    lore:
+      - ' '
+      - 'Select a kit mid-round at any time.'
+      - 'All kits are available to pick.'
+      - ' '
+      - 'PlayStyle: §e%playstyle%'
+      - ' '
+      - 'Left-click to select'
+      - 'Right-click to change playstyle'
   goblin:
     name: '<gradient:dark_green:gray><bold>Goblin</bold></gradient>'
     lore:
@@ -92,4 +105,23 @@ kits:
     messages:
       stole_kit: '<green>You have stolen the kit of your opponent (Kit: <kit>)!</green>'
       spawn_bunker: '<green>You have created a bunker around yourself!'
-      ability_charged: '<aqua>Your ability has been recharged!</aqua>'
+      ability_charged: '<yellow>Your ability has been recharged!</yellow>'
+  icemage:
+    name: '<gradient:dark_aqua:aqua>IceMage</gradient>'
+    lore:
+      - ' '
+      - 'Use your abilities to freeze players'
+      - 'or gain speed in ice biomes and slow'
+      - 'enemies.'
+      - ' '
+      - 'PlayStyle: §e%playstyle%'
+      - ' '
+      - 'Left-click to select'
+      - 'Right-click to change playstyle'
+    items:
+      snowball:
+        name: '§bFreeze'
+        description: 'Freeze your enemies by throwing snowballs in all directions'
+    messages:
+      shoot_snowballs: '<aqua>You have shot frozen snowballs in all directions!</aqua>'
+      ability_charged: '<yellow>Your ability has been recharged!</yellow>'