fix: remove gradio==6.12.0 pin to resolve SDK conflict with 6.18.0

requirements.txt

@@ -1,5 +1,5 @@
 # NEXUS Visual Weaver - HF Space Dependencies
-# DO NOT pin gradio version - HF Spaces SDK manages it (currently 6.12.0)
+# DO NOT pin gradio version - HF Spaces SDK manages it (currently 6.18.0)
 # Pinning gradio conflicts with the SDK's own gradio install step
 huggingface_hub>=0.30.0
 accelerate>=1.12.0
@@ -9,9 +9,3 @@ git+https://github.com/huggingface/diffusers.git
 peft>=0.13.0
 safetensors
 modal
-torch==2.11.0
-diffusers>=0.30.0
-gradio[oauth,mcp]==6.12.0
-uvicorn>=0.14.0
-websockets>=10.4
-spaces==0.50.4