修复seeking后无法拉动进度条的问题

public/js/main.js

@@ -585,9 +585,11 @@ document.addEventListener('DOMContentLoaded', () => {
 
         const onCanPlay = () => {
             if (seekingOverlay) seekingOverlay.classList.add('hidden');
+            isStreamActive = true;
             lastAbsolutePlaybackTime = targetSeconds;
             videoPlayer.play().catch(() => {});
             updatePlayControls();
+            schedulePlaybackChromeHide();
             videoPlayer.removeEventListener('canplay', onCanPlay);
         };
         videoPlayer.addEventListener('canplay', onCanPlay, { once: true });
@@ -595,6 +597,7 @@ document.addEventListener('DOMContentLoaded', () => {
         // Timeout fallback: hide seeking overlay after 8s even if canplay doesn't fire
         pendingSeekTimeout = setTimeout(() => {
             if (seekingOverlay) seekingOverlay.classList.add('hidden');
+            isStreamActive = true;
             pendingSeekTimeout = null;
         }, 8000);
     };