Update Windows and Linux FFmpeg source locks to BtbN 8.1.2-22-g94138f6973 from autobuild-2026-07-06-14-19.
Replace the bundled macOS Apple Silicon FFmpeg binary with Martin Riedl snapshot N-125450-gfad2e0bc50 and record its verified checksum.
Teach the update checker to compare FFmpeg provider builds separately from upstream stable releases so future refreshes are not missed.
Keep yt-dlp pinned at the current official stable 2026.07.04 and update Vitest to 4.1.10 so the release update gate stays clean.
Update yt-dlp to 2026.07.04 and refresh the bundled macOS runtime plus engine locks.
Route every non-media download through aria2 by removing the native HTTP fallback path, native GID handling, and the old direct-download harness.
Retry transient aria2 startup/RPC failures before failing, then show the real last error in the download row and Properties modal so Windows failures are diagnosable instead of silent.
Refresh docs and tests around the aria2-only file-download contract, and advance the Firefox extension submodule to its published wording cleanup.
Refresh the official Deno sidecar pin to v2.9.1 after checking the upstream release notes.
Update Windows and Linux archive checksums in engine-sources.lock.json and replace the bundled macOS arm64 executable with the official v2.9.1 artifact.
- update npm dependencies, including Vite 8.1.0 and TypeScript 6.0.3
- update bundled Deno engine locks and macOS arm64 binary to 2.8.3
- add npm run check:updates for npm and engine freshness checks
- ignore local agent/planning notes and remove tracked internal docs
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