[CDX-441] Add support for origin_referrer in SABR

[HHHindawy]

Add originReferrer support for SABR requests

Summary

• Add originReferrer to UserParameters for Search, Autocomplete, Browse, Recommendations, and Quizzes modules
• The value is passed as the origin_referrer query parameter in request URLs (matching the existing tracker behavior)

Tests

• Added tests for Search (getSearchResults, getVoiceSearchResults)
• Added tests for Autocomplete (getAutocompleteResults)
• Added tests for Browse (getBrowseResults)
• Added tests for Recommendations (getRecommendations)
• Added tests for Quizzes (getQuizNextQuestion, getQuizResults)

[Copilot]

Pull request overview

Adds originReferrer support across SABR request builders so callers can pass a client page URL through userParameters, which is then sent to the API as the origin_referrer query parameter (matching existing tracker behavior).

Changes:

• Extended UserParameters TypeScript type with originReferrer.
• Added origin_referrer query param support in Search, Autocomplete, Browse, Recommendations, and Quizzes URL builders.
• Added/updated module specs to assert origin_referrer is included in generated request URLs.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/types/index.d.ts	Adds originReferrer to the shared UserParameters type.
src/modules/search.js	Appends origin_referrer to Search and Voice Search requests when provided.
src/modules/autocomplete.js	Appends origin_referrer to Autocomplete requests when provided.
src/modules/browse.js	Appends origin_referrer to Browse requests when provided.
src/modules/recommendations.js	Appends origin_referrer to Recommendations requests when provided.
src/modules/quizzes.js	Appends origin_referrer to Quizzes requests when provided.
spec/src/modules/search.js	Adds assertions for origin_referrer in Search and Voice Search tests.
spec/src/modules/autocomplete.js	Adds assertion for origin_referrer in Autocomplete tests.
spec/src/modules/browse.js	Adds assertion for origin_referrer in Browse tests.
spec/src/modules/recommendations.js	Adds assertion for origin_referrer in Recommendations tests.
spec/src/modules/quizzes.js	Adds assertions for origin_referrer in Quiz next-question and results tests.

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[constructor-claude-bedrock]

Code Review

This PR consistently and correctly adds originReferrer support as a origin_referrer query parameter across all SABR modules (Search, Autocomplete, Browse, Recommendations, Quizzes), following the existing pattern from the tracker module.

Inline comments: 4 discussions added

Overall Assessment: ⚠️ Needs Work

[constructor-claude-bedrock]

Important Issue: The test only verifies the happy path. Following the repo's testing convention (as seen in other parameters like userIp, userId, segments), there should be a companion test verifying that origin_referrer is not present in the URL when originReferrer is omitted from userParameters. This ensures the falsy-guard (if (originReferrer)) works as intended and that the parameter isn't accidentally leaked. The same gap applies to all six new tests across search.js, autocomplete.js, browse.js, recommendations.js, and quizzes.js.

[constructor-claude-bedrock]

Suggestion: The getVoiceSearchResults test uses apiKey: testApiKey directly instead of spreading ...validOptions like the parallel getSearchResults test does. This inconsistency with the rest of the test suite is pre-existing for other voice search tests, but since this is a new test being added it's a good opportunity to align with the pattern used in getSearchResults for consistency.