From a92b889dfa8ea020118d18532c1fdd568ed96145 Mon Sep 17 00:00:00 2001
From: hypercross <helios.tnak@gmail.com>
Date: Tue, 21 Apr 2026 16:50:48 +0800
Subject: [PATCH] feat(sts-like-viewer): batch inventory item movement

Wrap item removal and placement in a batch to prevent multiple
reactive updates when moving items between inventories.
---
 packages/sts-like-viewer/src/state/inventory.ts | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/packages/sts-like-viewer/src/state/inventory.ts b/packages/sts-like-viewer/src/state/inventory.ts
index 3a95be8..393b6ec 100644
--- a/packages/sts-like-viewer/src/state/inventory.ts
+++ b/packages/sts-like-viewer/src/state/inventory.ts
@@ -10,6 +10,7 @@ import {
   Transform2D,
   validatePlacement,
 } from "boardgame-core/samples/slay-the-spire-like";
+import { batch } from "@preact/signals-core";
 
 function genId() {
   return Math.random().toString(16).slice(-8);
@@ -62,13 +63,15 @@ export function moveItem(
   const validation = validatePlacement(removed, item.shape, newTransform);
   if (!validation.valid) return false;
 
-  from.produce((inv) => {
-    removeItemFromGrid(inv, itemId);
-  });
-  to.produce((inv) => {
-    placeItem(inv, {
-      ...item,
-      transform: newTransform,
+  batch(() => {
+    from.produce((inv) => {
+      removeItemFromGrid(inv, itemId);
+    });
+    to.produce((inv) => {
+      placeItem(inv, {
+        ...item,
+        transform: newTransform,
+      });
     });
   });