fix(lint): Remove unused imports to fix pyflakes errors

Fixed pyflakes warnings:

1. core/overlay.py:
   - Removed unused 'sys' import

2. core/settings_manager.py:
   - Removed unused 'typing.Optional' import

3. core/configuration.py:
   - Removed unused 'typing.Optional' import

4. core/ui/components.py:
   - Removed unused 'PySide6.QtCore.Qt' import
   - Removed unused 'PySide6.QtGui.QColor' import
   - Removed unused '..configuration.AppConfig' import

These were warnings (not actual errors), but pyflakes considers them failures.

All files now pass pyflakes linting without warnings.

Author: Ian-bug

core/configuration.py

@@ -1,5 +1,5 @@
 from dataclasses import dataclass, field
-from typing import Dict, List, Optional
+from typing import Dict, List
 from PySide6.QtGui import QColor
 from PySide6.QtWidgets import QApplication
 from .logging_config import get_logger

core/overlay.py

@@ -1,4 +1,3 @@
-import sys
 import time
 from collections import deque
 from typing import Dict, Set, Optional

core/settings_manager.py

@@ -1,7 +1,6 @@
 import configparser
 import os
 import shutil
-from typing import Optional
 from PySide6.QtCore import QObject, Signal
 from .configuration import AppConfig
 from .logging_config import get_logger

core/ui/components.py

@@ -3,9 +3,7 @@
     QWidget, QVBoxLayout, QHBoxLayout, QLabel, QSpinBox,
     QComboBox, QGroupBox, QPushButton, QCheckBox, QColorDialog
 )
-from PySide6.QtCore import Qt, Signal
-from PySide6.QtGui import QColor
-from ..configuration import AppConfig
+from PySide6.QtCore import Signal
 from ..settings_manager import SettingsManager
 from ..qt_utils import signals_blocked