feat: Refactor playlist management, error handling, and testing infrastructure

- Improved playlist item handling with pagination, error logging, and dedicated request hooks.
- Consolidated reusable helpers for track ID normalization, playlist validation, and removal logic.
- Enhanced error handling by introducing `PlaylistNotFound` and `UserNotAuthenticated` exceptions.
- Refined Pytest `qapp` fixture for headless CI compatibility and session-scoped reuse.
- Replaced redundant fixtures in multiple test files for consistency.
- Improved playlist management GUI with detailed debug logging for notifications and operations.
- Added `deptry` configuration to handle transitive dependencies and ignored exclusions.
- Updated Pytest and Tox configurations for consistent environment setup during CI/CD runs.

1 files changed, 0 insertions, 10 deletions

diff --git a/tests/test_settings_dialog_structure.py b/tests/test_settings_dialog_structure.py
index 3c492a5..3c16238 100644
--- a/tests/test_settings_dialog_structure.py
+++ b/tests/test_settings_dialog_structure.py
@@ -1,20 +1,10 @@
 """Tests for the settings dialog category structure and organization."""
 
-import pytest
 from PySide6 import QtCore, QtWidgets
 
 from tidal_dl_ng.ui.dialog_settings import Ui_DialogSettings
 
 
-@pytest.fixture
-def qapp():
-    """Create QApplication instance for tests."""
-    app = QtWidgets.QApplication.instance()
-    if app is None:
-        app = QtWidgets.QApplication([])
-    yield app
-
-
 class TestSettingsDialogStructure:
     """Test the structural integrity of the settings dialog."""