fix(image): tolerate shell-sourced REFERENCE_IMAGES

gpt_image2_generate_multi.py

@@ -71,7 +71,15 @@ def split_reference_values(raw_value: str) -> list[str]:
         return []
 
     if value.startswith("["):
-        parsed = json.loads(value)
+        try:
+            parsed = json.loads(value)
+        except json.JSONDecodeError:
+            inner = value[1:-1].strip()
+            if not inner:
+                return []
+            parts = [part.strip().strip('"').strip("'") for part in inner.split(",")]
+            return [part for part in parts if part]
+
         if not isinstance(parsed, list):
             raise RuntimeError("REFERENCE_IMAGES 必须是 JSON 数组")
         return [str(item).strip() for item in parsed if str(item).strip()]