Refactor windowed mode and subprocess handling

Removed redundant windowed mode setup from main.py and simplified subprocess creation flags logic across core and GUI modules. Centralized subprocess creation flags usage, eliminated custom run_subprocess_hidden wrapper, and improved logging handler setup for better compatibility with windowed applications.

src/core/ytsage_yt_dlp.py

@@ -1,7 +1,6 @@
 import os
 import shutil
 import subprocess
-import sys
 from pathlib import Path
 from typing import Optional
 
@@ -501,22 +500,10 @@ def check_ytdlp_binary() -> Optional[Path]:
         # Use subprocess to check if yt-dlp is available
         if OS_NAME == "Windows":
             # On Windows, use 'where' command and hide console window
-            # For windowed applications, use additional flags to prevent console window flicker
-            creation_flags = SUBPROCESS_CREATIONFLAGS
-            if getattr(sys, 'frozen', False):
-                # Running as compiled executable - use additional flags
-                creation_flags |= subprocess.CREATE_NEW_PROCESS_GROUP | subprocess.DETACHED_PROCESS
+            # Extra logic moved to src\utils\ytsage_constants.py
 
             result = subprocess.run(
-                ["where", "yt-dlp"], 
-                capture_output=True, 
-                text=True, 
-                check=False, 
-                creationflags=creation_flags,
-                # Additional parameters to suppress console
-                stdin=subprocess.DEVNULL,
-                stdout=subprocess.PIPE,
-                stderr=subprocess.PIPE
+                ["where", "yt-dlp"], capture_output=True, text=True, check=False, creationflags=SUBPROCESS_CREATIONFLAGS
             )
             if result.returncode == 0 and result.stdout.strip():
                 yt_dlp_path = result.stdout.strip().split("\n")[0]
@@ -547,22 +534,9 @@ def check_ytdlp_installed() -> bool:
         if ytdlp_path:
             # Try to run yt-dlp --version to verify it's working
             try:
-                # For windowed applications, use additional flags to prevent console window flicker
-                creation_flags = SUBPROCESS_CREATIONFLAGS
-                if getattr(sys, 'frozen', False):
-                    # Running as compiled executable - use additional flags
-                    creation_flags |= subprocess.CREATE_NEW_PROCESS_GROUP | subprocess.DETACHED_PROCESS
-
+                # Extra logic moved to src\utils\ytsage_constants.py
                 result = subprocess.run(
-                    [ytdlp_path, "--version"], 
-                    capture_output=True, 
-                    text=True, 
-                    timeout=5, 
-                    creationflags=creation_flags,
-                    # Additional parameters to suppress console
-                    stdin=subprocess.DEVNULL,
-                    stdout=subprocess.PIPE,
-                    stderr=subprocess.PIPE
+                    [ytdlp_path, "--version"], capture_output=True, text=True, timeout=5, creationflags=SUBPROCESS_CREATIONFLAGS
                 )
                 return result.returncode == 0
             except Exception: