fix(windows): resync embedded player geometry after restore

On Windows, transitioning the top-level window through
minimize → maximize left the embedded mpv HWND offset a few pixels
up-and-left. Nudge the native QWindow.width on visibility changes to
force a SetWindowPos.

Author: trin94

qt/qml/views/player/MpvqcPlayerWindows.qml

@@ -7,5 +7,29 @@ import QtQuick
 import pyobjects
 
 WindowContainer {
+    id: root
+
     window: MpvWindowPyObject {}
+
+    // Workaround: on Windows, when the top-level transitions through
+    // minimize → maximize, the embedded child HWND ends up offset by a few
+    // pixels up-and-left from its correct position. Nudging the native
+    // QWindow.width forces a SetWindowPos on the child and corrects it.
+    Connections {
+        target: root.Window.window
+
+        function onVisibilityChanged(visibility: int): void {
+            if (visibility !== Window.Minimized) {
+                Qt.callLater(root._resyncChildGeometry);
+            }
+        }
+    }
+
+    function _resyncChildGeometry(): void {
+        const w = root.width;
+        if (w > 1) {
+            root.window.width = w - 1;
+            root.window.width = w;
+        }
+    }
 }