Fix: Delay style updates by 500ms and preserve Dark Mode palettes

Fix: Add missing QFileInfo header in jobstream.cpp

Fix: Display actual merged file size by tracking final disk size

Fix: Point auto-update checker to user's ArrowDL repository

Fix: Pass application proxy settings to yt-dlp

Add FFmpeg download scripts and bundle FFmpeg to merge media

Fix libwinpthread-1.dll entry point not found

Fix GitHub release permissions 403 error

Fix github action syntax for NSIS setup

Fix GitHub action missing NSIS on windows-latest

Fix gitignore to track yt-dlp.exe

Fix CMakeLists.txt to conditionally install .bat files

Fix gitignore to track necessary install.bat files

Add workflow_dispatch trigger to deployment.yml

Initial commit