Fix periodical backup creation interval

app/src/main/kotlin/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -12,6 +12,7 @@ import androidx.appcompat.app.AppCompatDelegate
 import androidx.collection.ArraySet
 import androidx.core.content.edit
 import androidx.core.os.LocaleListCompat
+import androidx.core.util.TimeUtils
 import androidx.documentfile.provider.DocumentFile
 import androidx.preference.PreferenceManager
 import dagger.hilt.android.qualifiers.ApplicationContext
@@ -34,6 +35,7 @@ import org.koitharu.kotatsu.reader.domain.ReaderColorFilter
 import java.io.File
 import java.net.Proxy
 import java.util.EnumSet
+import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -471,7 +473,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 		get() = prefs.getBoolean(KEY_BACKUP_PERIODICAL_ENABLED, false)
 
 	val periodicalBackupFrequency: Long
-		get() = prefs.getString(KEY_BACKUP_PERIODICAL_FREQUENCY, null)?.toLongOrNull() ?: 7L
+		get() = TimeUnit.DAYS.toMillis(prefs.getString(KEY_BACKUP_PERIODICAL_FREQUENCY, null)?.toLongOrNull() ?: 7L)
 
 	val periodicalBackupMaxCount: Int
 		get() = prefs.getInt(KEY_BACKUP_PERIODICAL_COUNT, 10)

app/src/main/kotlin/org/koitharu/kotatsu/settings/backup/PeriodicalBackupSettingsFragment.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
+import android.text.format.DateUtils
 import android.view.View
 import androidx.activity.result.ActivityResultCallback
 import androidx.activity.result.contract.ActivityResultContracts
@@ -22,7 +23,6 @@ import org.koitharu.kotatsu.core.util.ext.resolveFile
 import org.koitharu.kotatsu.core.util.ext.tryLaunch
 import org.koitharu.kotatsu.core.util.ext.viewLifecycleScope
 import java.io.File
-import java.text.SimpleDateFormat
 import javax.inject.Inject
 
 @AndroidEntryPoint
@@ -60,6 +60,7 @@ class PeriodicalBackupSettingsFragment : BasePreferenceFragment(R.string.periodi
 			context?.contentResolver?.takePersistableUriPermission(result, takeFlags)
 			settings.periodicalBackupDirectory = result
 			bindOutputSummary()
+			bindLastBackupInfo()
 		}
 	}
 
@@ -82,8 +83,10 @@ class PeriodicalBackupSettingsFragment : BasePreferenceFragment(R.string.periodi
 				backupStorage.getLastBackupDate()
 			}
 			preference.summary = lastDate?.let {
-				val formatter = SimpleDateFormat.getDateInstance(SimpleDateFormat.LONG)
-				preference.context.getString(R.string.last_successful_backup, formatter.format(it))
+				preference.context.getString(
+					R.string.last_successful_backup,
+					DateUtils.getRelativeTimeSpanString(it.time),
+				)
 			}
 			preference.isVisible = lastDate != null
 		}