fix(ci): serve dist/client on Pages (adapter nests static output)

[ronaldtse]

Summary

• with the Node adapter present, astro emits dist/client (prerendered site) + dist/server (SSR chunks for the /api routes); uploading dist served a 404 at the domain root because index.html lives under client/
• upload dist/client so Pages serves the static site
• client-side API calls already target api.interscript.org; the same-origin /api examples in api-docs are the only loss (Pages is static-only)

Test plan

• build green
• deploy green and https://interscript.org/ serves the v2 home