chore(mobile): clear the backup detail view when no backup is in progress (#17619)

Clear the backup detail view when no backup is in progress

* When no backup is in progress, display a simple "-" for the details in the upload file info, instead of the data of the last uploaded asset.
* This prevents confusion if a upload job is stuck or just finished.

mobile/lib/widgets/backup/asset_info_table.dart

@@ -19,6 +19,15 @@ class BackupAssetInfoTable extends ConsumerWidget {
       ),
     );
 
+    final isUploadInProgress = ref.watch(
+      backupProvider.select(
+        (value) =>
+            value.backupProgress == BackUpProgressEnum.inProgress ||
+            value.backupProgress == BackUpProgressEnum.inBackground ||
+            value.backupProgress == BackUpProgressEnum.manualInProgress,
+      ),
+    );
+
     final asset = isManualUpload
         ? ref.watch(
             manualUploadProvider.select((value) => value.currentUploadAsset),
@@ -47,7 +56,9 @@ class BackupAssetInfoTable extends ConsumerWidget {
                       fontSize: 10.0,
                     ),
                   ).tr(
-                    args: [asset.fileName, asset.fileType.toLowerCase()],
+                    args: isUploadInProgress
+                        ? [asset.fileName, asset.fileType.toLowerCase()]
+                        : ["-", "-"],
                   ),
                 ),
               ),
@@ -67,7 +78,9 @@ class BackupAssetInfoTable extends ConsumerWidget {
                       fontSize: 10.0,
                     ),
                   ).tr(
-                    args: [_getAssetCreationDate(asset)],
+                    args: [
+                      isUploadInProgress ? _getAssetCreationDate(asset) : "-",
+                    ],
                   ),
                 ),
               ),
@@ -85,7 +98,11 @@ class BackupAssetInfoTable extends ConsumerWidget {
                       fontWeight: FontWeight.bold,
                       fontSize: 10.0,
                     ),
-                  ).tr(args: [asset.id]),
+                  ).tr(
+                    args: [
+                      isUploadInProgress ? asset.id : "-",
+                    ],
+                  ),
                 ),
               ),
             ],