feat: Implement component dependency management for custom and vanilla data components.

src/main/kotlin/net/hareworks/hcu/items/api/component/CustomComponent.kt

@@ -1,5 +1,6 @@
 package net.hareworks.hcu.items.api.component
 
+import io.papermc.paper.datacomponent.DataComponentType
 import net.hareworks.hcu.items.api.Tier
 import org.bukkit.NamespacedKey
 import org.bukkit.inventory.ItemStack
@@ -10,6 +11,14 @@ interface CustomComponent {
     val maxTier: Int
     val minTier: Int
 
+    /** 依存する他のCustomComponent（NamespacedKeyで指定） */
+    val componentDependencies: List<NamespacedKey>
+        get() = emptyList()
+
+    /** 依存するバニラDataComponent（値なしフラグタイプ用） */
+    val dataComponentDependencies: List<DataComponentType.NonValued>
+        get() = emptyList()
+
     fun apply(item: ItemStack, tier: Tier? = null)
     fun has(item: ItemStack): Boolean
     fun remove(item: ItemStack)

src/main/kotlin/net/hareworks/hcu/items/command/CommandRegistrar.kt

@@ -161,7 +161,7 @@ object CommandRegistrar {
                                     return@executes
                                 }
                                 
-                                component.apply(item)
+                                ComponentRegistry.applyWithDependencies(component, item)
                                 sender.sendMessage("Applied component '${component.displayName}' to held item.")
                             }
                             integer("tier", min = 1, max = 100) {
@@ -190,7 +190,7 @@ object CommandRegistrar {
                                     }
                                     
                                     val tier = Tier.fromLevel(tierLevel)
-                                    component.apply(item, tier)
+                                    ComponentRegistry.applyWithDependencies(component, item, tier)
                                     sender.sendMessage("Applied component '${component.displayName}' (Tier ${tier.level}) to held item.")
                                 }
                             }

src/main/kotlin/net/hareworks/hcu/items/content/components/DoubleJumpComponent.kt

@@ -1,5 +1,7 @@
 package net.hareworks.hcu.items.content.components
 
+import io.papermc.paper.datacomponent.DataComponentType
+import io.papermc.paper.datacomponent.DataComponentTypes
 import net.hareworks.hcu.items.App
 import net.hareworks.hcu.items.api.Tier
 import net.hareworks.hcu.items.api.component.AbstractComponent
@@ -20,6 +22,9 @@ class DoubleJumpComponent(private val plugin: App) : AbstractComponent(plugin, "
     override val displayName: String = "Double Jump"
     override val maxTier: Int = 3
 
+    override val dataComponentDependencies: List<DataComponentType.NonValued>
+        get() = listOf(DataComponentTypes.GLIDER)
+
     override fun apply(item: ItemStack, tier: Tier?) {
         if (isBoots(item.type)) {
             super.apply(item, tier)

src/main/kotlin/net/hareworks/hcu/items/registry/ComponentRegistry.kt

@@ -1,7 +1,9 @@
 package net.hareworks.hcu.items.registry
 
+import net.hareworks.hcu.items.api.Tier
 import net.hareworks.hcu.items.api.component.CustomComponent
 import net.hareworks.hcu.items.api.component.EquippableComponent
+import org.bukkit.inventory.ItemStack
 
 object ComponentRegistry {
     private val components = mutableMapOf<org.bukkit.NamespacedKey, CustomComponent>()
@@ -17,4 +19,27 @@ object ComponentRegistry {
     fun getEquippableComponents(): List<EquippableComponent> {
         return components.values.filterIsInstance<EquippableComponent>()
     }
+
+    /**
+     * コンポーネントを依存関係を解決しながら適用する
+     */
+    fun applyWithDependencies(component: CustomComponent, item: ItemStack, tier: Tier? = null) {
+        // 1. バニラDataComponent依存を適用
+        for (dataType in component.dataComponentDependencies) {
+            if (!item.hasData(dataType)) {
+                item.setData(dataType)
+            }
+        }
+
+        // 2. CustomComponent依存を再帰的に適用
+        for (depKey in component.componentDependencies) {
+            val dep = get(depKey)
+            if (dep != null && !dep.has(item)) {
+                applyWithDependencies(dep, item, null)
+            }
+        }
+
+        // 3. 本体を適用
+        component.apply(item, tier)
+    }
 }