refactor: delete all deploy related files

README.md

@@ -12,13 +12,7 @@ npm run dev
 - **Build:** `npm run build` → output in `dist/`
 - **Preview production build:** `npm run preview`
 
-Node.js **18** or **20** LTS is recommended (`engines` in `package.json`).
-
-## Deploy
-
-- Shell helpers: `scripts/deploy.sh`, `scripts/check-build.sh` (and `.bat` variants on Windows).
-- GitHub Pages: workflow in `.github/workflows/deploy.yml`.
-- Extra platform notes: `scripts/docs/`.
+Node.js **18** or newer is recommended (`engines` in `package.json`).
 
 ## Agent / design notes