fix: expand website hero artwork

[BramVR]

Summary

• replace the website hero with an ImageGen outpaint that preserves the controller and all three Blender Sessions
• add dark breathing room around the composition so the upper cube Session remains bright and fully visible
• replace the radial crop with a soft vertical fade and update image metadata to the generated dimensions

Proof

• node scripts/build-site.mjs
• node scripts/check-site.mjs
• uv run ruff check .
• uv run pytest — 92 passed, 4 skipped
• checked in the in-app browser at 1116 × 1044 with no horizontal overflow
• trufflehog secret scan clean; browser-based visual review completed

[Copilot]

Pull request overview

Updates the project website’s hero image and presentation so the full “controller + three Sessions” composition remains visible and better framed across the responsive layout, while keeping build/check automation aligned with the new asset.

Changes:

• Swapped the hero image asset to blendersessiond-hero-v2.png and updated all corresponding SEO/social metadata dimensions.
• Replaced the hero’s radial mask crop with a soft vertical fade via mask-image / -webkit-mask-image.
• Updated the site build/check scripts and Pages workflow triggers to include the new hero asset; documented the change in the changelog.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
website/styles.css	Switches hero image masking from a radial crop to a vertical fade gradient.
website/index.html	Updates hero asset references and OpenGraph/Twitter/JSON-LD metadata to the new image + dimensions.
scripts/check-site.mjs	Adjusts required output files to validate the new hero image is present in the built site.
scripts/build-site.mjs	Copies the updated hero asset into the built site output.
CHANGELOG.md	Notes the expanded hero artwork change under “Changed”.
.github/workflows/pages.yml	Ensures Pages builds trigger when the new hero asset changes.

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