fix(web): sync generated course data

web/README.md

@@ -1,36 +1,40 @@
-This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+# Course Web App
 
-## Getting Started
+This Next.js app renders the root-level `s01_*` through `s20_*` course
+chapters. The app does not treat `web/src/data/generated/*.json` or
+`web/public/course-assets/` as source of truth; those files are generated from
+the repository root.
 
-First, run the development server:
+## Local Development
 
 ```bash
+npm ci
 npm run dev
-# or
-yarn dev
-# or
-pnpm dev
-# or
-bun dev
 ```
 
-Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+`npm run dev` runs `npm run extract` first, so edits to root chapter README
+files, `code.py` files, or chapter SVG assets are copied into the web app
+before the dev server starts.
 
-You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+## Updating Generated Course Data
 
-This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+After changing any root-level chapter content, run:
 
-## Learn More
-
-To learn more about Next.js, take a look at the following resources:
+```bash
+npm run extract
+```
 
-- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
-- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+Commit the resulting updates under:
 
-You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+- `web/src/data/generated/`
+- `web/public/course-assets/`
 
-## Deploy on Vercel
+This keeps the web course aligned with the canonical root chapters and prevents
+the site from showing stale code signatures, line counts, documentation text, or
+chapter diagrams.
 
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+## Production Build
 
-Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.
+```bash
+npm run build
+```