Fix compile errors from initial build

- Main.kt: move ConfigStore/AppState outside application {} scope (remember
  is not valid outside a composable)
- IosConnector: split runGphoto2/runGphoto2InDir to avoid named+positional
  vararg mixing (Kotlin does not allow this)
- ConnectScreen: fix SmartPhone -> Smartphone icon name
- ConnectScreen/BrowseScreen/ImportScreen/SettingsScreen: update deprecated
  Icons.Default.ArrowBack to Icons.AutoMirrored.Filled.ArrowBack
- AndroidConnector: remove unused variable assignment in remoteChecksum
- ExifFilter: replace return@filter labels with private helper function to
  eliminate ambiguous label warnings

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists