Split macOS player mode into window toggle + floating control

Replace the three-way macOS Player Mode picker (Separate Window /
Floating Window / Inline) with a single 'Play in a separate window'
toggle in Playback settings, and move the always-on-top choice to a
pin button in the player's top bar (window mode only).

Floating was really a transient window property (NSWindow.level), not
a peer of the window/inline structural choice — so it belongs on a live
control, not in Settings. The pin state persists across sessions.

- Replace MacPlayerMode enum with macPlayerSeparateWindow /
  macPlayerFloating bool settings
- Branch runtime presentation and window level off the two bools
- Add pin.fill/pin toggle to MacOSPlayerControlsView top bar
- Update localization; drop obsolete playerMode strings and enum tests

Yattee/Core/Settings/SettingsKey.swift

@@ -45,7 +45,8 @@ enum SettingsKey: String, CaseIterable {
     case resolveShortLinksEnabled
 
     // Platform-specific
-    case macPlayerMode
+    case macPlayerSeparateWindow
+    case macPlayerFloating
     case playerSheetAutoResize
     case listStyle
 
@@ -136,7 +137,8 @@ enum SettingsKey: String, CaseIterable {
     /// in both UserDefaults and iCloud, so each platform family syncs independently.
     var isPlatformSpecific: Bool {
         switch self {
-        case .preferredQuality, .cellularQuality, .allowSoftwareDecodedFormats, .macPlayerMode, .listStyle,
+        case .preferredQuality, .cellularQuality, .allowSoftwareDecodedFormats,
+             .macPlayerSeparateWindow, .macPlayerFloating, .listStyle,
              // Home layout — different UI paradigms per platform
              .homeShortcutOrder, .homeShortcutVisibility, .homeShortcutLayout, .homeShortcutCardStyle,
              .homeShortcutColorfulPalette, .homeShortcutCustomPaletteColors,

Yattee/Core/Settings/SettingsManager+Player.swift

@@ -68,14 +68,30 @@ extension SettingsManager {
     #endif
 
     #if os(macOS)
-    var macPlayerMode: MacPlayerMode {
+    /// Whether the expanded player opens in a separate window (vs. an inline sheet).
+    /// Default is `true`.
+    var macPlayerSeparateWindow: Bool {
         get {
-            if let cached = _macPlayerMode { return cached }
-            return MacPlayerMode(rawValue: string(for: .macPlayerMode) ?? "") ?? .window
+            if let cached = _macPlayerSeparateWindow { return cached }
+            return bool(for: .macPlayerSeparateWindow, default: true)
         }
         set {
-            _macPlayerMode = newValue
-            set(newValue.rawValue, for: .macPlayerMode)
+            _macPlayerSeparateWindow = newValue
+            set(newValue, for: .macPlayerSeparateWindow)
+        }
+    }
+
+    /// Whether the separate player window floats above other windows (always on top).
+    /// Toggled live from the player's top-bar pin button and remembered across sessions.
+    /// Default is `false`.
+    var macPlayerFloating: Bool {
+        get {
+            if let cached = _macPlayerFloating { return cached }
+            return bool(for: .macPlayerFloating, default: false)
+        }
+        set {
+            _macPlayerFloating = newValue
+            set(newValue, for: .macPlayerFloating)
         }
     }
 

Yattee/Core/Settings/SettingsTypes.swift

@@ -201,37 +201,6 @@ enum DownloadQuality: String, CaseIterable, Codable, Sendable {
     }
 }
 
-// MARK: - macOS Player Mode
-
-#if os(macOS)
-enum MacPlayerMode: String, CaseIterable, Codable {
-    case window
-    case floatingWindow
-    case inline
-
-    var displayName: String {
-        switch self {
-        case .window: return String(localized: "settings.playback.macOS.playerMode.window")
-        case .floatingWindow: return String(localized: "settings.playback.macOS.playerMode.floatingWindow")
-        case .inline: return String(localized: "settings.playback.macOS.playerMode.inline")
-        }
-    }
-
-    /// Whether this mode uses a separate window (vs sheet/inline)
-    var usesWindow: Bool {
-        switch self {
-        case .window, .floatingWindow: return true
-        case .inline: return false
-        }
-    }
-
-    /// Whether the window should float above other windows
-    var isFloating: Bool {
-        self == .floatingWindow
-    }
-}
-#endif
-
 // MARK: - Haptic Feedback
 
 /// Intensity levels for haptic feedback.

Yattee/Core/SettingsManager.swift

@@ -72,7 +72,8 @@ final class SettingsManager {
     var _preferPortraitBrowsing: Bool?
     #endif
     #if os(macOS)
-    var _macPlayerMode: MacPlayerMode?
+    var _macPlayerSeparateWindow: Bool?
+    var _macPlayerFloating: Bool?
     var _playerSheetAutoResize: Bool?
     #endif
 
@@ -456,7 +457,8 @@ final class SettingsManager {
         _syncSearchHistory = nil
         _searchHistoryLimit = nil
         #if os(macOS)
-        _macPlayerMode = nil
+        _macPlayerSeparateWindow = nil
+        _macPlayerFloating = nil
         _playerSheetAutoResize = nil
         #endif
         // miniPlayerShowVideo and miniPlayerVideoTapAction moved to preset