fix(component): fix race condition in MaterialTypeManagementDialog row addition

Use functional setState to correctly calculate new row index based on
latest state, preventing stale closure issues.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/renderer/src/components/MaterialTypeManagementDialog.tsx

@@ -147,13 +147,16 @@ export const MaterialTypeManagementDialog: React.FC<MaterialTypeManagementDialog
       },
       state: 'new'
     }
-    setRows((prev) => [...prev, newRow])
+
-    // Start editing the material name cell
+    // 在 setRows 回调中计算索引并设置编辑状态
-    const newIndex = rows.length
+    setRows((prev) => {
+      const newIndex = prev.length
       setTimeout(() => {
         setEditingCell({ rowIndex: newIndex, field: 'materialName' })
         setEditValue('')
       }, 0)
+      return [...prev, newRow]
+    })
   }
 
   // Delete row