fix(player): 收敛播放入口缓冲提示

lib/pages/player/widgets/seek_progress_bar.dart

@@ -114,7 +114,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
     if (!value.isInitialized) {
       _bufferTimer?.cancel();
       _bufferTimer = null;
-      _setBuffering(true, notify: notify);
+      _setBuffering(false, notify: notify);
       return;
     }
     if (!value.isBuffering) {
@@ -181,8 +181,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
   Widget _buildTrack(BuildContext context, VideoPlayerValue video) {
     final total = video.duration.inMilliseconds;
     final scrubbing = _previewFraction.value != null;
-    final loading =
-        !widget.locked && !scrubbing && (!video.isInitialized || _buffering);
+    final loading = !widget.locked && !scrubbing && _buffering;
     final enabled =
         !widget.locked &&
         video.isInitialized &&
@@ -223,7 +222,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
           ),
         SizedBox(
           height: trackAreaHeight,
-          child: widget.locked
+          child: widget.locked || !video.isInitialized
               ? _inactiveTrack(trackHeight)
               : loading
               ? Center(