**Derived Requirement**
Ensure that when generating section translation suggestions via the API:
* The API does not return a section suggestion if the only remaining untranslated sections of an article are appendix sections.
* Appendix sections are excluded from suggestion results when no other content sections remain.
* If at least one non-appendix section remains untranslated, the API returns a suggestion for a non-appendix section.
====Test Steps
**Preconditions:**
* User is authenticated (if required by the endpoint).
* An article exists where only appendix sections (e.g., References, External links, See also) remain untranslated.
* An article exists where at least one non-appendix section remains untranslated.
* Access to execute API requests (e.g., via browser dev tools, curl, or API console).
**Test Case 1: Ensure API omits suggestion when only appendix sections remain**
1. Identify an article where all main content sections are translated and only appendix sections remain.
2. Call the section suggestion API endpoint for that article with the relevant source and target language parameters.
3. Inspect the JSON response.
4. ✅❓❌⬜ **AC1:** The API response does not include any section suggestion.