Fix indentation error

app.py

@@ -0,0 +1,39 @@
+   import os
+   import gradio as gr
+   from huggingface_hub import snapshot_download
+   import torch
+   from diffusers import FluxPipeline, FluxTransformer2DModel
+
+   # 安装依赖 (在 Space 启动时自动跑)
+   os.system("pip install huggingface-hub transformers diffusers accelerate safetensors torch gradio")
+
+   # 下载 PosterCraft 模型
+   model_dir = "models/postercraft/postercraft_rl"
+   hf_token = os.environ.get("HF_TOKEN")  # 从 Space secret 获取 Token
+   snapshot_download(repo_id="PosterCraft/PosterCraft-v1_RL", local_dir=model_dir, resume_download=True, token=hf_token)
+
+   # 加载模型 (官方方式, 需 Flux.1-dev 权限)
+   pipeline_id = "black-forest-labs/FLUX.1-dev"
+   dtype = torch.bfloat16
+   pipe = FluxPipeline.from_pretrained(pipeline_id, torch_dtype=dtype, token=hf_token) # 添加 token 认证
+   pipe.transformer = FluxTransformer2DModel.from_pretrained(model_dir, torch_dtype=dtype, token=hf_token) # 添加 token 认证
+   pipe.to("cuda" if torch.cuda.is_available() else "cpu")
+
+   # 生成函数
+   def generate_poster(prompt):
+       try:
+           image = pipe(prompt).images[0]
+           return image
+       except Exception as e:
+           return f"Error: {str(e)}"  # 错误处理，便于调试
+
+   # Gradio UI (自定义界面)
+   iface = gr.Interface(
+       fn=generate_poster,
+       inputs=gr.Textbox(label="海报描述", placeholder="例如: WTCC 世界网球洲际对抗赛海报, 现代风格, 蓝色调"),
+       outputs=gr.Image(label="生成海报"),
+       title="PosterCraft 海报生成系统",
+       description="输入海报描述生成高品质海报。基于 PosterCraft-v1_RL 模型。"
+   )
+
+   iface.launch()