Remove decorative icons and update CORS configuration

src/styles/index.css

@@ -1,3 +1,23 @@
 @tailwind base;
 @tailwind components;
-@tailwind utilities;
+@tailwind utilities;
+
+/* Prevent white flash on admin pages */
+@layer base {
+  html {
+    background-color: rgb(249 250 251);
+  }
+  
+  html.dark {
+    background-color: rgb(17 24 39);
+  }
+  
+  body {
+    @apply bg-gray-50 dark:bg-gray-900 transition-none;
+  }
+  
+  /* Disable transitions on page load to prevent flash */
+  .no-transitions * {
+    transition: none !important;
+  }
+}