chore: migrate demo.mp4 to Git LFS

docs: update README with badges, personaxis explanation, MIT license

fix: PERSONA.md is purely qualitative, remove live state sections

fix: remove quantitative values from qualitative PERSONA.md output

fix: replace 'identity' with accurate description in UI intro

fix: add TEXT_THINKING_MODE default in start.sh

fix: add defaults for all env vars in start.sh

fix: wait for llama-server before starting uvicorn, handle connection error in UI

fix: shorten hf space short_description to meet 60 char limit

docs: update readme, add hf space tags, remove codex agent references

chore: remove checklist files, track persona runtime artifacts

chore: initial commit