feat: Enhance search history dropdown with absolute positioning and empty state styling; improve video player autoplay functionality

app/globals.css

@@ -585,10 +585,10 @@ nav {
    SEARCH HISTORY DROPDOWN - LIQUID GLASS
    =========================================== */
 
-/* Search History Dropdown - Fixed positioning, Liquid Glass effect */
+/* Search History Dropdown - Absolute positioning under search bar, Liquid Glass effect */
 .search-history-dropdown {
-  position: fixed;
-  z-index: 9999;
+  /* Removed position: fixed - now using absolute from component */
+  max-height: 400px;
   overflow-y: auto;
   
   /* Liquid Glass effect - Core aesthetic */
@@ -749,6 +749,16 @@ nav {
   background: color-mix(in srgb, var(--accent-color) 50%, transparent);
 }
 
+/* Empty state styling */
+.search-history-empty {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 2rem 1rem;
+  text-align: center;
+}
+
 /* Accessibility - Focus visible states */
 .search-history-item:focus-visible {
   outline: 2px solid var(--accent-color);

app/page.tsx

@@ -105,9 +105,14 @@ function HomePage() {
   return (
     <div className="min-h-screen">
       {/* Glass Navbar */}
-      <nav className="sticky top-0 z-50 pt-4 pb-2">
+      <nav className="sticky top-0 z-50 pt-4 pb-2" style={{
+        transform: 'translate3d(0, 0, 0)',
+        willChange: 'transform'
+      }}>
         <div className="max-w-7xl mx-auto px-4">
-          <div className="bg-[var(--glass-bg)] backdrop-blur-[12px] saturate-[120%] [-webkit-backdrop-filter:blur(12px)_saturate(120%)] border border-[var(--glass-border)] shadow-[var(--shadow-md)] px-6 py-4 rounded-[var(--radius-2xl)]">
+          <div className="bg-[var(--glass-bg)] backdrop-blur-[12px] saturate-[120%] [-webkit-backdrop-filter:blur(12px)_saturate(120%)] border border-[var(--glass-border)] shadow-[var(--shadow-md)] px-6 py-4 rounded-[var(--radius-2xl)]" style={{
+            transform: 'translate3d(0, 0, 0)'
+          }}>
             <div className="flex items-center justify-between">
               <Link 
                 href="/" 
@@ -147,7 +152,10 @@ function HomePage() {
       </nav>
 
       {/* Search Form - Separate from navbar */}
-      <div className="max-w-7xl mx-auto px-4 mt-6 mb-8">
+      <div className="max-w-7xl mx-auto px-4 mt-6 mb-8 relative" style={{
+        transform: 'translate3d(0, 0, 0)',
+        zIndex: 1000
+      }}>
         <SearchForm
           onSearch={handleSearch}
           onClear={handleReset}

components/history/WatchHistorySidebar.tsx

@@ -105,7 +105,8 @@ export function WatchHistorySidebar() {
         aria-labelledby="history-sidebar-title"
         aria-hidden={!isOpen}
         style={{ 
-          transform: isOpen ? 'translateX(0)' : 'translateX(100%)'
+          transform: isOpen ? 'translate3d(0, 0, 0)' : 'translate3d(100%, 0, 0)',
+          willChange: isOpen ? 'transform' : 'auto'
         }}
         className={`fixed top-0 right-0 bottom-0 w-[85%] sm:w-[90%] max-w-[420px] z-[2000] bg-[var(--glass-bg)] backdrop-blur-[12px] saturate-[120%] border-l border-[var(--glass-border)] rounded-tl-[var(--radius-2xl)] rounded-bl-[var(--radius-2xl)] p-6 flex flex-col shadow-[0_8px_32px_rgba(0,0,0,0.2)] transition-transform duration-250 ease-out`}
       >
@@ -130,7 +131,10 @@ export function WatchHistorySidebar() {
         </header>
 
         {/* Content */}
-        <div className="flex-1 overflow-y-auto -mx-2 px-2">
+        <div className="flex-1 overflow-y-auto -mx-2 px-2" style={{ 
+          transform: 'translate3d(0, 0, 0)',
+          WebkitOverflowScrolling: 'touch'
+        }}>
           {viewingHistory.length === 0 ? (
             <HistoryEmptyState />
           ) : (

components/player/DesktopVideoPlayer.tsx

@@ -147,6 +147,12 @@ export function DesktopVideoPlayer({
     if (initialTime > 0) {
       videoRef.current.currentTime = initialTime;
     }
+    
+    // Auto-play the video when loaded
+    videoRef.current.play().catch(err => {
+      console.warn('Autoplay was prevented:', err);
+      // Autoplay may be blocked by browser policy, which is fine
+    });
   };
 
   const handleVideoError = () => {

components/player/MobileVideoPlayer.tsx

@@ -262,10 +262,8 @@ export function MobileVideoPlayer({
     } catch (error) {
       console.warn('Play/pause error:', error);
     } finally {
-      // Small delay to prevent rapid toggling
-      setTimeout(() => {
-        isTogglingRef.current = false;
-      }, 100);
+      // Immediately release the toggle lock
+      isTogglingRef.current = false;
     }
   };
 
@@ -290,6 +288,12 @@ export function MobileVideoPlayer({
     if (initialTime > 0) {
       videoRef.current.currentTime = initialTime;
     }
+    
+    // Auto-play the video when loaded
+    videoRef.current.play().catch(err => {
+      console.warn('Autoplay was prevented:', err);
+      // Show a toast or indication that user needs to tap to play
+    });
   };
 
   const handleVideoError = () => {

components/search/SearchForm.tsx

@@ -46,6 +46,10 @@ export function SearchForm({
   } = useSearchHistory((selectedQuery) => {
     setQuery(selectedQuery);
     onSearch(selectedQuery);
+    // Blur the input after selecting from history
+    setTimeout(() => {
+      inputRef.current?.blur();
+    }, 100);
   });
 
   // Update query when initialQuery changes
@@ -60,6 +64,8 @@ export function SearchForm({
       addSearch(query.trim());
       onSearch(query);
       hideDropdown();
+      // Blur the input to remove focus
+      inputRef.current?.blur();
     }
   };
 
@@ -72,12 +78,17 @@ export function SearchForm({
   };
 
   const handleInputFocus = () => {
-    if (query.trim() === '') {
-      showDropdown();
-    }
+    // Always show dropdown when focused, regardless of content
+    showDropdown();
   };
 
-  const handleInputBlur = () => {
+  const handleInputBlur = (e: React.FocusEvent<HTMLInputElement>) => {
+    // Check if the new focus target is within the dropdown
+    const relatedTarget = e.relatedTarget as HTMLElement;
+    if (relatedTarget && relatedTarget.closest('.search-history-dropdown')) {
+      // Don't hide dropdown if focus moved to dropdown
+      return;
+    }
     hideDropdown();
   };
 
@@ -108,7 +119,7 @@ export function SearchForm({
 
   return (
     <form onSubmit={handleSubmit} className="max-w-3xl mx-auto">
-      <div className="relative group">
+      <div className="relative group" style={{ isolation: 'isolate' }}>
         <Input
           ref={inputRef}
           type="text"
@@ -125,7 +136,7 @@ export function SearchForm({
           aria-autocomplete="list"
         />
         
-        <div className="absolute right-2 top-1/2 -translate-y-1/2 flex items-center gap-1">
+        <div className="absolute right-2 top-1/2 -translate-y-1/2 flex items-center gap-1 z-10">
           {query && (
             <button
               type="button"

components/search/SearchHistoryDropdown.tsx

@@ -31,41 +31,6 @@ export function SearchHistoryDropdown({
 }: SearchHistoryDropdownProps) {
   const dropdownRef = useRef<HTMLDivElement>(null);
 
-  // Position dropdown below input field
-  useEffect(() => {
-    if (!isOpen || !triggerRef.current || !dropdownRef.current) return;
-
-    const updatePosition = () => {
-      if (!triggerRef.current || !dropdownRef.current) return;
-
-      const inputRect = triggerRef.current.getBoundingClientRect();
-      const viewportHeight = window.innerHeight;
-      const dropdownMaxHeight = 400;
-      const spaceBelow = viewportHeight - inputRect.bottom;
-
-      // Position below input
-      dropdownRef.current.style.top = `${inputRect.bottom + 8}px`;
-      dropdownRef.current.style.left = `${inputRect.left}px`;
-      dropdownRef.current.style.width = `${inputRect.width}px`;
-
-      // Adjust max height if not enough space
-      if (spaceBelow < dropdownMaxHeight) {
-        dropdownRef.current.style.maxHeight = `${spaceBelow - 20}px`;
-      } else {
-        dropdownRef.current.style.maxHeight = `${dropdownMaxHeight}px`;
-      }
-    };
-
-    updatePosition();
-    window.addEventListener('resize', updatePosition);
-    window.addEventListener('scroll', updatePosition, { passive: true });
-
-    return () => {
-      window.removeEventListener('resize', updatePosition);
-      window.removeEventListener('scroll', updatePosition);
-    };
-  }, [isOpen, triggerRef]);
-
   // Scroll highlighted item into view
   useEffect(() => {
     if (highlightedIndex === -1 || !dropdownRef.current) return;
@@ -82,85 +47,105 @@ export function SearchHistoryDropdown({
     }
   }, [highlightedIndex]);
 
-  if (!isOpen || searchHistory.length === 0) {
+  if (!isOpen) {
     return null;
   }
 
   return (
     <div
       ref={dropdownRef}
-      className="search-history-dropdown"
+      className="search-history-dropdown absolute top-full left-0 right-0 mt-2 z-[9999]"
       role="listbox"
       aria-label="搜索历史"
+      onMouseDown={(e) => {
+        // Prevent blur when clicking inside dropdown
+        e.preventDefault();
+      }}
     >
-      {/* Header with clear all button */}
-      <div className="search-history-header">
-        <div className="flex items-center gap-2">
-          <Icons.Clock size={16} className="text-[var(--text-color-secondary)]" />
-          <span className="text-sm font-medium text-[var(--text-color-secondary)]">
-            搜索历史
-          </span>
+      {searchHistory.length === 0 ? (
+        // Empty state
+        <div className="search-history-empty">
+          <Icons.Clock size={32} className="text-[var(--text-color-secondary)] mx-auto mb-2 opacity-50" />
+          <span className="text-sm text-[var(--text-color-secondary)]">暂无搜索历史</span>
         </div>
-        <button
-          type="button"
-          onClick={(e) => {
-            e.stopPropagation();
-            onClearAll();
-          }}
-          className="text-xs text-[var(--accent-color)] hover:underline transition-all"
-          aria-label="清除所有历史"
-        >
-          清除全部
-        </button>
-      </div>
-
-      {/* Divider */}
-      <div className="search-history-divider" />
-
-      {/* History items */}
-      <div className="search-history-list">
-        {searchHistory.map((item, index) => (
-          <div
-            key={`${item.query}-${item.timestamp}`}
-            data-index={index}
-            role="option"
-            aria-selected={index === highlightedIndex}
-            className={`search-history-item ${
-              index === highlightedIndex ? 'highlighted' : ''
-            }`}
-            onClick={() => onSelectItem(item.query)}
-            onMouseEnter={() => {
-              // Visual feedback on hover
-            }}
-          >
-            <div className="flex items-center gap-3 flex-1 min-w-0">
-              <Icons.Search
-                size={16}
-                className="flex-shrink-0 text-[var(--text-color-secondary)]"
-              />
-              <span className="text-[var(--text-color)] truncate flex-1">
-                {item.query}
+      ) : (
+        <>
+          {/* Header with clear all button */}
+          <div className="search-history-header">
+            <div className="flex items-center gap-2">
+              <Icons.Clock size={16} className="text-[var(--text-color-secondary)]" />
+              <span className="text-sm font-medium text-[var(--text-color-secondary)]">
+                搜索历史
               </span>
-              {item.resultCount !== undefined && (
-                <span className="text-xs text-[var(--text-color-secondary)] flex-shrink-0">
-                  {item.resultCount} 个结果
-                </span>
-              )}
             </div>
             <button
               type="button"
               onClick={(e) => {
                 e.stopPropagation();
-                onRemoveItem(item.query);
+                onClearAll();
               }}
-              className="search-history-remove"
-              aria-label={`删除 "${item.query}"`}
+              className="text-xs text-[var(--accent-color)] hover:underline transition-all"
+              aria-label="清除所有历史"
             >
-              <Icons.X size={14} />
+              清除全部
             </button>
           </div>
-        ))}
-      </div>
+
+          {/* Divider */}
+          <div className="search-history-divider" />
+
+          {/* History items */}
+          <div className="search-history-list">
+            {searchHistory.map((item, index) => (
+              <div
+                key={`${item.query}-${item.timestamp}`}
+                data-index={index}
+                role="option"
+                aria-selected={index === highlightedIndex}
+                className={`search-history-item ${
+                  index === highlightedIndex ? 'highlighted' : ''
+                }`}
+                onClick={(e) => {
+                  e.preventDefault();
+                  onSelectItem(item.query);
+                }}
+                onMouseEnter={() => {
+                  // Visual feedback on hover
+                }}
+                tabIndex={0}
+              >
+                <div className="flex items-center gap-3 flex-1 min-w-0">
+                  <Icons.Search
+                    size={16}
+                    className="flex-shrink-0 text-[var(--text-color-secondary)]"
+                  />
+                  <span className="text-[var(--text-color)] truncate flex-1">
+                    {item.query}
+                  </span>
+                  {item.resultCount !== undefined && (
+                    <span className="text-xs text-[var(--text-color-secondary)] flex-shrink-0">
+                      {item.resultCount} 个结果
+                    </span>
+                  )}
+                </div>
+                <button
+                  type="button"
+                  onClick={(e) => {
+                    e.preventDefault();
+                    e.stopPropagation();
+                    onRemoveItem(item.query);
+                  }}
+                  className="search-history-remove"
+                  aria-label={`删除 "${item.query}"`}
+                  tabIndex={0}
+                >
+                  <Icons.X size={14} />
+                </button>
+              </div>
+            ))}
+          </div>
+        </>
+      )}
     </div>
   );
 }

components/search/VideoGrid.tsx

@@ -101,52 +101,53 @@ const VideoCard = memo(({
                <Icons.Film size={64} className="text-[var(--text-color-secondary)] opacity-20" />
             </div>
           
-          {/* Source Badge - Top Left */}
-          {video.sourceName && (
-            <div className="absolute top-2 left-2 z-10">
-              <Badge variant="primary" className="text-xs bg-[var(--accent-color)]">
-                {video.sourceName}
-              </Badge>
-            </div>
-          )}
-          
-          {/* Latency Badge - Top Right */}
-          {video.latency !== undefined && (
-            <div className="absolute top-2 right-2 z-10">
-              <LatencyBadge latency={video.latency} />
-            </div>
-          )}
-          
-          {/* Overlay - Show on hover (desktop) or when active (mobile) */}
-          <div 
-            className={`absolute inset-0 bg-black/60 transition-opacity duration-300 ${
-              isActive ? 'opacity-100 lg:opacity-0 lg:group-hover:opacity-100' : 'opacity-0 lg:group-hover:opacity-100'
-            }`}
-            style={{ 
-              willChange: 'opacity',
-            }}
-          >
-            <div className="absolute bottom-0 left-0 right-0 p-3">
-              {/* Mobile indicator when active */}
-              {isActive && (
-                <div className="lg:hidden text-white/90 text-xs mb-2 font-medium">
-                  再次点击播放 →
-                </div>
-              )}
-              {video.type_name && (
-                <Badge variant="secondary" className="text-xs mb-2">
-                  {video.type_name}
+            {/* Badge Container - Top, spans full width with proper spacing */}
+            <div className="absolute top-2 left-2 right-2 z-10 flex items-start justify-between gap-1">
+              {/* Source Badge - Left */}
+              {video.sourceName && (
+                <Badge variant="primary" className="text-[10px] px-1.5 py-0.5 bg-[var(--accent-color)] flex-shrink-0 max-w-[50%] truncate">
+                  {video.sourceName}
                 </Badge>
               )}
-              {video.vod_year && (
-                <div className="flex items-center gap-1 text-white/80 text-xs">
-                  <Icons.Calendar size={12} />
-                  <span>{video.vod_year}</span>
+              
+              {/* Latency Badge - Right */}
+              {video.latency !== undefined && (
+                <div className="flex-shrink-0">
+                  <LatencyBadge latency={video.latency} className="text-[10px] px-1.5 py-0.5" />
                 </div>
               )}
             </div>
+          
+            {/* Overlay - Show on hover (desktop) or when active (mobile) */}
+            <div 
+              className={`absolute inset-0 bg-black/60 transition-opacity duration-300 ${
+                isActive ? 'opacity-100 lg:opacity-0 lg:group-hover:opacity-100' : 'opacity-0 lg:group-hover:opacity-100'
+              }`}
+              style={{ 
+                willChange: 'opacity',
+              }}
+            >
+              <div className="absolute bottom-0 left-0 right-0 p-3">
+                {/* Mobile indicator when active */}
+                {isActive && (
+                  <div className="lg:hidden text-white/90 text-xs mb-2 font-medium">
+                    再次点击播放 →
+                  </div>
+                )}
+                {video.type_name && (
+                  <Badge variant="secondary" className="text-xs mb-2">
+                    {video.type_name}
+                  </Badge>
+                )}
+                {video.vod_year && (
+                  <div className="flex items-center gap-1 text-white/80 text-xs">
+                    <Icons.Calendar size={12} />
+                    <span>{video.vod_year}</span>
+                  </div>
+                )}
+              </div>
+            </div>
           </div>
-        </div>
 
         {/* Info - Fixed height section */}
         <div className="p-3 flex-1 flex flex-col">

components/ui/LatencyBadge.tsx

@@ -19,9 +19,9 @@ export const LatencyBadge = memo(function LatencyBadge({ latency, className = ''
     <span
       className={`
         inline-flex items-center justify-center
-        px-2 py-0.5 md:px-3 md:py-1
+        px-1.5 py-0.5
         rounded-[var(--radius-full)]
-        text-[10px] md:text-xs font-mono font-semibold
+        text-[10px] font-mono font-semibold
         border
         ${className}
       `}

lib/hooks/useSearchHistory.ts

@@ -44,11 +44,10 @@ export function useSearchHistory(
     if (dropdownTimeoutRef.current) {
       clearTimeout(dropdownTimeoutRef.current);
     }
-    if (recentSearches.length > 0) {
-      setIsDropdownOpen(true);
-      setHighlightedIndex(-1);
-    }
-  }, [recentSearches.length]);
+    // Show dropdown even if there's no history (for consistent UX)
+    setIsDropdownOpen(true);
+    setHighlightedIndex(-1);
+  }, []);
 
   const hideDropdown = useCallback(() => {
     // Delay hiding to allow click events to fire