[Bug]: Uploaded API landing content (web/apiContent.md) shows a blank landing page

Please select the area the issue is related to

Developer Portal

Please select the aspect the issue is related to

Aspect/UI (Frontend layouts, components, styling)

Description

When I upload a content pack to an API (Edit API → Content → Upload content) that includes a landing page under web/apiContent.md, the API's landing page goes blank instead of showing my content. The default overview disappears, but my uploaded content is not shown either — so the page ends up empty except for the title banner and the Documentation / Try with AI buttons.

Downloadable docs in the docs/ folder work fine (they appear under Documentation), so it's specifically the landing-page content that doesn't display.

Steps to Reproduce

1. Edit an API in the portal and go to the Content step.
2. Upload a ZIP containing web/apiContent.md (some Markdown) and optionally docs/*.md. [1]
3. Click Upload content (it reports success).
4. Open the API's landing page.

[1] api-content-sample.zip

Severity Level of the Issue

Severity/Major (Important functionality is broken. Should be prioritized. Doesn't need immediate attention)

Environment Details (with versions)

MacOS, Chrome

Start by reproducing the upload flow with the linked api-content-sample.zip, checking web/apiContent.md and docs/*.md separately. Compare the rendered API landing page with the Documentation view; done means landing-page Markdown appears while the existing title banner and Documentation / Try with AI buttons remain usable.