修复BUG

tests/Feature/ProductCostPriceTest.php

@@ -108,6 +108,47 @@ class ProductCostPriceTest extends ProcurementTestCase
         $this->assertSame('10.00', (string) $product->cost_price);
     }
 
+    /** 单价单位：不传默认「元/斤」，创建/编辑可修改 */
+    public function test_product_price_unit_default_and_editable(): void
+    {
+        $this->actingAsSysUser();
+        $category = $this->makeCategory();
+
+        // 不传单价单位 → 默认「元/斤」
+        $this->postJson('/product/goods', [
+            'category_id' => $category->id,
+            'name' => '默认单价单位商品',
+            'content' => '测试图文详情',
+        ])->assertOk()->assertJsonPath('success', true);
+        $product = ProductModel::where('name', '默认单价单位商品')->first();
+        $this->assertSame('元/斤', $product->price_unit);
+
+        // 创建时指定 + 编辑修改
+        $this->postJson('/product/goods', [
+            'category_id' => $category->id,
+            'name' => '箱装商品',
+            'content' => '测试图文详情',
+            'price_unit' => '元/箱',
+        ])->assertOk()->assertJsonPath('success', true);
+        $product2 = ProductModel::where('name', '箱装商品')->first();
+        $this->assertSame('元/箱', $product2->price_unit);
+
+        $this->putJson("/product/goods/{$product2->id}", [
+            'category_id' => $category->id,
+            'name' => '箱装商品',
+            'price_unit' => '元/件',
+        ])->assertOk()->assertJsonPath('success', true);
+        $this->assertSame('元/件', $product2->refresh()->price_unit);
+
+        // 超长拒绝
+        $this->postJson('/product/goods', [
+            'category_id' => $category->id,
+            'name' => '异常单价单位商品',
+            'content' => '测试图文详情',
+            'price_unit' => str_repeat('元', 21),
+        ])->assertOk()->assertJsonPath('success', false);
+    }
+
     /** 批量调价-成本价行：更新成本并通知门店；等级售价随上浮比例联动 */
     public function test_batch_price_cost_row_update(): void
     {