Fix stale Models docs links in config panel

[siewcapital]

Summary

• update the Models section learn-more links for Chat, Autocomplete, and Edit to the current ide-extensions/.../quick-start docs routes
• update model setup links in the same section to ide-extensions/.../model-setup
• add a focused regression test to verify all six links point at the expected routes and do not contain /docs/

Why

The links in the Models panel were still pointing at older paths. This aligns the UI with the current docs structure and prevents regressions.

Closes #11126.

Validation

• npm test -- src/pages/config/sections/ModelsSection.test.tsx (from gui/) → fails in this local env due to unresolved transitive module imports from core test graph (partial-json)
• git diff --check

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Summary by cubic

Fixes stale docs links in the Models config panel by switching all "Learn more" and model setup URLs to the current ide-extensions/.../quick-start and ide-extensions/.../model-setup routes, centralizing them in MODEL_DOCS_URLS, and removing a redundant test to avoid duplicate truth. Closes #11126.

^{Written for commit 3e44346. Summary will update on new commits.}

[github-actions]

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[cubic-dev-ai]

No issues found across 2 files

[RomneyDa]

@siewcapital thanks for the link fixes!

Could you update the tests to use imported MODEL_DOCS_URLS or similar to prevent 2 sources of truth? Or feel free to remove the test file in this case.

[siewcapital]

I have read the CLA Document and I hereby sign the CLA

[siewcapital]

@RomneyDa Makes total sense to avoid duplicating the source of truth. I've gone ahead and just dropped the test file entirely as you suggested, which keeps things clean and simple.