feat(production): 優化生產單 BOM 原物料選取邏輯，支援商品 -> 倉庫 -> 批號連動與 API 分佈查詢

app/Modules/Procurement/Controllers/PurchaseOrderController.php

@@ -187,20 +187,20 @@ class PurchaseOrderController extends Controller
         try {
             DB::beginTransaction();
 
-            // 生成單號：POYYYYMMDD001
+            // 生成單號：PO-YYYYMMDD-01
             $today = now()->format('Ymd');
-            $prefix = 'PO' . $today;
+            $prefix = 'PO-' . $today . '-';
             $lastOrder = PurchaseOrder::where('code', 'like', $prefix . '%')
                 ->lockForUpdate() // 鎖定以避免並發衝突
                 ->orderBy('code', 'desc')
                 ->first();
 
             if ($lastOrder) {
-                // 取得最後 3 碼序號並加 1
-                $lastSequence = intval(substr($lastOrder->code, -3));
-                $sequence = str_pad($lastSequence + 1, 3, '0', STR_PAD_LEFT);
+                // 取得最後 2 碼序號並加 1
+                $lastSequence = intval(substr($lastOrder->code, -2));
+                $sequence = str_pad($lastSequence + 1, 2, '0', STR_PAD_LEFT);
             } else {
-                $sequence = '001';
+                $sequence = '01';
             }
             $code = $prefix . $sequence;