fix: 修复自由创作首尾帧上传人脸图不通过问题

core/backend/apps/ai/free_video.py

@@ -165,7 +165,8 @@ def build_content_items(*, team, prompt: str, mode: str, references: list) -> di
         source = str(ref.get("source") or "upload")
         duration = float(ref.get("duration") or 0)
 
-        dedupe_key = url or f"{source}:{ref.get('asset_id') or ref.get('group_id')}"
+        dedupe_base = url or f"{source}:{ref.get('asset_id') or ref.get('group_id')}"
+        dedupe_key = f"{role}:{dedupe_base}" if mode == "keyframe" else dedupe_base
         if dedupe_key in seen_urls:
             continue
         seen_urls.add(dedupe_key)
@@ -197,7 +198,13 @@ def build_content_items(*, team, prompt: str, mode: str, references: list) -> di
                 raise ValueError(f"素材「{label or fa.name}」尚未就绪，请稍后重试")
             resolved_url = f"asset://{_normalize_remote_asset_id(fa.remote_asset_id)}"
             kind = {"Video": "video", "Audio": "audio"}.get(fa.asset_type, "image")
-            asset_type = _push(kind, resolved_url, "reference_video" if kind == "video" else ("reference_audio" if kind == "audio" else "reference_image"), fa.duration or 0.0)
+            if mode == "keyframe":
+                if kind != "image":
+                    raise ValueError("首尾帧模式仅支持图片素材")
+                effective_role = role if role in {"first_frame", "last_frame"} else "first_frame"
+            else:
+                effective_role = "reference_video" if kind == "video" else ("reference_audio" if kind == "audio" else "reference_image")
+            asset_type = _push(kind, resolved_url, effective_role, fa.duration or 0.0)
             if label and label not in label_to_placeholder:
                 label_to_placeholder[label] = _placeholder_for(asset_type)
             continue