Comments and prose only, no code change (DECOUPLE-go-base-mentions.md sections B and C, outside
library/ and README.md): stack-demo's page-flow note becomes 'a normal host page', the share-link
and CORS comments say 'the live test host', embeddability.md's Traefik note says 'a self-hosted
reverse proxy' and drops the internal proxy file path, and how-to's hosting option becomes 'a Git
host you run (for example Forgejo)'. stack-demo.vue's @description feeds the generated tree, so the
landing regenerates the tree. Section A (QA widget), library/ and package.json are left to studio.
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