improved performance and battery usage on older devices

lib/view/pages/files/files_upload_dialog.dart

@@ -191,18 +191,23 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
       }
 
       final HttpClientResponse uploadTask;
+      final fileIndex = _uploadableFiles.indexOf(file);
+      var lastPercent = -1;
       try {
         uploadTask = await webdavClient.putFile(
           File(filePath),
           fileStat,
           PathUri.parse(fullRemotePath),
           onProgress: (progress) {
+            // Called per 64 KB chunk — thousands of times for a video. Only
+            // rebuild when the visible percentage actually moves.
+            final percent = (progress * 100).floor();
+            if (!mounted || percent == lastPercent) return;
+            lastPercent = percent;
             setState(() {
               file._uploadProgress = progress;
               _overallProgressValue =
-                  ((progress + _uploadableFiles.indexOf(file)) /
-                          _uploadableFiles.length)
-                      .toDouble();
+                  ((progress + fileIndex) / _uploadableFiles.length).toDouble();
             });
           },
         );
@@ -246,7 +251,12 @@ class _FilesUploadDialogState extends State<FilesUploadDialog> {
               itemCount: _uploadableFiles.length,
               itemBuilder: (context, index) {
                 final currentFile = _uploadableFiles[index];
-                currentFile.fileNameController.text = currentFile.fileName;
+                // Only sync when it differs: assigning text resets selection
+                // and notifies the field on every (progress) rebuild.
+                if (currentFile.fileNameController.text !=
+                    currentFile.fileName) {
+                  currentFile.fileNameController.text = currentFile.fileName;
+                }
                 return ListTile(
                   title: TextField(
                     readOnly: _isUploading,