fix(cover): 修复 OSS 路径双斜杠导致 MediaKit 404 (#1357)

Co-authored-by: xiaoxia <dev@xiaoxiajianji.com>
Co-committed-by: xiaoxia <dev@xiaoxiajianji.com>

apps/api/app/api/routes/templates_editor/cover.py

@@ -137,6 +137,12 @@ def editor_generate_cover(
 
             storage_svc = get_shared_storage_service()
             primary_video_url = storage_svc.get_url(rendered_storage_key)
+        # 防御性规范化：合并路径中的双斜杠（// -> /），但保留协议头的 ://
+        # 历史数据中 project_id 为空时会产生 projects//tasks/ 路径，
+        # MediaKit 的 HTTP 客户端会规范化 URL 导致 404
+        if primary_video_url:
+            import re as _re
+            primary_video_url = _re.sub(r'(?<!:)//', '/', primary_video_url)
         logger.info(
             "获取预览视频URL用于封面生成: plan_id=%s url=%s",
             plan_id,

apps/api/app/api/routes/templates_editor/generation.py

@@ -223,7 +223,12 @@ def _get_task_output_url(task, gen_task_repo, db) -> str:
         use_case = ListGeneratedVideosByTaskUseCase(video_repo)
         videos = use_case.execute(task.id)
         if videos:
-            return getattr(videos[0], "file_url", "") or ""
+            url = getattr(videos[0], "file_url", "") or ""
+            # 规范化：合并路径中的双斜杠（保留协议头 ://）
+            if url:
+                import re as _re
+                url = _re.sub(r"(?<!:)//", "/", url)
+            return url
     except Exception:
         pass
     return ""