Generate docs/openapi.json (3.1, 362 operations) from the API inventory via
scripts/gen_openapi.py, and serve it with a self-hosted Redoc bundle at
/api/docs - no CDN, works on the air-gapped box. Also serve docs/llms.txt (a
concise LLM entrypoint) at /api/docs/llms.txt. New core 'docs' blueprint;
staticdocs/ excluded from the naming check (vendored minified JS).
The naming/style check now fails a plugin frontend (plugins/<name>/frontend/)
that imports with an escaping ../../ or another plugin's path. Plugin frontends
must reach core only through the @/ alias and otherwise import only their own
tree, so a per-site build can drop a plugin cleanly. All 14 plugin frontends
pass.
