Add bulk search link to advanced search

[Shikhar-395]

Closes #9715

Summary

Adds a Bulk Search (beta) link to the advanced search page so the bulk search feature is discoverable without exposing it broadly in the main search UI.

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@RayBB

[mekarpeles]

Thanks for the PR, @Shikhar-395!

🤖 Copilot has been assigned for an initial review.

@RayBB is assigned to this PR and currently has:

• 1 open PR(s) of equal or higher priority to review first

PR triage checklist (maintainers / Pam)

• PR description — not empty; explains what the change does and how to verify it
• References an issue — PR body contains a #NNN reference
  • Linked issue is triaged — has a Priority: * label (not just Needs: Triage)
  • Linked issue is assigned — has at least one assignee
• Commit history clean — no WIP/fixup/conflict noise; commit messages are meaningful
• CI passing — no failing check-runs
• Test cases present — if the change touches substantive logic, test coverage exists or is explained
• Proof of testing — PR body includes a description of what was tested, a screenshot, or a video

Note

This comment was automatically generated by Pam, Open Library's Project AI Manager, on behalf of @mekarpeles. Pam is designed to provide status visibility, perform basic project management functions and relevant codebase research, and provide actionable feedback so contributors aren't left waiting.

[Copilot]

Pull request overview

Adds a discoverability link for the Bulk Search feature by surfacing “Bulk Search (beta)” on the Advanced Search page (per #9715), without adding it to the main search UI.

Changes:

• Add “Bulk Search (beta)” link to the Advanced Search page’s helper links.
• Update i18n message references to include the Advanced Search template as a source for the existing “Bulk Search (beta)” string.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
openlibrary/templates/search/advancedsearch.html	Adds a /search/bulk link labeled “Bulk Search (beta)” alongside existing search helper links.
openlibrary/i18n/messages.pot	Updates source references for the existing “Bulk Search (beta)” msgid to include search/advancedsearch.html.