format: Apply Prettier to existing codebase

Formatting-only changes across all component and story files.
No logic or behaviour changes — only whitespace, line breaks, and trailing commas.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main.tsx

@@ -8,7 +8,9 @@ const App = () => (
     <CssBaseline />
     <div style={{ padding: 32 }}>
       <h1>FA Design System</h1>
-      <p>Run <code>npm run storybook</code> to view components.</p>
+      <p>
+        Run <code>npm run storybook</code> to view components.
+      </p>
     </div>
   </ThemeProvider>
 );
@@ -16,5 +18,5 @@ const App = () => (
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>
     <App />
-  </React.StrictMode>
+  </React.StrictMode>,
 );