fix cudnn path

Make sure the temporary path to cudnn is added correctly.

src/gui.py

@@ -14,12 +14,21 @@
 def set_cuda_paths():
     venv_base = Path(sys.executable).parent
     nvidia_base_path = venv_base / 'Lib' / 'site-packages' / 'nvidia'
+    cudnn_bin_path = nvidia_base_path / 'cudnn' / 'bin'
+
+    # Set CUDA_PATH and CUDA_PATH_V12_2
     for env_var in ['CUDA_PATH', 'CUDA_PATH_V12_2']:
         current_path = os.environ.get(env_var, '')
         os.environ[env_var] = os.pathsep.join(filter(None, [str(nvidia_base_path), current_path]))
+
+    # Add nvidia folder and cudnn bin folder to system PATH
+    current_path = os.environ.get('PATH', '')
+    new_path = os.pathsep.join(filter(None, [str(cudnn_bin_path), str(nvidia_base_path), current_path]))
+    os.environ['PATH'] = new_path
 
 set_cuda_paths()
 
+
 class DocQA_GUI(QWidget):
     def __init__(self):
         super().__init__()