feat: 實作銷售單匯入管理、貨道扣庫優化及 UI 細節調整

app/Modules/Sales/Imports/SalesImport.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Modules\Sales\Imports;
+
+use App\Modules\Sales\Models\SalesImportBatch;
+use Maatwebsite\Excel\Concerns\WithMultipleSheets;
+
+class SalesImport implements WithMultipleSheets
+{
+    protected $batch;
+
+    public function __construct(SalesImportBatch $batch)
+    {
+        $this->batch = $batch;
+    }
+
+    public function sheets(): array
+    {
+        // Only import the first sheet (index 0)
+        return [
+            0 => new SalesImportSheet($this->batch),
+        ];
+    }
+}