Make export behavior more consistent with pre-3.0

Author: farmerbb

app/src/main/java/com/farmerbb/notepad/android/NotepadActivity.kt

@@ -62,9 +62,9 @@ class NotepadActivity: ComponentActivity(), FSAFActivityCallbacks {
     }
 
     override fun fsafStartActivityForResult(intent: Intent, requestCode: Int) {
-        if (intent.action == Intent.ACTION_OPEN_DOCUMENT) {
-            // Override type to plaintext only
-            intent.type = "text/plain"
+        when(intent.action) {
+            Intent.ACTION_OPEN_DOCUMENT -> intent.type = "text/plain"
+            Intent.ACTION_OPEN_DOCUMENT_TREE -> intent.removeExtra(Intent.EXTRA_LOCAL_ONLY)
         }
 
         startActivityForResult(intent, requestCode)

app/src/main/java/com/farmerbb/notepad/viewmodel/NotepadViewModel.kt

@@ -290,6 +290,12 @@ class NotepadViewModel(
             clearSelectedNotes()
         }
 
+        if (hydratedNotes.size == 1) {
+            val note = hydratedNotes.first()
+            exportSingleNote(note.metadata, note.text, filenameFormat)
+            return@launch
+        }
+
         artVandelay.exportNotes(
             hydratedNotes,
             filenameFormat,