Fix budget total calculation

Ensure budget total calculation aligns with weekly or monthly budget settings.

src/components/BudgetProgressCard.tsx

@@ -47,6 +47,13 @@ const BudgetProgressCard: React.FC<BudgetProgressCardProps> = ({
     return () => clearTimeout(timeoutId);
   }, [budgetData]);
 
+  // 컴포넌트 마운트 시 월간 탭을 기본으로 설정
+  useEffect(() => {
+    if (selectedTab !== 'monthly') {
+      setSelectedTab('monthly');
+    }
+  }, []);
+
   // budgetDataUpdated 이벤트 감지
   useEffect(() => {
     const handleBudgetDataUpdated = () => {
@@ -76,7 +83,7 @@ const BudgetProgressCard: React.FC<BudgetProgressCardProps> = ({
 
   return (
     <div className="neuro-card mb-6 overflow-hidden w-full">
-      <Tabs defaultValue="daily" value={selectedTab} onValueChange={handleTabChange} className="w-full">
+      <Tabs defaultValue="monthly" value={selectedTab} onValueChange={handleTabChange} className="w-full">
         <TabsList className="grid grid-cols-3 mb-4 bg-transparent">
           <TabsTrigger 
             value="daily"