feat(tv): enhance fullscreen functionality for iOS Safari with video element events

k-tv-frontend/app/(main)/tv/page.tsx

@@ -98,6 +98,21 @@ function TvPageContent() {
     return () => document.removeEventListener("fullscreenchange", handler);
   }, []);
 
+  // iOS Safari: track fullscreen state via webkit video element events.
+  // Re-run when streamUrl changes so we catch the video element after it mounts.
+  useEffect(() => {
+    const video = videoRef.current;
+    if (!video) return;
+    const onBegin = () => setIsFullscreen(true);
+    const onEnd = () => setIsFullscreen(false);
+    video.addEventListener("webkitbeginfullscreen", onBegin);
+    video.addEventListener("webkitendfullscreen", onEnd);
+    return () => {
+      video.removeEventListener("webkitbeginfullscreen", onBegin);
+      video.removeEventListener("webkitendfullscreen", onEnd);
+    };
+  }, [streamUrl]);
+
   // Hide the shared nav bar in fullscreen; reveal it when overlays are shown
   // (mouse move / key press). Classes are cleaned up on unmount.
   useEffect(() => {
@@ -105,11 +120,29 @@ function TvPageContent() {
     document.body.classList.toggle("tv-overlays", isFullscreen && showOverlays);
     return () => document.body.classList.remove("tv-fullscreen", "tv-overlays");
   }, [isFullscreen, showOverlays]);
+
   const toggleFullscreen = useCallback(() => {
-    if (!document.fullscreenElement) {
-      document.documentElement.requestFullscreen().catch(() => {});
+    // Standard Fullscreen API (Chrome, Firefox, Safari desktop)
+    if (document.fullscreenEnabled) {
+      if (!document.fullscreenElement) {
+        document.documentElement.requestFullscreen().catch(() => {});
+      } else {
+        document.exitFullscreen().catch(() => {});
+      }
+      return;
+    }
+    // iOS Safari: requestFullscreen is not supported. Fall back to the video
+    // element's proprietary webkit API instead.
+    const video = videoRef.current as HTMLVideoElement & {
+      webkitEnterFullscreen?: () => void;
+      webkitExitFullscreen?: () => void;
+      webkitDisplayingFullscreen?: boolean;
+    };
+    if (!video?.webkitEnterFullscreen) return;
+    if (video.webkitDisplayingFullscreen) {
+      video.webkitExitFullscreen?.();
     } else {
-      document.exitFullscreen().catch(() => {});
+      video.webkitEnterFullscreen();
     }
   }, []);