fix(backend): 入库审核库存沿用明细真实快照名 + 库存列表过滤软删商品，修复历史导入占位顶替；入库/出库列表支持 keyword 搜索

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YZ4DskSRKsSiheQonFtQvx

backend/internal/handler/stock_out_test.go

@@ -133,6 +133,51 @@ func TestStockOutHandler_List(t *testing.T) {
 	assert.Equal(t, float64(2), resp["total"].(float64))
 }
 
+func TestStockOutHandler_List_FilterByKeyword(t *testing.T) {
+	db := testutil.SetupTestDB()
+	shop := testutil.CreateTestShop(db, "SO011")
+	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
+	warehouse := testutil.CreateTestWarehouse(db, shop.ID, "Warehouse")
+	product := testutil.CreateTestProduct(db, shop.ID, "Beer")
+	token := getAuthToken(user.ID, shop.ID, "admin")
+	r := setupProtectedRouter(db)
+
+	// 往来单位：海底捞客户
+	partner := &model.Partner{Code: "C001", Name: "海底捞客户", Type: "customer"}
+	partner.ShopID = shop.ID
+	require.NoError(t, db.Create(partner).Error)
+
+	// 单据1：挂往来单位
+	w := makeRequest(r, "POST", "/api/v1/stock-out/orders", token, map[string]interface{}{
+		"warehouse_id": warehouse.ID,
+		"partner_id":   partner.ID,
+		"order_date":   time.Now().Format(time.RFC3339),
+		"items":        []map[string]interface{}{{"product_id": product.ID, "quantity": 1.0}},
+	})
+	require.Equal(t, http.StatusCreated, w.Code)
+	order1No := parseResponse(w)["data"].(map[string]interface{})["order_no"].(string)
+
+	// 单据2：无往来单位
+	w = makeRequest(r, "POST", "/api/v1/stock-out/orders", token, map[string]interface{}{
+		"warehouse_id": warehouse.ID,
+		"order_date":   time.Now().Format(time.RFC3339),
+		"items":        []map[string]interface{}{{"product_id": product.ID, "quantity": 1.0}},
+	})
+	require.Equal(t, http.StatusCreated, w.Code)
+
+	// 按往来单位名搜索
+	w = makeRequest(r, "GET", "/api/v1/stock-out/orders?keyword=海底捞", token, nil)
+	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
+
+	// 按单号搜索
+	w = makeRequest(r, "GET", "/api/v1/stock-out/orders?keyword="+order1No, token, nil)
+	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
+
+	// 无关键词
+	w = makeRequest(r, "GET", "/api/v1/stock-out/orders", token, nil)
+	assert.Equal(t, float64(2), parseResponse(w)["total"].(float64))
+}
+
 func TestStockOutHandler_Reject(t *testing.T) {
 	db := testutil.SetupTestDB()
 	shop := testutil.CreateTestShop(db, "SO004")