[Specstreamai]

Summary

The warning at the top of the Google PSE page says new projects get a 403, but not that existing projects stop working too. Google's Custom Search JSON API overview says "Existing Custom Search JSON API customers have until January 1, 2027 to transition to an alternative solution." This adds that sentence with the link to the same warning block, says the google_pse engine sends its searches to this API (https://www.googleapis.com/customsearch/v1 in backend/open_webui/retrieval/web/google_pse.py), and points to the Web Search page to choose another engine. It names no provider.

Related issue or discussion

#1035, where a warning block for the Google PSE change was welcomed in January (it became #1036, which only covered new projects). The same date is behind open-webui/open-webui#34105.

Checklist

• I have reviewed the relevant documentation and matched the existing style.
• This PR meets Open WebUI's contribution standards: it is accurate, relevant to users, narrowly scoped, maintainable, and not promotional content, advertising, lead generation, SEO placement, or a request to list a product, service, provider, integration, gateway, tool, or company primarily for visibility.
• I understand that PRs that do not meet these standards may be closed without review and will not be merged. Repeated, low-quality, off-topic, promotional, or intentionally misleading submissions may result in the contributor being blocked from future participation in Open WebUI repositories.

Notes for reviewers

One file, two added lines. npm run build passes, and so do npm run lint, npm run test:docs-search and prettier --check on the changed page. I run a search API and opened open-webui/open-webui#34105 about the same date.