ui: frost playback titles and hide chrome on pointer exit

README.md

@@ -190,7 +190,7 @@ The empty player uses the same HUD-glass material, 12-point rounded corners, and
 
 With no media open, the full window uses native behind-window HUD glass to frost the desktop and windows beneath it. The idle Metal surface stays attached but hidden; opening media restores a solid black background and letterboxing, and closing it restores the frosted background. macOS controls the material’s appearance, including Reduce Transparency.
 
-Normal and compact titlebars have no separate glass strip or separator: content extends beneath AppKit’s transparent titlebar using `fullSizeContentView`, `titlebarAppearsTransparent`, and `titlebarSeparatorStyle = .none`. The title and pin sit directly over the existing background or video, with native traffic lights and window dragging preserved.
+Normal and compact titlebars have no full-width glass strip or separator: content extends beneath AppKit’s transparent titlebar using `fullSizeContentView`, `titlebarAppearsTransparent`, and `titlebarSeparatorStyle = .none`. Normal-mode titles and their file icons have a small rounded HUD-glass backdrop for legibility; the pin stays over the existing background. Compact titles sit in a controls-style frosted box with 8-point top/right insets, matching the controller’s bottom inset. Long titles truncate in the middle and fit the 160-point minimum width. Native traffic lights and window dragging are preserved.
 
 Opening video fits the window to its display aspect ratio, including non-square pixels, and constrains subsequent window resizing. Fullscreen retains the normal letterboxed renderer; audio-only playback and close release the aspect constraint. Extreme ratios that cannot fit both the screen and usable controls keep a freely resizable letterboxed window.
 
@@ -212,7 +212,7 @@ Frame stepping uses decoded presentation timestamps, not an average-FPS time off
 
 - Existing shortcuts remain: **⌘O** opens files, **←/→** seeks five seconds, **↑/↓** adjusts volume by five percent, **⌃⌘F** toggles fullscreen, and **Esc** leaves fullscreen. Double-clicking normal-mode video also toggles fullscreen.
 - The timeline slider seeks on release and holds the requested position until queued seeking finishes. Both slider tracks span the native thumb-center travel range; the orange fill ends at the current volume thumb center. The volume thumb is opaque light gray.
-- **Single-click normal-mode video:** hide controls. Mouse movement reveals them; they fade after 2.5 seconds, including while paused. Hovering the normal titlebar or either controller, dragging, seeking, an inactive normal-mode window, errors, or VoiceOver keep them visible. Compact controls can fade while another app is active; hovering its video reveals them without hiding the desktop cursor.
+- **Single-click normal-mode video:** hide controls. Mouse movement reveals them; video controls fade after 2.5 seconds, including while paused. While the pointer is inside, hovering the normal titlebar or either controller and an inactive normal-mode window keep them visible; audio-only controls remain visible. Leaving the window starts the title/control fade immediately in either mode, including paused, loading, and audio-only playback; late hover/focus updates do not reshow them. Reentry reveals them. Active dragging/seeking, errors, empty-window opening actions, and VoiceOver remain protected; a drag released or seek acknowledged outside hides the chrome. Tab navigation can explicitly reveal controls without moving the pointer. Compact hover and window exit never hide the desktop cursor.
 - Click the right-hand time label to switch between total and remaining time. The titlebar pin keeps the window on top.
 
 Only implemented actions have controls; there are no placeholder playlist, subtitle, or settings buttons. Layout and interaction references: IINA v1.5.0's [floating controller](https://github.com/iina/iina/blob/v1.5.0/iina/OSCFloatingView.swift), [preferences](https://github.com/iina/iina/blob/v1.5.0/iina/Preference.swift), and [titlebar](https://github.com/iina/iina/blob/v1.5.0/iina/Titlebar.swift).