CI (.github)

workflows/build.yml defines a single workflow, build, that runs on pushes to main, on pull requests, and on manual dispatch. Runs are grouped per ref and older runs are cancelled.

Two jobs:

• build-uxplay (windows-latest, shell: msys2 {0}) — installs the MSYS2 UCRT64 toolchain and GStreamer stack via msys2/setup-msys2@v2, configures third_party/UxPlay with cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DNO_MARCH_NATIVE=ON, builds build/uxplay.exe and smoke-checks it with uxplay.exe -v. A best-effort bundling step collects the binary, its ntldd -R DLL closure and the GStreamer plugins into dist/ — transitive deps of the plugin DLLs are not yet resolved (Phase 3 work), so dist/ is not guaranteed to run on a machine without MSYS2.
• lint-scripts (ubuntu-latest, only when scripts/** exists) — bash -n on every scripts/*.sh and a [Parser]::ParseFile syntax check on every scripts/*.ps1.

Artifact: dist/ is uploaded as uxplay-win64-ucrt64 (kept 7 days). Download it from the run's summary page: Actions → the build run → Artifacts.