fix(schema, vibe): share Svelte runtime in Pages build

[johanpel]

Description

Externalize Svelte from the schema-viewer bundle so the viewer and custom node components share one runtime in production. This fixes the null nodes crash on GitHub Pages.

Also suppress the unnecessary /favicon.ico request.

Related Issues

Follow-up to #451.

Testing

• Full experimental schema CI
• Pages-equivalent headless browser test: HTTP 200, graph rendered, no console or page errors
• License and whitespace checks

Written by Codex.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: QUIET

Plan: Enterprise

Run ID: 59da2c94-a687-4a6c-9cf5-eaea8245d736

📥 Commits

Reviewing files that changed from the base of the PR and between 8acccff and f07adc0.

📒 Files selected for processing (2)

• experimental/vibe/ui/schema-explorer/index.html
• experimental/vibe/ui/schema-viewer/vite.config.ts

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📝 Walkthrough

Walkthrough

The schema explorer now declares an empty favicon. The schema viewer build externalizes svelte and svelte/* modules through Rolldown configuration.

Changes

Schema explorer metadata

Layer / File(s)	Summary
Favicon declaration experimental/vibe/ui/schema-explorer/index.html	Adds an empty data:, favicon link to the HTML head.

Schema viewer build configuration

Layer / File(s)	Summary
Svelte module externalization experimental/vibe/ui/schema-viewer/vite.config.ts	Configures Rolldown to exclude svelte and svelte/* modules from bundling.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• rapidsai/quent#389: Adds a related favicon declaration in another UI HTML file.
• rapidsai/quent#451: Introduced the modified schema explorer HTML and schema viewer Vite configuration files.

Suggested reviewers: cmatzenbach, dhruv9vats, johallar

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: sharing the Svelte runtime in the Pages build.
Description check	✅ Passed	The description covers the change, related issue, testing, and impact; the optional screenshots section is not required.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[johanpel]

/merge