feat(folio): add web favicon (black bg, white dot)

examples/folio/app/webApp/src/wasmJsMain/resources/index.html

@@ -4,6 +4,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
     <title>Folio</title>
+    <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><rect width='64' height='64' fill='black'/><circle cx='32' cy='32' r='14' fill='white'/></svg>">
     <style>
         html, body { margin: 0; padding: 0; height: 100%; background: #000; color: #fff; font-family: system-ui, sans-serif; }
         #app { height: 100%; }