Fix Gradio launch and version compatibility

- Remove demo.launch() - HF Spaces handles this automatically
- Use gradio 4.36.0 which is more stable than 4.44.0

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

hf-space/README.md

@@ -4,7 +4,7 @@ emoji: 🔍
 colorFrom: blue
 colorTo: purple
 sdk: gradio
-sdk_version: 4.44.0
+sdk_version: 4.36.0
 python_version: "3.10"
 app_file: app.py
 pinned: false

hf-space/app.py

@@ -159,5 +159,4 @@ with gr.Blocks(title="Visual Search API") as demo:
     """)
 
 
-# HF Spaces handles the launch automatically
-demo.launch()
+# HF Spaces handles the launch automatically - do not call demo.launch()