feat: 統一全系統頁面標題樣式、優化側邊欄與實作角色成員查看功能

resources/js/Pages/PurchaseOrder/Create.tsx

@@ -2,7 +2,7 @@
  * 建立/編輯採購單頁面
  */
 
-import { ArrowLeft, Plus, Info } from "lucide-react";
+import { ArrowLeft, Plus, Info, ShoppingCart } from "lucide-react";
 import { Button } from "@/Components/ui/button";
 import { Input } from "@/Components/ui/input";
 import { Textarea } from "@/Components/ui/textarea";
@@ -173,8 +173,11 @@ export default function CreatePurchaseOrder({
                     </Link>
 
                     <div className="mb-6">
-                        <h1 className="mb-2">{order ? "編輯採購單" : "建立採購單"}</h1>
-                        <p className="text-gray-600">
+                        <h1 className="text-2xl font-bold text-grey-0 flex items-center gap-2">
+                            <ShoppingCart className="h-6 w-6 text-[#01ab83]" />
+                            {order ? "編輯採購單" : "建立採購單"}
+                        </h1>
+                        <p className="text-gray-500 mt-1">
                             {order ? `修改採購單 ${order.poNumber} 的詳細資訊` : "填寫新採購單的資訊以開始流程"}
                         </p>
                     </div>