Improve handling of console window in windowed apps

Suppresses console window flicker for PyInstaller windowed applications by redirecting stdout and stderr in main.py. Updates logging setup to avoid console output in windowed mode and adds fallback error logging. Suppresses pkg_resources deprecation warnings to further reduce unwanted console output.

src/core/ytsage_utils.py

@@ -4,8 +4,12 @@ import subprocess
 import sys
 import tempfile
 import time
+import warnings
 from pathlib import Path
 
+# Suppress the pkg_resources deprecation warning to prevent console window flicker
+warnings.filterwarnings("ignore", message=".*pkg_resources is deprecated.*", category=UserWarning)
+
 import pkg_resources
 import requests
 from packaging import version