Leave the root hero.svg out of a remote page's plates

Andrew Dunnrequested to merge
templates/loader-brand-art into main

What does this MR do and why?

I want a docs site that reads a conforming profile to build, because its README opens with the root hero.svg, whose <style> block stops the build. The loader now leaves that one image out; every other SVG is still a plate.

flowchart LR
  A["Standalone SVG image"] --> B{"Root hero.svg?"}
  B -->|yes| C["Left out, logged"]
  B -->|no| D{"Sanitizer clean?"}
  D -->|yes| E["Inline plate"]
  D -->|no| F["Build stops"]

References

None.

Standards affected

None.

Exemption implications

None.

Test plan

  • just guard, just validate, just check, just build, just agent and the template's astro check pass.
  • Mocked repository: hero left out, clean plate inlined, unreferenced styled SVG untouched; build passes.
  • A styled plate, or a styled sub/hero.svg, still stops the build.
  • The same repository on main stops on hero.svg.
  • Not tested: a live GitLab project.

An AI tool wrote this change and ran the checks above.

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