Switch to Gradio 5 stack and modern hub

requirements.txt

@@ -1,6 +1,7 @@
-gradio>=4.0.0
+gradio==5.17.1
+gradio_client==1.7.1
 torch>=2.1.0
 transformers>=4.40.0
 safetensors>=0.4.0
-huggingface_hub==0.24.7
+huggingface_hub>=0.28.1
 Pillow>=10.0.0