Install Qt runtime libraries before the PyPI smoke test

[saudzahirr]

Summary

The v0.1.0 release job failed at its final step:

ImportError: libEGL.so.1: cannot open shared object file: No such file or directory
  File ".../brayer/handlers/pydantic_types.py", line 19, in <module>
    from PySide6 import QtWidgets

The release itself was fine. The upload returned 200 OK and brayer 0.1.0 is live and installable. What broke is the post-publish smoke test: brayer imports PySide6 at package import time, and the publish-to-pypi job runs on a bare ubuntu-latest with no Qt runtime libraries and no display. A red release job here reads as a broken package when it is really a missing system library.

code_test.yml already solved this — it has an Install Qt runtime libraries step and sets QT_QPA_PLATFORM=offscreen at the workflow level. The publish job never got either. This ports both across.

Test plan

• The package list is identical to the one in code_test.yml, which passes import PySide6.QtWidgets on Linux across the whole 3.10–3.14 matrix, including a dedicated Verify Qt imports headlessly step.
• Workflow parses; publish-to-pypi steps are now Download Distributions, Publish to PyPI, Install Qt runtime libraries, Smoke Test on PyPI, with the Qt env vars scoped to the smoke test.
• Not verified by direct reproduction: this is release-triggered only, so PR checks cannot exercise it, and Docker was unavailable locally to reproduce the bare-runner import. The evidence is parity with the passing test matrix, not a local run. It executes for real on the next published release.

Note

libegl1 alone would clear the reported error, but the full list is used deliberately: it matches code_test.yml exactly, so the two stay in step and the smoke test cannot pass while the matrix fails on some other missing .so.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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