fix: lint errors in widget-renderer.tsx and layout.tsx

Start by running pnpm lint and inspect apps/app/src/components/generative-ui/widget-renderer.tsx at the two reported effects and the unused description prop, then review layout.tsx at the Google Fonts link. Done means the Plus Jakarta Sans load uses next/font, the effect lint errors and unused prop warning are resolved, and pnpm lint passes without errors or warnings.

Description

The pnpm lint CI check is failing with 2 errors and 2 warnings.

Errors

1. react-hooks/set-state-in-effect in widget-renderer.tsx:414

// apps/app/src/components/generative-ui/widget-renderer.tsx
useEffect(() => {
  if (!active) return;
  setIndex(0);  // ← setState called synchronously in effect
  const interval = setInterval(() => {
    setIndex((i) => (i + 1) % LOADING_PHRASES.length);
  }, 1800);
  return () => clearInterval(interval);
}, [active]);

Fix: Reset the index outside the effect (e.g. derive from active changing, or use a ref).

2. react-hooks/set-state-in-effect in widget-renderer.tsx:457

useEffect(() => {
  if (!html || !iframeRef.current) return;
  if (html === committedHtmlRef.current) return;
  committedHtmlRef.current = html;
  iframeRef.current.srcdoc = assembleDocument(html);
  setLoaded(false);  // ← setState called synchronously in effect
  setHeight(0);
}, [html]);

Fix: Restructure so loaded/height are derived from html changes without synchronous setState in the effect body.

Warnings

3. Unused description prop — widget-renderer.tsx:424

export function WidgetRenderer({ title, description, html }: WidgetRendererProps) {
//                                      ^^^^^^^^^^^ defined but never used

Fix: Either use the prop or prefix with underscore (_description).

4. Custom font loaded in layout.tsx instead of next/font — layout.tsx:15

<link
  href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap"
  rel="stylesheet"
/>

Fix: Use next/font/google to load Plus Jakarta Sans for automatic optimization and self-hosting.