Pass HF_TOKEN to FluxPipeline for gated model access on HF Spaces

Reads HF_TOKEN (or HUGGING_FACE_HUB_TOKEN) env var and passes it to
from_pretrained(). Without this the Space gets a 401 on the gated
FLUX.1-schnell repo. Also logs whether the token is set.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

image_generator.py

@@ -98,10 +98,12 @@ def get_pipeline():
 
     from diffusers import FluxPipeline
 
-    print("Loading FLUX.1-schnell pipeline…")
+    hf_token = os.environ.get("HF_TOKEN") or os.environ.get("HUGGING_FACE_HUB_TOKEN")
+    print(f"Loading FLUX.1-schnell pipeline… (token={'set' if hf_token else 'NOT SET'})")
     _pipe = FluxPipeline.from_pretrained(
         "black-forest-labs/FLUX.1-schnell",
         torch_dtype=torch.bfloat16,
+        token=hf_token,
     )
 
     if torch.cuda.is_available():