fix: 설정 화면 진입 시 크래시 수정

- AppDatabase.kt 누락된 닫는 괄호 추가
- PermissionHelper.canInstallUnknownApps() SecurityException 처리

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

app/src/main/java/com/hotdeal/alarm/data/local/db/AppDatabase.kt

@@ -62,3 +62,4 @@ abstract class AppDatabase : RoomDatabase() {
  }
  }
  }
+}

app/src/main/java/com/hotdeal/alarm/util/PermissionHelper.kt

@@ -46,7 +46,12 @@ object PermissionHelper {
      */
  fun canInstallUnknownApps(context: Context): Boolean {
  return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+ try {
  context.packageManager.canRequestPackageInstalls()
+ } catch (e: SecurityException) {
+ // REQUEST_INSTALL_PACKAGES 권한이 없으면 false 반환
+ false
+ }
  } else {
  true
  }