fix: downgrade gradio to 4.38.0 (4.44 has bool iteration bug)

Dockerfile

@@ -11,7 +11,7 @@ RUN apt-get update && apt-get install -y libgl1 libglib2.0-0 && rm -rf /var/lib/
 RUN pip install torch torchvision --index-url https://download.pytorch.org/whl/cpu
 
 # Install rest (compatible modern versions)
-RUN pip install "diffusers>=0.30.0,<0.31" transformers==4.40.0 accelerate==0.29.0 gradio==4.44.0 Pillow==10.2.0 safetensors==0.4.2 "huggingface_hub>=0.22" sentencepiece protobuf
+RUN pip install "diffusers>=0.30.0,<0.31" transformers==4.40.0 accelerate==0.29.0 gradio==4.38.0 Pillow==10.2.0 safetensors==0.4.2 "huggingface_hub>=0.22" sentencepiece protobuf
 
 COPY . /app