fix: prevent horizontal overflow on mobile devices

- Add overflow-x: hidden to html and body elements
- Set max-width: 100vw to constrain content to viewport width
- Fixes responsive layout issues on mobile screens

Closes #6

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

apps/web/src/app/globals.css

@@ -163,6 +163,12 @@
     @apply border-border;
   }
 
+  html,
+  body {
+    overflow-x: hidden;
+    max-width: 100vw;
+  }
+
   body {
     @apply bg-background text-foreground;
     font-family: var(--font-sans);