Rework tvOS player controls and settings sheet

Replace the tvOS bottom action bar with Settings / Info / Comments /
Next / Close. Settings reuses QualitySelectorView (video, audio,
subtitles, speed); Comments opens TVDetailsPanel directly on the
comments tab; Close stops playback and dismisses.

Debug button is hidden by default and can be re-enabled via a new
tvOS-only Advanced Settings > Developer toggle.

Present the settings sheet as a fullScreenCover with a centered
material card, fix the "Normal" hyphenation, and restyle row selection
throughout the quality selector on tvOS: per-row rounded backgrounds
with focus tint + stroke, vertical spacing instead of dividers, and a
focusable speed-rate menu.

Yattee/Core/Settings/SettingsKey.swift

@@ -93,6 +93,7 @@ enum SettingsKey: String, CaseIterable {
     // Advanced
     case showAdvancedStreamDetails
     case showPlayerAreaDebug
+    case showTVDebugButton
     case verboseMPVLogging
     case verboseRemoteControlLogging
     case mpvBufferSeconds

Yattee/Core/Settings/SettingsManager+Advanced.swift

@@ -39,6 +39,19 @@ extension SettingsManager {
         }
     }
 
+    /// Whether to show the Debug button in the tvOS player bottom controls.
+    /// Opens the MPV debug overlay. Default is false (hidden).
+    var showTVDebugButton: Bool {
+        get {
+            if let cached = _showTVDebugButton { return cached }
+            return bool(for: .showTVDebugButton, default: false)
+        }
+        set {
+            _showTVDebugButton = newValue
+            set(newValue, for: .showTVDebugButton)
+        }
+    }
+
     /// Whether verbose MPV rendering logging is enabled.
     /// When enabled, logs detailed OpenGL context, framebuffer, and display link state
     /// to help diagnose rendering issues. Default is false (disabled).