build fix

src/main/java/com/github/sebseb7/autotrade/event/ContainerIoHelper.java

@@ -1,6 +1,7 @@
 package com.github.sebseb7.autotrade.event;
 
 import com.github.sebseb7.autotrade.config.Configs;
+import com.github.sebseb7.autotrade.mixin.MultiPlayerGameModeInvoker;
 import com.github.sebseb7.autotrade.util.TradeItemSpec;
 import fi.dy.masa.malilib.gui.Message;
 import fi.dy.masa.malilib.util.InfoUtils;
@@ -32,18 +33,17 @@ final class ContainerIoHelper {
 	}
 
 	/**
-	 * After automated merchant packets (select trade + shift-clicks), client-side
-	 * prediction can drift from the server. Flush the carried/cursor stack and run
-	 * again on the next tick so pending slot updates have landed.
+	 * After automated merchant packets, flush cursor/carried prediction so it matches the server.
+	 * Implemented via {@link MultiPlayerGameModeInvoker} because {@code ensureHasSentCarriedItem()} is private.
 	 */
 	static void syncPlayerInventoryAfterMerchant(Minecraft mc) {
 		if (mc.player == null || mc.gameMode == null) {
 			return;
 		}
-		mc.gameMode.ensureHasSentCarriedItem();
+		((MultiPlayerGameModeInvoker) mc.gameMode).invokeEnsureHasSentCarriedItem();
 		mc.execute(() -> {
 			if (mc.player != null && mc.gameMode != null) {
-				mc.gameMode.ensureHasSentCarriedItem();
+				((MultiPlayerGameModeInvoker) mc.gameMode).invokeEnsureHasSentCarriedItem();
 			}
 		});
 	}

src/main/java/com/github/sebseb7/autotrade/mixin/MultiPlayerGameModeInvoker.java

@@ -0,0 +1,12 @@
+package com.github.sebseb7.autotrade.mixin;
+
+import net.minecraft.client.multiplayer.MultiPlayerGameMode;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(MultiPlayerGameMode.class)
+public interface MultiPlayerGameModeInvoker {
+
+	@Invoker("ensureHasSentCarriedItem")
+	void invokeEnsureHasSentCarriedItem();
+}

src/main/resources/autotrade.mixins.json

@@ -0,0 +1,12 @@
+{
+	"required": true,
+	"minVersion": "0.8",
+	"package": "com.github.sebseb7.autotrade.mixin",
+	"compatibilityLevel": "JAVA_21",
+	"client": [
+		"MultiPlayerGameModeInvoker"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}

src/main/templates/fabric.mod.json

@@ -27,6 +27,7 @@
 	},
 
 	"mixins": [
+		"autotrade.mixins.json"
 	],
 
 	"depends": {