Fix autocomplete hiding cross-language matches in "Any language" mode

[fvogel]

Summary

• Autocomplete search always passes unique=true to the REST API, which deduplicates results by URI
• When "Any language" is selected, this silently drops matches from other languages (e.g. French results hidden by Spanish ones for the same concept)
• Fix: set unique=false when "Any language" is selected, unique=true otherwise

Steps to reproduce

1. Set up a multilingual vocabulary (e.g. EN/FR/ES)
2. Select "Any language" in the search dropdown
3. Type a term that exists in multiple languages (e.g. restaur matching both Spanish "Restaurar..." and French "Restaurer...")
4. Only results from one language appear; the other language matches are silently dropped

Fix

One-line change in resource/js/vocab-search.js: make unique conditional on whether a specific language is selected.

// Before:
const skosmosSearchUrlParams = new URLSearchParams({ query: this.formatSearchTerm(), unique: true })

// After:
const unique = this.selectedLanguage !== 'all'
const skosmosSearchUrlParams = new URLSearchParams({ query: this.formatSearchTerm(), unique: unique })

Before / After

Before (v3.1): Only Spanish (es) matches — French results silently dropped.

---

After (this fix): Both Spanish and French matches shown, as expected for "Any language" search.

Fixes #1934

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[osma]

Thank you for identifying the issue and proposing a fix.

There is similar functionality for the global search bar and I think it needs to be changed as well:

Skosmos/resource/js/global-search.js

Line 121 in 3ea3d85

const params = new URLSearchParams({ query: apiSearchTerm, unique: true })

To verify that the fix works today and stays working in the future, we would like to have Cypress tests that check for this case. Would it be possible for you to provide such tests? The tests could go into tests/cypress/template/vocab-search-bar.js and tests/cypress/template/global-search-bar.js, respectively.

You probably need a test vocabulary with a suitable test case. One of the test vocabularies is a small subset of YSO that contains the yso:p3358 concept which has the preflabels "systems"@en and "system"@sv, maybe you could use that?