Improve Windows installer, shortcuts, GUI reliability, and README

run_app.bat

@@ -3,10 +3,11 @@ REM Journey FM Playlist Creator - Windows Launcher
 
 cd /d "%~dp0"
 
-REM Activate virtual environment if it exists
-if exist .venv\Scripts\activate.bat (
-    call .venv\Scripts\activate.bat
+REM Prefer virtual environment pythonw if it exists
+if exist .venv\Scripts\pythonw.exe (
+    .venv\Scripts\pythonw.exe journey_fm_app.py
+    exit /b %errorlevel%
 )
 
-REM Run the application without console window
+REM Fallback to PATH pythonw
 pythonw journey_fm_app.py