Address code quality review issues across multiple files

Sources/LuminateCore/PlayerState.swift

@@ -21,7 +21,7 @@
 
 import Foundation
 
-public struct PlayerState: Hashable {
+public struct PlayerState: Hashable, Sendable {
 
     public var itemId: String
     public var mediaSourceId: String

Sources/LuminatePlayer/PlayerControls.swift

@@ -20,9 +20,7 @@
 //
 
 import Adwaita
-import LuminateCore
 import LuminateUI
-import LuminateDI
 
 public struct PlayerControls: View {
 
@@ -106,6 +104,7 @@ public struct PlayerControls: View {
                     // Volume popover — future
                 }
                 .style("flat")
+                .insensitive()
 
                 Button(icon: .default(icon: .viewFullscreen)) {
                     onFullscreen()

Sources/LuminatePlayer/PlayerView.swift

@@ -26,6 +26,11 @@ import LuminateDI
 import CModules
 import CAdw
 
+final class PlayerTasks {
+    var progress: Task<Void, Never>?
+    var controls: Task<Void, Never>?
+}
+
 public struct PlayerView: View {
 
     public var playerState: PlayerState
@@ -38,6 +43,9 @@ public struct PlayerView: View {
     @State private var position: Double = 0
     @State private var duration: Double = 0
     @State private var showControls = true
+    @State private var isFullscreen = false
+    @State private var mpvWidget: OpaquePointer?
+    @State private var tasks = PlayerTasks()
 
     public init(playerState: PlayerState, onClose: @escaping () -> Void) {
         self.playerState = playerState
@@ -49,7 +57,8 @@ public struct PlayerView: View {
             url: playerState.streamURL.absoluteString,
             isPlaying: $isPlaying,
             position: $position,
-            duration: $duration
+            duration: $duration,
+            onWidgetCreated: { ptr in mpvWidget = ptr }
         )
         .vexpand(true)
         .hexpand(true)
@@ -105,8 +114,8 @@ public struct PlayerView: View {
     }
 
     private func stopPlayback() {
-        progressTask?.cancel()
-        controlsTask?.cancel()
+        tasks.progress?.cancel()
+        tasks.controls?.cancel()
         Task {
             try? await client.reportPlaybackStopped(
                 info: .init(
@@ -120,7 +129,7 @@ public struct PlayerView: View {
     }
 
     private func startProgressTimer() {
-        progressTask = Task {
+        tasks.progress = Task {
             while !Task.isCancelled {
                 try? await Task.sleep(for: .seconds(10))
                 try? await client.reportPlaybackProgress(
@@ -141,22 +150,23 @@ public struct PlayerView: View {
         }
     }
 
-    @State private var progressTask: Task<Void, Never>?
-    @State private var controlsTask: Task<Void, Never>?
-
     // MARK: - Seeking
 
     private func seekBy(_ seconds: Double) {
+        guard let mpvWidget else { return }
+        mpv_widget_seek_relative(mpvWidget, seconds)
     }
 
     private func seekTo(_ position: Double) {
+        guard let mpvWidget else { return }
+        mpv_widget_seek_absolute(mpvWidget, position)
     }
 
     // MARK: - Controls visibility
 
     private func startControlsTimer() {
-        controlsTask?.cancel()
-        controlsTask = Task {
+        tasks.controls?.cancel()
+        tasks.controls = Task {
             try? await Task.sleep(for: .seconds(3))
             showControls = false
         }
@@ -165,6 +175,15 @@ public struct PlayerView: View {
     // MARK: - Fullscreen
 
     private func toggleFullscreen() {
+        guard let widget = mpvWidget else { return }
+        let root = gtk_widget_get_root(widget.cast())
+        guard let root else { return }
+        if isFullscreen {
+            gtk_window_unfullscreen(root.cast())
+        } else {
+            gtk_window_fullscreen(root.cast())
+        }
+        isFullscreen.toggle()
     }
 
 }
@@ -186,11 +205,14 @@ struct VideoPlayerWidget: Widget {
     @Binding var position: Double
     @Binding var duration: Double
 
-    init(url: String?, isPlaying: Binding<Bool>, position: Binding<Double>, duration: Binding<Double>) {
+    var onWidgetCreated: ((OpaquePointer) -> Void)?
+
+    init(url: String?, isPlaying: Binding<Bool>, position: Binding<Double>, duration: Binding<Double>, onWidgetCreated: ((OpaquePointer) -> Void)? = nil) {
         self.url = url
         self._isPlaying = isPlaying
         self._position = position
         self._duration = duration
+        self.onWidgetCreated = onWidgetCreated
     }
 
     func container<Data>(data: WidgetData, type: Data.Type) -> ViewStorage
@@ -255,6 +277,10 @@ struct VideoPlayerWidget: Widget {
                 GConnectFlags(rawValue: 1))
         }
 
+        if let ptr = storage.opaquePointer, let onWidgetCreated {
+            onWidgetCreated(ptr)
+        }
+
         for function in appearFunctions {
             function(storage, data)
         }

Sources/LuminateUI/Components/SeekBar.swift

@@ -61,7 +61,7 @@ public struct SeekBar: Widget {
     public func container<Data>(data: WidgetData, type: Data.Type) -> ViewStorage
     where Data: ViewRenderData {
         let widgetPtr = gtk_scale_new_with_range(
-            GtkOrientation(rawValue: 0)!,
+            .GTK_ORIENTATION_HORIZONTAL,
             range.lowerBound,
             range.upperBound,
             1.0