fixed stale state after logout and replayed or lost share intents

lib/view/pages/files/files_upload_dialog.dart

@@ -53,15 +53,6 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
     }).toList();
   }
 
-  void showHttpErrorCode(int httpErrorCode) {
-    InfoDialog.show(
-      context,
-      'Error code: $httpErrorCode',
-      title: 'Ein Fehler ist aufgetreten',
-      copyable: true,
-    );
-  }
-
   void _resetProgress() {
     _isUploading = false;
     _overallProgressValue = 0.0;
@@ -221,14 +212,17 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
         return;
       }
 
+      if (!mounted) return;
+      // Stay on the dialog: popping here reported the partial result as a
+      // success to onUploadFinished and closed the error dialog right away.
       if (uploadTask.statusCode < 200 || uploadTask.statusCode > 299) {
-        setState(_resetProgress);
-        if (!mounted) return;
-        Navigator.of(context).pop();
-        showHttpErrorCode(uploadTask.statusCode);
-      } else {
-        uploadetFilePaths.add(fullRemotePath);
+        _showUploadError(
+          'Upload fehlgeschlagen für "$fileName" '
+          '(Fehlercode ${uploadTask.statusCode}).',
+        );
+        return;
       }
+      uploadetFilePaths.add(fullRemotePath);
     }
 
     setState(_resetProgress);