v110-v112 自定义模式完善 + 模板导出增强 + 多模态兼容优化

- 自定义模式：分析模型输出 delta 唯一改动指令，生图模板 custom_image_prompt.md（{delta} 占位符），不再使用负向提示词；generate_design 按 custom_mode 分支，Pinterest 模式保留原创化指令，两模式互不影响
- 多模态分析 response_format 三级回退（json_schema → json_object → none），兼容 DeepSeek
- 模板导出：details 扩展列（细节1/2/3）、target_audience 扩展列（适用人群1）、固定值风格1=休闲/风格2=运动
- 童装特征库更新 + 标题模板外部化 + 图源映射增强

graph/nodes/compose_node.py

@@ -125,7 +125,8 @@ def generate_design(ib, brief: Dict[str, Any], design_dir: Path, out_stem: str,
                     seed: Optional[int] = None,
                     on_400=None,
                     on_503=None,
-                    size: str = "1024x1024") -> Optional[str]:
+                    size: str = "1024x1024",
+                    custom_mode: bool = False) -> Optional[str]:
     """生成单张纯印花设计稿（图2）。返回设计稿路径；失败 / 全局 MD5 重复返回 None。
 
     out_stem: 输出文件名主干（不含扩展名），最终文件 = {out_stem}_design.png。
@@ -146,16 +147,24 @@ def generate_design(ib, brief: Dict[str, Any], design_dir: Path, out_stem: str,
         ref_images = [str(p) for p in (brief.get("ref_images") or []) if str(p)]
         if ref_images and hasattr(ib, "print"):
             try:
-                # 图生图：以爬取图为参考，按分析简报生成原创设计（不复制原图）
-                ref_prompt = img_prompt + (
-                    " Create an ORIGINAL, non-copying flat print design inspired ONLY by "
-                    "the reference image's style and mood. Do NOT reproduce the reference "
-                    "image, its characters, logos, or any text.")
-                out_path = ib.print(
-                    ref_prompt, ref_images[0], out_path,
-                    brief.get("composite_negative", ""),
-                    extra_images=ref_images[1:] or None,
-                    size=size, seed=seed)   # 设计稿尺寸按 config compose.design_size
+                if custom_mode:
+                    # 自定义模式：按 image_prompt 图生图（模板已内置防复制/防服装约束，不追加原创化指令）
+                    out_path = ib.print(
+                        img_prompt, ref_images[0], out_path,
+                        brief.get("composite_negative", ""),
+                        extra_images=ref_images[1:] or None,
+                        size=size, seed=seed)   # 设计稿尺寸按 config compose.design_size
+                else:
+                    # Pinterest 模式：追加原创化指令（防止复制原图，保持原有行为）
+                    ref_prompt = img_prompt + (
+                        " Create an ORIGINAL, non-copying flat print design inspired ONLY by "
+                        "the reference image's style and mood. Do NOT reproduce the reference "
+                        "image, its characters, logos, or any text.")
+                    out_path = ib.print(
+                        ref_prompt, ref_images[0], out_path,
+                        brief.get("composite_negative", ""),
+                        extra_images=ref_images[1:] or None,
+                        size=size, seed=seed)   # 设计稿尺寸按 config compose.design_size
             except Exception as e:  # noqa: BLE001
                 print(f"[compose] 图生图（参考图）失败，回退文生图 {brief.get('topic','')}: {e}")
                 _notify_400(on_400, e)
@@ -255,7 +264,8 @@ def compose_node(state: Dict[str, Any]) -> Dict[str, Any]:
             """单张设计稿生成（并发线程内调用，每设计一线程）。"""
             out_path = generate_design(ib, b, design_dir, f"{country}_{i:02d}",
                                        _safe_errors, seed=_seed,
-                                       size=compose_cfg.get("design_size", "1024x1024"))
+                                       size=compose_cfg.get("design_size", "1024x1024"),
+                                       custom_mode=bool(state.get("custom_mode")))
             if out_path is None:
                 return i, b, None, None
             return i, b, out_path, None