feat: 優化採購單操作紀錄與統一刪除確認 UI

- 優化採購單更新與刪除的活動紀錄邏輯 (PurchaseOrderController)
  - 整合更新異動為單一紀錄，包含品項差異
  - 刪除時記錄當下品項快照
- 統一採購單刪除確認介面，使用 AlertDialog 取代原生 confirm (PurchaseOrderActions)
- Refactor: 將 ActivityDetailDialog 移至 Components/ActivityLog 並優化樣式與大數據顯示
- 調整 UI 文字：將「總金額」統一為「小計」
- 其他模型與 Controller 的活動紀錄支援更新

resources/js/Pages/PurchaseOrder/Show.tsx

@@ -143,11 +143,21 @@ export default function ViewPurchaseOrderPage({ order }: Props) {
                                     items={order.items}
                                     isReadOnly={true}
                                 />
-                                <div className="mt-4 flex justify-end items-center gap-4 border-t pt-4">
-                                    <span className="text-gray-600 font-medium">總金額</span>
-                                    <span className="text-xl font-bold text-primary">
-                                        {formatCurrency(order.totalAmount)}
-                                    </span>
+                                <div className="mt-4 flex flex-col items-end gap-2 border-t pt-4">
+                                    <div className="flex items-center gap-8 text-gray-600">
+                                        <span className="font-medium">小計</span>
+                                        <span>{formatCurrency(order.totalAmount)}</span>
+                                    </div>
+                                    <div className="flex items-center gap-8 text-gray-600">
+                                        <span className="font-medium">稅額</span>
+                                        <span>{formatCurrency(order.tax_amount || 0)}</span>
+                                    </div>
+                                    <div className="flex items-center gap-8 pt-2 mt-2 border-t border-gray-100">
+                                        <span className="font-bold text-lg">總計</span>
+                                        <span className="text-xl font-bold text-primary">
+                                            {formatCurrency(order.grand_total || (order.totalAmount + (order.tax_amount || 0)))}
+                                        </span>
+                                    </div>
                                 </div>
                             </div>
                         </div>