[BOOK-491] refactor: 원시 타입 State 최적화 적용 (boxing 오버헤드 제거)

 - mutableStateOf<Int>: 제네릭이라 int → Integer 박싱 필요
 - mutableIntStateOf: int를 직접 저장하여 박싱 불필요

Author: easyhooon

feature/record/src/main/kotlin/com/ninecraft/booket/feature/record/ocr/OcrPresenter.kt

@@ -4,6 +4,7 @@ import android.net.Uri
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
@@ -54,6 +55,7 @@ class OcrPresenter(
     @Composable
     override fun present(): OcrUiState {
         val scope = rememberCoroutineScope()
+        var isLoading by rememberRetained { mutableStateOf(false) }
         var currentUi by rememberRetained { mutableStateOf(OcrUi.CAMERA) }
         var isPermissionDialogVisible by rememberRetained { mutableStateOf(false) }
         var selectedImage by rememberRetained { mutableStateOf("") }
@@ -64,11 +66,9 @@ class OcrPresenter(
         var isCameraRecognitionFailedDialogVisible by rememberRetained { mutableStateOf(false) }
         var isGalleryRecognitionFailedDialogVisible by rememberRetained { mutableStateOf(false) }
         var isRecaptureDialogVisible by rememberRetained { mutableStateOf(false) }
-        var isLoading by rememberRetained { mutableStateOf(false) }
+        var cameraFailureCount by rememberRetained { mutableIntStateOf(0) }
         var sideEffect by rememberRetained { mutableStateOf<OcrSideEffect?>(null) }
 
-        var cameraFailureCount by rememberRetained { mutableStateOf(0) }
-
         LaunchedEffect(isTextDetectionFailed) {
             if (isTextDetectionFailed) {
                 delay(2000)