fix: 优化架构

engine/adapters/image/comfy_adapter.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+from engine.comfy_client import generate_image as comfy_generate_image
+from engine.config import AppConfig
+
+from .base import BaseImageGen
+from .mock_adapter import MockImageGen
+
+
+class ComfyAdapter(BaseImageGen):
+    def __init__(self, cfg: AppConfig):
+        self.cfg = cfg
+        self.fallback = MockImageGen()
+
+    def generate(self, prompt: dict[str, str], output_dir: str | Path) -> str:
+        positive = str(prompt.get("positive", "") or "")
+        negative = str(prompt.get("negative", "") or "")
+        try:
+            return str(
+                comfy_generate_image(
+                    positive,
+                    output_dir,
+                    negative_text=negative or None,
+                    cfg=self.cfg,
+                    timeout_s=60,
+                    retry=2,
+                    filename_prefix="shot",
+                )
+            )
+        except Exception as e:
+            # Let render_pipeline do configured fallback.
+            raise
+