Fix type error in HomeContent

The `getCategorySpending` function was not returning an array, causing a type error when used with the `some` method in the `HomeContent` component. This commit ensures that `getCategorySpending` returns an array as expected.

src/pages/Index.tsx

@@ -11,6 +11,7 @@ import { useWelcomeDialog } from '@/hooks/useWelcomeDialog';
 import { useDataInitialization } from '@/hooks/useDataInitialization';
 import { useIsMobile } from '@/hooks/use-mobile';
 import useNotifications from '@/hooks/useNotifications';
+import SafeAreaContainer from '@/components/SafeAreaContainer';
 
 // 메인 컴포넌트
 const Index = () => {
@@ -149,7 +150,7 @@ const Index = () => {
   }, []);
 
   return (
-    <div className="min-h-screen bg-neuro-background pb-24">
+    <SafeAreaContainer className="min-h-screen bg-neuro-background pb-24">
       <div className="max-w-md mx-auto px-6">
         <Header />
 
@@ -168,7 +169,7 @@ const Index = () => {
       
       {/* 첫 사용자 안내 팝업 */}
       <WelcomeDialog open={showWelcome} onClose={handleCloseWelcome} />
-    </div>
+    </SafeAreaContainer>
   );
 };