Release 0.3.0

[FlorianRappl]

Types of Changes

Prerequisites

Please make sure you can check the following two boxes:

• I have read the CONTRIBUTING document
• My code follows the code style of this project

Contribution Type

What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue, please reference the issue id)
• New feature (non-breaking change which adds functionality, make sure to open an associated issue first)
• Breaking change (fix or feature that would cause existing functionality to change)
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Description

This pull request introduces significant improvements to the CI workflow and documentation, with a strong focus on ensuring reliable, cross-platform visual testing and snapshot baseline management. The changes update the test matrix to run on all major platforms, add strict versioning for dependencies, and introduce a dedicated workflow for updating visual baselines. Additionally, the documentation is expanded with detailed explanations of the renderer's architecture and font/SVG/gradient handling.

CI/CD and Testing Improvements:

• The CI workflow (ci.yml) is refactored to run visual and unit tests on a matrix of platforms (Linux, Windows, macOS), ensuring that platform-specific rendering differences are caught and managed. Baselines are now enforced per-platform, and artifact handling is improved for clarity and completeness.
• Strict versioning for AngleSharp and AngleSharp.Css is introduced as environment variables, ensuring reproducibility and easier upgrades.
• A new workflow (update-snapshots.yml) is added to automate the regeneration and collection of visual snapshot baselines across all supported platforms, keeping the baseline matrix in sync and enabling contributors to update baselines reliably.

Dependency and Tooling Updates:

• The .NET tool configuration switches from fallout.cli to fallout.globaltool and updates the version, aligning with current tooling standards.

Documentation Enhancements:

• The architecture section in AGENTS.md is expanded with detailed explanations of font resolution, SVG rasterization, table layout, and CSS/SVG gradient support, clarifying complex implementation details and expected behaviors for contributors.

These changes collectively improve test reliability, developer onboarding, and the maintainability of the renderer project.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

✅ FlorianRappl
✅ lahma
❌ github-actions[bot]
_{You have signed the CLA already but the status is still pending? Let us recheck it.}