feat(reels): user info/caption also hide on collapse; auto-scroll + speed; save-block deterrent

- Username/caption block, and the long-video progress bar, only checked
  chromeHidden (the long-press hide-everything state) — not
  actionsExpanded (the 3-dot-adjacent collapse toggle), so collapsing icons
  never hid them. Now both also respect actionsExpanded.
- Wired playbackSpeed (via a playbackRate effect on the <video> ref, since
  it isn't a JSX prop) and autoScrollEnabled (loop={!autoScrollEnabled} +
  onEnded calling the new onRequestNext prop, which both reels feeds
  (ExploreReelsView, PostFeedView) implement by scrollTo-ing to the next
  item).
- Added onContextMenu prevention (+ draggable=false on the poster image)
  when author_allow_save is false — this is a best-effort deterrent against
  casual right-click/drag saving only. No browser exposes an API to block
  actual OS-level screenshots; that isn't something any website can do.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/components/explore/ExploreReelsView.tsx

@@ -406,6 +406,13 @@ export default function ExploreReelsView({
                 <ReelsPostCard
                   postData={item.post}
                   isActive={item.key === activeKey}
+                  onRequestNext={() => {
+                    if (!scrollRef.current || index + 1 >= items.length) return;
+                    scrollRef.current.scrollTo({
+                      top: (index + 1) * getReelsStepHeight(scrollRef.current),
+                      behavior: "smooth",
+                    });
+                  }}
                 />
               ) : (
                 <ReelsAcademyCard

src/components/posts/PostFeedView.tsx

@@ -800,6 +800,13 @@ export default function PostFeedView({
                   isActive={String(post._id) === String(activePostId)}
                   postPage={feedMode === "user" && showClose}
                   preloadPriority={preloadPriority}
+                  onRequestNext={() => {
+                    if (!scrollRef.current || index + 1 >= displayPosts.length) return;
+                    scrollRef.current.scrollTo({
+                      top: (index + 1) * getReelsStepHeight(scrollRef.current),
+                      behavior: "smooth",
+                    });
+                  }}
                 />
               </ReelsScrollSlot>
               );

src/components/posts/ReelsPostCard.tsx

@@ -68,6 +68,8 @@ interface ReelsPostCardProps {
   isActive?: boolean;
   postPage?: boolean;
   preloadPriority?: VideoPreloadPriority;
+  /** وقتی پیمایش خودکار فعاله و این ریلز (فعال) به انتهای ویدیو رسید */
+  onRequestNext?: () => void;
 }
 
 export default function ReelsPostCard({
@@ -75,6 +77,7 @@ export default function ReelsPostCard({
   isActive = false,
   postPage = false,
   preloadPriority = "idle",
+  onRequestNext,
 }: ReelsPostCardProps) {
   const { t } = useTranslation("common");
   const {
@@ -146,6 +149,11 @@ export default function ReelsPostCard({
   const social = usePostSocialState(postData);
   const requireAuth = useRequireAuth();
   const chromeHidden = exploreUi ? exploreUi.chromeHidden : uiHidden;
+  // اطلاعات کاربر/کپشن هم باید با دکمه‌ی جمع‌کردن آیکون‌ها مخفی بشن، نه فقط با
+  // hold روی تصویر (chromeHidden) — قبلاً این بلوک فقط chromeHidden رو چک می‌کرد
+  const actionsExpanded = exploreUi ? exploreUi.actionsExpanded : true;
+  const autoScrollEnabled = exploreUi ? exploreUi.autoScrollEnabled : false;
+  const playbackSpeed = exploreUi ? exploreUi.playbackSpeed : 1;
   const allowSave = postData.author_allow_save !== false;
 
   const useCommentsSheet = !postPage;
@@ -155,7 +163,8 @@ export default function ReelsPostCard({
     videoDuration > LONG_VIDEO_SEC &&
     isActive &&
     !chromeHidden &&
-    !anyCommentsOpen;
+    !anyCommentsOpen &&
+    actionsExpanded;
 
   const mediaFiles =
     files?.map((file) => ({
@@ -315,6 +324,12 @@ export default function ReelsPostCard({
     setVideoPaused(false);
   }, [videoSrc]);
 
+  // <video> عنصرِ HTML سرعتِ پخش رو به‌عنوان JSX prop نمی‌گیره، باید مستقیم روی خودِ
+  // المنت ست بشه — هم موقع تغییرِ سرعت از منو، هم موقع لود شدنِ منبعِ جدید
+  useEffect(() => {
+    if (videoRef.current) videoRef.current.playbackRate = playbackSpeed;
+  }, [playbackSpeed, videoSrc]);
+
   useEffect(() => {
     if (type !== "video" || !videoSrc) return;
     if (preloadPriority === "active" || preloadPriority === "nearby") {
@@ -440,20 +455,30 @@ export default function ReelsPostCard({
                   sizes="100vw"
                   className="object-contain"
                   priority={isActive || preloadPriority === "nearby"}
+                  draggable={!allowSave ? false : undefined}
+                  onContextMenu={
+                    !allowSave ? (e) => e.preventDefault() : undefined
+                  }
                 />
               )}
               <video
                 ref={videoRef}
                 src={videoSrc ?? mediaFiles[0]?.src}
                 poster={videoPoster}
-                loop
+                loop={!autoScrollEnabled}
                 playsInline
                 preload={videoPreload}
+                controlsList="nodownload"
                 className={cn(
                   "h-full w-full object-contain",
                   videoPoster && !videoReady && "opacity-0"
                 )}
                 onClick={handleVideoClick}
+                // مرورگر نمی‌تونه از اسکرین‌شات واقعی جلوگیری کنه (هیچ API مرورگری برای این
+                // وجود نداره)؛ این فقط راه‌های ساده‌ی دانلود/ذخیره (کلیک راست، درگ) رو می‌بندد
+                onContextMenu={
+                  !allowSave ? (e) => e.preventDefault() : undefined
+                }
                 onLoadedData={() => {
                   setImageLoading(false);
                   setVideoReady(true);
@@ -469,6 +494,9 @@ export default function ReelsPostCard({
                 onProgress={handleVideoTimeUpdate}
                 onPlay={() => setVideoPaused(false)}
                 onPause={() => setVideoPaused(true)}
+                onEnded={() => {
+                  if (isActive && autoScrollEnabled) onRequestNext?.();
+                }}
                 muted={muted}
               />
               {videoPaused && isActive && !commentsOpen && (
@@ -578,7 +606,7 @@ export default function ReelsPostCard({
         )}
 
         <AnimatePresence>
-          {!chromeHidden && !anyCommentsOpen && (
+          {!chromeHidden && !anyCommentsOpen && actionsExpanded && (
             <>
               <motion.div
                 initial={{ opacity: 0 }}