fix switch camara

src/views/HomeView.vue

@@ -392,25 +392,12 @@ async function switchCamera() {
     return
   }
 
-  const frontCameras = availableCameras.value.filter((device: any) =>
-    identifyCameraType(device.label || '') === 'front'
-  )
-  const backCameras = availableCameras.value.filter((device: any) =>
-    identifyCameraType(device.label || '') === 'back'
-  )
-
-  let targetDevice
-  if (currentCameraType.value === 'front' && backCameras.length > 0) {
-    targetDevice = backCameras[0]
-  } else if (frontCameras.length > 0) {
-    targetDevice = frontCameras[0]
-  } else {
-    const nextIndex = (currentCameraIndex.value + 1) % availableCameras.value.length
-    targetDevice = availableCameras.value[nextIndex]
-  }
+  // สลับแค่ระหว่างกล้อง 2 ตัวแรก (กล้องหน้าและหลังหลัก)
+  const targetIndex = currentCameraIndex.value === 0 ? 1 : 0
+  const targetDevice = availableCameras.value[targetIndex]
 
   await camera.value?.changeCamera(targetDevice.deviceId)
-  currentCameraIndex.value = availableCameras.value.indexOf(targetDevice)
+  currentCameraIndex.value = targetIndex
   currentCameraType.value = identifyCameraType(targetDevice.label || '')
 }