fix(frontend) : fix z-index overlay hiding drawers and add pathPrefix config

Lower the white overlay div from z-50 to z-30 so it still masks scrolling
content but no longer covers drawers/modals teleported to body.
Add components pathPrefix: false to resolve auto-imported components
without folder prefix.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/nuxt.config.ts

@@ -31,6 +31,9 @@ export default defineNuxtConfig({
             },
         },
     },
+    components: [
+        {path: '~/components', pathPrefix: false},
+    ],
     vite: {
         server: {
             proxy: {