fix: use file extension in QFileDialog filter to prevent space corruption

desktop-client/main.py

@@ -149,8 +149,10 @@ class VlcSyncApp(QMainWindow):
         
         QMessageBox.information(self, "File Required", f"To join this room, you need to select:\n\nName: {req_name}\nSize: {req_size / (1024*1024):.1f} MB")
         
+        ext = os.path.splitext(req_name)[1].lower()
+        file_filter = f"Video Files (*{ext});;All Files (*)" if ext else "All Files (*)"
         file_path, _ = QFileDialog.getOpenFileName(
-            self, f"Select {req_name}", "", f"Required File ({req_name})"
+            self, f"Select {req_name}", "", file_filter
         )
         
         if file_path: