Lay groundwork for the player panels redesign

Phase 0 of the panels redesign, extraction only, no behavior changes:

- Unify comments loading on PlayerState: loadComments/loadMoreComments
  become the single loader, used by both the player sheet preload and
  the comments overlay (which previously had its own duplicate copy).
- Extract PanelResizeGrabber from FloatingDetailsPanel into the new
  Views/Player/Panels/ directory.
- Extract the shared queue list from QueueManagementSheet into
  QueueListView plus QueuePlaybackActions, reused by the tvOS panel.
- Remove the no-op wideLayoutPanelAlignment accessor from the settings
  view model; the player reads the panel side from SettingsManager, so
  the preset field was dead. The Codable field stays so old presets
  decode.

Yattee/Models/PlayerControls/PlayerControlsLayout.swift

@@ -33,8 +33,9 @@ struct PlayerControlsLayout: Codable, Hashable, Sendable {
     /// Mini player settings. Optional for backward compatibility.
     var miniPlayerSettings: MiniPlayerSettings?
 
-    /// Wide layout panel alignment. Optional for backward compatibility.
-    /// When nil, uses the global setting from SettingsManager.
+    /// Unused: the player reads the panel side from SettingsManager
+    /// (`floatingDetailsPanelSide`). Kept only so old presets that saved this
+    /// field still decode.
     var wideLayoutPanelAlignment: FloatingPanelSide?
 
 
@@ -91,13 +92,6 @@ struct PlayerControlsLayout: Codable, Hashable, Sendable {
         miniPlayerSettings ?? .default
     }
 
-    // MARK: - Wide Layout Panel Settings
-
-    /// Returns the effective wide layout panel alignment, using right as default if not set.
-    var effectiveWideLayoutPanelAlignment: FloatingPanelSide {
-        wideLayoutPanelAlignment ?? .left
-    }
-
     // MARK: - Defaults
 
     /// Default layout matching the current hardcoded player controls.