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/Models/SalesImportBatch.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Modules\Sales\Models;
+
+use App\Modules\Core\Models\User;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class SalesImportBatch extends Model
+{
+    use HasFactory;
+
+    protected $table = 'sales_import_batches';
+
+    protected $fillable = [
+        'import_date',
+        'total_quantity',
+        'total_amount',
+        'status',
+        'imported_by',
+        'confirmed_at',
+        'note',
+    ];
+
+    protected $casts = [
+        'import_date' => 'date',
+        'confirmed_at' => 'datetime',
+        'total_quantity' => 'decimal:4',
+        'total_amount' => 'decimal:4',
+    ];
+
+    public function items(): HasMany
+    {
+        return $this->hasMany(SalesImportItem::class, 'batch_id');
+    }
+
+    public function importer(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'imported_by');
+    }
+}