feat: 實作庫存列表展開狀態保留 (使用 sessionStorage) 改良顯示與修正相關問題

resources/js/Components/Warehouse/Inventory/InventoryTable.tsx

@@ -3,7 +3,8 @@
  * 顯示庫存項目列表（依商品分組並支援折疊）
  */
 
-import { useState } from "react";
+import { useState, useEffect } from "react";
+
 import { AlertTriangle, Trash2, Eye, ChevronDown, ChevronRight, CheckCircle, Package } from "lucide-react";
 import {
     Table,
@@ -47,10 +48,29 @@ export default function InventoryTable({
     // 判斷是否為販賣機倉庫
     const isVending = warehouse?.type === "vending";
 
-    // 每個商品的展開/折疊狀態
-    const [expandedProducts, setExpandedProducts] = useState<Set<string>>(new Set());
+    // 每個商品的展開/折疊狀態 - 使用 sessionStorage 保留狀態 (改用 Array 以利序列化)
+    // 解決使用 Link 返回時 State 被重置的問題
+    const storageKey = `inventory_expanded_${warehouse.id}`;
+    const [expandedProducts, setExpandedProducts] = useState<string[]>(() => {
+        if (typeof window === 'undefined') return [];
+        try {
+            const saved = sessionStorage.getItem(storageKey);
+            return saved ? JSON.parse(saved) : [];
+        } catch (e) {
+            console.error("Failed to parse expanded state", e);
+            return [];
+        }
+    });
 
+    useEffect(() => {
+        try {
+            sessionStorage.setItem(storageKey, JSON.stringify(expandedProducts));
+        } catch (e) {
+            console.error("Failed to save expanded state", e);
+        }
+    }, [expandedProducts, storageKey]);
 
+    // console.log('InventoryTable Rendered', { warehouseId: warehouse.id, expandedProducts });
 
     if (inventories.length === 0) {
         return (
@@ -68,13 +88,11 @@ export default function InventoryTable({
 
     const toggleProduct = (productId: string) => {
         setExpandedProducts((prev) => {
-            const newSet = new Set(prev);
-            if (newSet.has(productId)) {
-                newSet.delete(productId);
+            if (prev.includes(productId)) {
+                return prev.filter(id => id !== productId);
             } else {
-                newSet.add(productId);
+                return [...prev, productId];
             }
-            return newSet;
         });
     };
 
@@ -111,7 +129,7 @@ export default function InventoryTable({
                     const status = group.status;
 
                     const isLowStock = status === "低於";
-                    const isExpanded = expandedProducts.has(group.productId);
+                    const isExpanded = expandedProducts.includes(group.productId);
                     const hasInventory = group.batches.length > 0;
 
                     return (