* fix(test): stabilize openai compat oversized-body regression
* docs(web): fix stale body limit in CLAUDE.md (1 MB → 10 MB)
CLAUDE.md:200 still documented the pre-#725 body limit of 1 MB, but
server.rs:354 was changed to 10 MB in #725 (image upload support).
Update the documentation to match the actual production value.