typos and pylance

src/window/terminal.py

@@ -13,7 +13,7 @@ from pathlib import Path
 from typing import Any, Callable
 
 # External library imports
-from PySide6.QtWidgets import QWidget, QVBoxLayout, QTextEdit, QLineEdit
+from PySide6.QtWidgets import QWidget, QVBoxLayout, QTextEdit, QLineEdit, QMainWindow
 from PySide6.QtCore import QProcess, Qt, QThread, Signal
 
 from file_ext_registration import register_file_association, is_windows_admin
@@ -124,7 +124,7 @@ class TerminalWindow(QWidget):
 
     def cmd_update(self, *args: Any) -> str:
         main_win = self.parent()
-        if not isinstance(main_win, QWidget):
+        if not isinstance(main_win, QMainWindow):
             return "[Error] Main window context not found."
         
         self.updater = UpdateManager(