[UI] Ensure mouse auto-hide works regardless of full screen

src/xenia/app/emulator_window.cc

@@ -351,6 +351,9 @@ void EmulatorWindow::OnEmulatorInitialized() {
   // Start periodic child process checking if this is UI process
   if (!is_game_process_) {
     ScheduleChildProcessCheck();
+  } else {
+    // Game process: enable cursor auto-hide
+    window_->SetCursorVisibility(ui::Window::CursorVisibility::kAutoHidden);
   }
 
   emulator_initialized_ = true;
@@ -1459,7 +1462,6 @@ void EmulatorWindow::SetFullscreen(bool fullscreen) {
     return;
   }
   window_->SetFullscreen(fullscreen);
-  window_->SetCursorVisibility(ui::Window::CursorVisibility::kAutoHidden);
 }
 
 void EmulatorWindow::ToggleFullscreen() {

src/xenia/ui/window_qt.cc

@@ -259,8 +259,8 @@ bool QtWindow::OpenImpl() {
   CursorVisibility cursor_visibility = GetCursorVisibility();
   if (cursor_visibility == CursorVisibility::kAutoHidden) {
     cursor_auto_hide_last_pos_ = QCursor::pos();
-    cursor_currently_auto_hidden_ = true;
-    UpdateCursorVisibility();
+    // Start the auto-hide timer immediately
+    SetCursorAutoHideTimer();
   } else if (cursor_visibility == CursorVisibility::kHidden) {
     UpdateCursorVisibility();
   }