ui: replace file closed dialog with status bar message

src/teletext/ui.py

@@ -6,7 +6,7 @@ from PyQt6.QtWidgets import (
     QCheckBox, QDialog, QGridLayout
 )
 from PyQt6.QtGui import QAction, QKeyEvent, QPainter, QBrush, QColor
-from PyQt6.QtCore import Qt, QRect
+from PyQt6.QtCore import Qt, QRect, QTimer
 
 from .io import load_t42, save_t42
 from .renderer import TeletextCanvas, create_blank_packet
@@ -476,8 +476,8 @@ class MainWindow(QMainWindow):
         self.undo_stack.clear()
         self.redo_stack.clear()
         
-        QMessageBox.information(self, "Closed", "File closed.")
-        self.status_label.setText("Ready")
+        self.status_label.setText("File closed.")
+        QTimer.singleShot(3000, lambda: self.status_label.setText("Ready"))
         self.set_modified(False)