fix(player): 收敛播放页入口加载态

lib/pages/player/widgets/seek_progress_bar.dart

@@ -42,6 +42,7 @@ class SeekProgressBar extends StatefulWidget {
     this.spriteAxisService,
     this.episodeId,
     this.thumbnailsUrl,
+    this.fallbackDuration = Duration.zero,
   });
 
   final ValueListenable<VideoPlayerValue>? valueListenable;
@@ -57,6 +58,7 @@ class SeekProgressBar extends StatefulWidget {
   final SpriteThumbnailAxisService? spriteAxisService;
   final String? episodeId;
   final String? thumbnailsUrl;
+  final Duration fallbackDuration;
 
   @override
   State<SeekProgressBar> createState() => _SeekProgressBarState();
@@ -220,7 +222,10 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
   }
 
   Widget _buildTrack(BuildContext context, VideoPlayerValue video) {
-    final total = video.duration.inMilliseconds;
+    final duration = video.duration > Duration.zero
+        ? video.duration
+        : widget.fallbackDuration;
+    final total = duration.inMilliseconds;
     final scrubbing = _dragging;
     final loading = !widget.locked && !scrubbing && _buffering;
     final enabled =
@@ -234,7 +239,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
     final fraction = _previewFraction.value ?? played;
     final previewPosition = _previewFraction.value == null
         ? video.position
-        : seekPositionForFraction(fraction, video.duration);
+        : seekPositionForFraction(fraction, duration);
     final showPreview =
         scrubbing &&
         widget.showTimes &&
@@ -248,11 +253,26 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
         final track = Column(
           mainAxisSize: MainAxisSize.min,
           children: [
+            if (widget.showTimes && !video.isInitialized)
+              Padding(
+                padding: const EdgeInsets.only(bottom: 2),
+                child: Text(
+                  '00:00 / ${_format(duration)}',
+                  key: const Key('player-progress-uninitialized-time'),
+                  textAlign: TextAlign.center,
+                  style: const TextStyle(
+                    color: AppColors.onPrimary,
+                    fontSize: 12,
+                    fontWeight: FontWeight.w600,
+                    height: 1.2,
+                  ),
+                ),
+              ),
             if (widget.showTimes && scrubbing && !showPreview)
               Padding(
                 padding: const EdgeInsets.only(bottom: 2),
                 child: Text(
-                  '${_format(previewPosition)} / ${_format(video.duration)}',
+                  '${_format(previewPosition)} / ${_format(duration)}',
                   textAlign: TextAlign.center,
                   style: const TextStyle(
                     color: AppColors.onPrimary,
@@ -350,7 +370,7 @@ class _SeekProgressBarState extends State<SeekProgressBar> {
                   thumbnailsUrl: widget.thumbnailsUrl,
                   episodeId: widget.episodeId!,
                   position: previewPosition,
-                  duration: video.duration,
+                  duration: duration,
                 ),
               ),
           ],