fix: check

src/pages/Index/Index.vue

@@ -462,7 +462,7 @@ const startTest = async () => {
     showDeviceWaitingModal.value = true
     const res = await startWork()
     showDeviceWaitingModal.value = false
-    if (res.success) {
+    if (res && res.success) {
       await untilDeviceReady()
     } else {
       ElMessage({
@@ -481,7 +481,7 @@ const pauseTest = async () => {
   showDeviceWaitingModal.value = true
   const res = await pauseWork()
   showDeviceWaitingModal.value = false
-  if (res.success) {
+  if (res && res.success) {
     await untilDeviceReady()
   } else {
     ElMessage({
@@ -497,7 +497,7 @@ const stopTest = async () => {
   showDeviceWaitingModal.value = true
   const res = await stopWork()
   showDeviceWaitingModal.value = false
-  if (res.success) {
+  if (res && res.success) {
     await untilDeviceReady()
   } else {
     ElMessage({
@@ -512,7 +512,7 @@ const continueTest = async () => {
   showDeviceWaitingModal.value = true
   const res = await continueWork()
   showDeviceWaitingModal.value = false
-  if (res.success) {
+  if (res && res.success) {
     await untilDeviceReady()
   } else {
     ElMessage({