refactor(app): 공통 Header 컴포넌트 적용 및 SafeAreaView edges 수정

- Header.tsx 공통 컴포넌트 생성
- HomeScreen, MembersScreen, AlbumScreen에 공통 Header 적용
- SafeAreaView edges=[] 설정으로 중복 safe area 영역 제거

app/src/components/common/Header.tsx

@@ -0,0 +1,46 @@
+import React from 'react';
+import { View, Text, StyleSheet } from 'react-native';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { colors } from '../../constants/colors';
+
+interface HeaderProps {
+  // 페이지 제목 (없으면 "fromis_9" 표시)
+  title?: string;
+}
+
+// 모바일 웹 MobileHeader와 동일한 공통 헤더 컴포넌트
+export default function Header({ title }: HeaderProps) {
+  const insets = useSafeAreaInsets();
+  
+  return (
+    <View style={[styles.header, { paddingTop: insets.top }]}>
+      <View style={styles.headerContent}>
+        <Text style={styles.headerTitle}>
+          {title || 'fromis_9'}
+        </Text>
+      </View>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  header: {
+    backgroundColor: '#FFFFFF',
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.05,
+    shadowRadius: 2,
+    elevation: 2,
+  },
+  headerContent: {
+    height: 56,
+    alignItems: 'center',
+    justifyContent: 'center',
+    paddingHorizontal: 16,
+  },
+  headerTitle: {
+    fontSize: 20,
+    fontWeight: '700',
+    color: colors.primary,
+  },
+});

app/src/screens/AlbumScreen.tsx

@@ -15,6 +15,7 @@ import type { NativeStackNavigationProp } from '@react-navigation/native-stack';
 
 import { getAlbums, Album } from '../api/albums';
 import { colors } from '../constants/colors';
+import Header from '../components/common/Header';
 import type { AlbumStackParamList } from '../navigation/AppNavigator';
 
 type NavigationProp = NativeStackNavigationProp<AlbumStackParamList>;
@@ -48,7 +49,8 @@ export default function AlbumScreen() {
 
   if (loading) {
     return (
-      <SafeAreaView style={styles.container}>
+      <SafeAreaView style={styles.container} edges={[]}>
+        <Header title="앨범" />
         <View style={styles.loadingContainer}>
           <ActivityIndicator size="large" color={colors.primary} />
         </View>
@@ -57,11 +59,9 @@ export default function AlbumScreen() {
   }
 
   return (
-    <SafeAreaView style={styles.container} edges={['top']}>
-      {/* 헤더 */}
-      <View style={styles.header}>
-        <Text style={styles.headerTitle}>앨범</Text>
-      </View>
+    <SafeAreaView style={styles.container} edges={[]}>
+      {/* 공통 헤더 */}
+      <Header title="앨범" />
 
       {/* 앨범 목록 */}
       <ScrollView
@@ -113,23 +113,6 @@ const styles = StyleSheet.create({
     justifyContent: 'center',
     alignItems: 'center',
   },
-  header: {
-    backgroundColor: '#FFFFFF',
-    paddingVertical: 14,
-    alignItems: 'center',
-    borderBottomWidth: 1,
-    borderBottomColor: '#F3F4F6',
-    shadowColor: '#000',
-    shadowOffset: { width: 0, height: 1 },
-    shadowOpacity: 0.05,
-    shadowRadius: 2,
-    elevation: 2,
-  },
-  headerTitle: {
-    fontSize: 18,
-    fontWeight: 'bold',
-    color: colors.textPrimary,
-  },
   scrollView: {
     flex: 1,
   },

app/src/screens/HomeScreen.tsx

@@ -19,6 +19,7 @@ import { getAlbums, Album } from '../api/albums';
 import { getMembers, Member } from '../api/members';
 import { getUpcomingSchedules, Schedule } from '../api/schedules';
 import { colors } from '../constants/colors';
+import Header from '../components/common/Header';
 import type { AlbumStackParamList } from '../navigation/AppNavigator';
 
 type NavigationProp = NativeStackNavigationProp<AlbumStackParamList>;
@@ -106,10 +107,8 @@ export default function HomeScreen() {
 
   if (loading) {
     return (
-      <SafeAreaView style={styles.container} edges={['top']}>
-        <View style={styles.header}>
-          <Text style={styles.headerTitle}>fromis_9</Text>
-        </View>
+      <SafeAreaView style={styles.container} edges={[]}>
+        <Header />
         <View style={styles.loadingContainer}>
           <ActivityIndicator size="large" color={colors.primary} />
         </View>
@@ -118,11 +117,9 @@ export default function HomeScreen() {
   }
 
   return (
-    <SafeAreaView style={styles.container} edges={['top']}>
-      {/* 상단 헤더 */}
-      <View style={styles.header}>
-        <Text style={styles.headerTitle}>fromis_9</Text>
-      </View>
+    <SafeAreaView style={styles.container} edges={[]}>
+      {/* 공통 헤더 */}
+      <Header />
 
       <ScrollView
         style={styles.scrollView}

app/src/screens/MembersScreen.tsx

@@ -24,6 +24,7 @@ import dayjs from 'dayjs';
 
 import { getMembers, Member } from '../api/members';
 import { colors } from '../constants/colors';
+import Header from '../components/common/Header';
 
 const SCREEN_WIDTH = Dimensions.get('window').width;
 const CARD_WIDTH = (SCREEN_WIDTH - 32 - 24) / 3;
@@ -216,10 +217,8 @@ export default function MembersScreen() {
 
   if (loading) {
     return (
-      <SafeAreaView style={styles.container} edges={['top']}>
-        <View style={styles.header}>
-          <Text style={styles.headerTitle}>멤버</Text>
-        </View>
+      <SafeAreaView style={styles.container} edges={[]}>
+        <Header title="멤버" />
         <View style={styles.loadingContainer}>
           <ActivityIndicator size="large" color={colors.primary} />
         </View>
@@ -228,11 +227,9 @@ export default function MembersScreen() {
   }
 
   return (
-    <SafeAreaView style={styles.container} edges={['top']}>
-      {/* 상단 헤더 */}
-      <View style={styles.header}>
-        <Text style={styles.headerTitle}>멤버</Text>
-      </View>
+    <SafeAreaView style={styles.container} edges={[]}>
+      {/* 공통 헤더 */}
+      <Header title="멤버" />
 
       {/* 멤버 목록 */}
       <ScrollView