fix: full file playback resets all state to play to end of file

- Clear all marks (not just face marks)
- Reset playMode to 'continuous' to disable trace/segment limits
- Reset currentTraceIdx and currentSegmentIdx to 0
- Reset seekFrame to 0
- This ensures full file plays from start to end without restrictions

src/components/VideoPlayer.vue

@@ -1376,7 +1376,10 @@ function formatTime(sec: number): string {
 async function playFullFile() {
   videoLoading.value = true
   videoError.value = ''
-  marks.value = marks.value.filter(m => m.source !== 'face')
+  marks.value = []
+  playMode.value = 'continuous'
+  currentTraceIdx.value = 0
+  currentSegmentIdx.value = 0
   try {
     const data = await apiCall('get_video_stream', {
       uuid: props.fileUuid,
@@ -1393,6 +1396,7 @@ async function playFullFile() {
       videoSrc.value = URL.createObjectURL(blob)
     }
     frameOffset.value = 0
+    seekFrame.value = 0
     await nextTick()
     videoEl.value?.load()
   } catch (e: any) {