[style] MainActivity 컴포넌트 색상 수정 및 WindowInsets 비활성화

바텀시트 및 배경 색상 White 로 고정

feature/main/src/main/kotlin/com/unifest/android/feature/main/MainActivity.kt

@@ -3,14 +3,12 @@ package com.unifest.android.feature.main
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
-import androidx.activity.enableEdgeToEdge
 import com.unifest.android.core.designsystem.theme.UnifestTheme
 import dagger.hilt.android.AndroidEntryPoint
 
 @AndroidEntryPoint
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
-        enableEdgeToEdge()
         super.onCreate(savedInstanceState)
         setContent {
             val navigator: MainNavController = rememberMainNavController()

feature/main/src/main/kotlin/com/unifest/android/feature/main/MainScreen.kt

@@ -15,7 +15,6 @@ import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.selection.selectable
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
@@ -107,7 +106,7 @@ internal fun MainScreen(
             )
         },
         snackbarHost = { SnackbarHost(snackBarHostState) },
-        containerColor = MaterialTheme.colorScheme.background,
+        containerColor = Color.White,
     )
 }
 
@@ -119,7 +118,7 @@ private fun MainBottomBar(
     onTabSelected: (MainTab) -> Unit,
 ) {
     if (visible) {
-        Box(modifier = Modifier.background(MaterialTheme.colorScheme.background)) {
+        Box(modifier = Modifier.background(Color.White)) {
             Column {
                 HorizontalDivider(color = Color(0xFFEBEBEB))
                 Row(