fix(layout): adjust main content overflow and font stack configuration

- Change main content container overflow from 'auto' to 'hidden' in MainLayout.vue
- Update font stack in theme.css to include additional Chinese fonts and reorder priority
- Remove max-width constraint from profile container in Profile.vue for better responsiveness

frontend/app/web-gold/src/views/user/Profile.vue

@@ -386,7 +386,6 @@ onMounted(async () => {
 <style scoped>
 .profile-container {
   padding: var(--space-6);
-  max-width: 1200px;
   margin: 0 auto;
 }