fix(highlight): auto-detect language for code blocks without explicit lang

fix(publisher): render math server-side via KaTeX

feat(editor): Iframe embed component for remote URLs

fix(publisher): footer credit links to the editor Space

feat(publisher): editor pill shows who you're signed in as

feat(publisher): editor quick-link for signed-in editors

feat(agent): switch AI backend from OpenRouter to HF Inference Providers

feat(publisher): generate llms.txt Markdown twin for LLM agents

fix(publisher): render HF user card via dedicated transformer

fix(ui,publisher): kill theme/color flickers and translation prompts

refactor(backend/publisher): transformer pipeline + shared registry + shiki highlighting

refactor(backend): modular server split with new routes, persistence and agent layer

refactor: remove MUI, unify publisher pipeline, add shared component registry

test: add vitest test suite for publisher, auth, security, utils