feat(sync): full code sync from release

backend/internal/handler/dto/mappers_usage_test.go

@@ -0,0 +1,73 @@
+package dto
+
+import (
+	"testing"
+
+	"github.com/Wei-Shaw/sub2api/internal/service"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUsageLogFromService_IncludesOpenAIWSMode(t *testing.T) {
+	t.Parallel()
+
+	wsLog := &service.UsageLog{
+		RequestID:    "req_1",
+		Model:        "gpt-5.3-codex",
+		OpenAIWSMode: true,
+	}
+	httpLog := &service.UsageLog{
+		RequestID:    "resp_1",
+		Model:        "gpt-5.3-codex",
+		OpenAIWSMode: false,
+	}
+
+	require.True(t, UsageLogFromService(wsLog).OpenAIWSMode)
+	require.False(t, UsageLogFromService(httpLog).OpenAIWSMode)
+	require.True(t, UsageLogFromServiceAdmin(wsLog).OpenAIWSMode)
+	require.False(t, UsageLogFromServiceAdmin(httpLog).OpenAIWSMode)
+}
+
+func TestUsageLogFromService_PrefersRequestTypeForLegacyFields(t *testing.T) {
+	t.Parallel()
+
+	log := &service.UsageLog{
+		RequestID:    "req_2",
+		Model:        "gpt-5.3-codex",
+		RequestType:  service.RequestTypeWSV2,
+		Stream:       false,
+		OpenAIWSMode: false,
+	}
+
+	userDTO := UsageLogFromService(log)
+	adminDTO := UsageLogFromServiceAdmin(log)
+
+	require.Equal(t, "ws_v2", userDTO.RequestType)
+	require.True(t, userDTO.Stream)
+	require.True(t, userDTO.OpenAIWSMode)
+	require.Equal(t, "ws_v2", adminDTO.RequestType)
+	require.True(t, adminDTO.Stream)
+	require.True(t, adminDTO.OpenAIWSMode)
+}
+
+func TestUsageCleanupTaskFromService_RequestTypeMapping(t *testing.T) {
+	t.Parallel()
+
+	requestType := int16(service.RequestTypeStream)
+	task := &service.UsageCleanupTask{
+		ID:     1,
+		Status: service.UsageCleanupStatusPending,
+		Filters: service.UsageCleanupFilters{
+			RequestType: &requestType,
+		},
+	}
+
+	dtoTask := UsageCleanupTaskFromService(task)
+	require.NotNil(t, dtoTask)
+	require.NotNil(t, dtoTask.Filters.RequestType)
+	require.Equal(t, "stream", *dtoTask.Filters.RequestType)
+}
+
+func TestRequestTypeStringPtrNil(t *testing.T) {
+	t.Parallel()
+	require.Nil(t, requestTypeStringPtr(nil))
+}