Restructure: move Vite project into app/, deploy build output to repo root

The webserver serves the repo checkout directly as static files, so
index.html at the repo root must be the production build (pointing at
hashed /assets/*.js) rather than the dev template (/src/main.tsx),
which was being served with an unrecognized application/octet-stream
MIME type and blocked by the browser.

- Move src/, public/, scripts/, server/, package.json, vite.config.ts,
  tsconfig.json, .env(.example), and the dev index.html into app/.
- Add app/scripts/deploy.mjs: copies app/dist/* into the repo root
  after every `vite build`, cleaning up stale hashed filenames.
- Wire it into `npm run build` (app/package.json).
- Update run.sh to operate from app/, and .gitignore for the new layout.
- Commit the current build output (index.html, assets/, manifest,
  sw.js, workbox-*.js, favicon.svg, icons/, LICENSE) to the repo root.
- Update README with the new project layout and deployment model.

sw.js

@@ -0,0 +1 @@
+if(!self.define){let e,i={};const n=(n,s)=>(n=new URL(n+".js",s).href,i[n]||new Promise(i=>{if("document"in self){const e=document.createElement("script");e.src=n,e.onload=i,document.head.appendChild(e)}else e=n,importScripts(n),i()}).then(()=>{let e=i[n];if(!e)throw new Error(`Module ${n} didn’t register its module`);return e}));self.define=(s,o)=>{const r=e||("document"in self?document.currentScript.src:"")||location.href;if(i[r])return;let c={};const l=e=>n(e,r),t={module:{uri:r},exports:c,require:l};i[r]=Promise.all(s.map(e=>t[e]||l(e))).then(e=>(o(...e),c))}}define(["./workbox-abeb32eb"],function(e){"use strict";self.skipWaiting(),e.clientsClaim(),e.precacheAndRoute([{url:"index.html",revision:"17d0b1d684770cbbfe6ee21d3f1198ac"},{url:"assets/workbox-window.prod.es5-BqEJf4Xk.js",revision:null},{url:"assets/index-Cbj_LrNG.js",revision:null},{url:"assets/index-CWSassUi.css",revision:null},{url:"favicon.svg",revision:"a3baf2b041a9ed1fcc08d8a3634b535b"},{url:"icons/apple-touch-icon.png",revision:"ed81749f391ac07000b948263124e943"},{url:"icons/icon-192.png",revision:"8b2374bbaec1e3d1db8a07af64a6ef77"},{url:"icons/icon-512.png",revision:"c44a8f2da9095157b9b9aff7ec8e1aeb"},{url:"icons/maskable-512.png",revision:"beb4196443dc6daafcaab4497038613d"},{url:"manifest.webmanifest",revision:"d1afe01b7c52b0c511fd7e5f11079c23"}],{}),e.cleanupOutdatedCaches(),e.registerRoute(new e.NavigationRoute(e.createHandlerBoundToURL("index.html"),{denylist:[/^\/api\//]})),e.registerRoute(({url:e})=>e.pathname.startsWith("/api/"),new e.NetworkOnly,"GET")});