Update requirements.txt

requirements.txt

@@ -8,10 +8,16 @@ transformers>=4.44
 accelerate==0.30.0
 qwen-vl-utils
 
-# Gradio stack (pin both to compatible versions)
+# Gradio stack
 gradio>=5,<6
 gradio-client>=1.5.2,<2
 
+# Server stack (pulled by Gradio, but pin for stability)
+fastapi==0.115.*
+starlette==0.40.*
+uvicorn>=0.30,<1
+httptools>=0.6      # optional; Uvicorn will prefer this over h11
+
 # PyTorch (leave unpinned here; see notes below)
 torch
 torchvision