Fix export dialog to close instead of auto-sharing when clicked outside

- Change default close action from 0 (share) to -1 (no action)
- This prevents the dialog from automatically sharing when users click outside
- Users must now explicitly choose Share or Save to Device to proceed
- Improves user experience by preventing accidental sharing

app/src/main/java/com/futo/platformplayer/activities/PolycentricBackupActivity.kt

@@ -285,7 +285,7 @@ class PolycentricBackupActivity : AppCompatActivity() {
                 getString(R.string.export_profile),
                 getString(R.string.choose_export_option),
                 null,
-                0,
+                -1,
                 UIDialogs.Action(getString(R.string.share), {
                     // Share the file
                     val shareIntent = Intent(Intent.ACTION_SEND).apply {