Extracts yt-dlp argv construction out of download.ts into its own
electron-free module (src/main/buildArgs.ts) so it can be exercised by
vitest without spinning up Electron, plus a real-download integration
test (skipped by default; opt in with AEROFETCH_REAL_DOWNLOAD=1) that
spawns the bundled yt-dlp.exe/ffmpeg.exe against its argv. download.ts
isn't wired up to it yet — that lands with the next commit.
This was done in an earlier local session but never actually committed,
even though download.ts has imported from it since the Phase A commit
(bb5dd6c) — the build had been relying on an uncommitted local file.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
debont80
26cd7fc7b0