Needs chat_backend#75 for the waitlist and usage API, and the server-infra crawler-file change so those root files are not the SPA shell.
The account and document numbers in the screenshots come from a local mock of the usage API, not production.
Screenshots
Landing, registration off
Landing, mobile
Landing, registration on
Pricing
Privacy
Changelog
Sign in unchanged
Test plan
react-scripts test — 234 passed
Incognito / shows the landing page, not Sign In
Signed-in / still opens chat
/account/ still redirects to /signin/ when logged out
Waitlist POST and usage GET against the new API
/robots.txt, /sitemap.xml, and /llms.txt return plain text, not HTML
## Summary
- Logged-out `/` is a public landing page. Signed-in `/` still opens chat.
- Adds `/pricing/`, `/privacy/`, and `/changelog/`, plus header and footer links.
- Primary path is **Create account** when registration is on, and an email **waitlist** when it is off.
- Titles, canonicals, Organization and Product JSON-LD, `sitemap.xml`, `robots.txt`, and `llms.txt`.
- Usage counts render only from `GET /api/public/usage/`. No avatars. No founder block. No testimonials.
- Closes #113, #114, #115, and #116.
Needs [chat_backend#75](https://git.aimloperations.com/ai_ml_operations/chat_backend/pulls) for the waitlist and usage API, and the server-infra crawler-file change so those root files are not the SPA shell.
The account and document numbers in the screenshots come from a local mock of the usage API, not production.
## Screenshots
### Landing, registration off

### Landing, mobile

### Landing, registration on

### Pricing

### Privacy

### Changelog

### Sign in unchanged

## Test plan
- [x] `react-scripts test` — 234 passed
- [ ] Incognito `/` shows the landing page, not Sign In
- [ ] Signed-in `/` still opens chat
- [ ] `/account/` still redirects to `/signin/` when logged out
- [ ] Waitlist POST and usage GET against the new API
- [ ] `/robots.txt`, `/sitemap.xml`, and `/llms.txt` return plain text, not HTML
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Summary
/is a public landing page. Signed-in/still opens chat./pricing/,/privacy/, and/changelog/, plus header and footer links.sitemap.xml,robots.txt, andllms.txt.GET /api/public/usage/. No avatars. No founder block. No testimonials.Needs chat_backend#75 for the waitlist and usage API, and the server-infra crawler-file change so those root files are not the SPA shell.
The account and document numbers in the screenshots come from a local mock of the usage API, not production.
Screenshots
Landing, registration off
Landing, mobile
Landing, registration on
Pricing
Privacy
Changelog
Sign in unchanged
Test plan
react-scripts test— 234 passed/shows the landing page, not Sign In/still opens chat/account/still redirects to/signin/when logged out/robots.txt,/sitemap.xml, and/llms.txtreturn plain text, not HTML