fix(task-deeplink): 共享任务对话的 md/产物按对话创建者解析路径,修复切换账号后找不到文件

xdfx/rwfx/3qfx 任务深链对话按 metadata.taskId 全局共享、不区分用户,但生成的
md/artifacts 与上传文件物理存在 users/{user_id}/threads/{thread_id}/ 下,user_id
之前取当前登录账号。导致 A 账号生成的文件,B 账号打开同一共享对话时后端去
users/B/ 找 → 404「找不到」。

新增 deerflow/runtime/thread_paths.py(resolve_path_user_id /
aresolve_path_user_id):带 taskId 的共享对话统一解析到对话创建者
(threads_meta.user_id),个人对话仍走当前登录(行为不变)。在所有线程文件路径关口替换:
写入源 ThreadDataMiddleware、present_files、uploads(manager+middleware+router)、
产物读写(path_utils → artifacts/skills router)、嵌入式 client.get_artifact。
正向结果进程内缓存;无 DB/内存态/无行均安全回退到当前登录。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

offline-backend-20260512/backend/app/gateway/routers/skills.py

@@ -17,7 +17,7 @@ from pydantic import BaseModel, Field
 from sqlalchemy import select
 
 from app.gateway.deps import get_agent_store, get_config, get_skill_store, get_tag_store
-from app.gateway.path_utils import resolve_thread_virtual_path
+from app.gateway.path_utils import aresolve_thread_virtual_path
 from deerflow.agents.lead_agent.prompt import refresh_skills_system_prompt_cache_async
 from deerflow.config.app_config import AppConfig
 from deerflow.config.extensions_config import ExtensionsConfig, SkillDisplayConfig, SkillStateConfig, get_extensions_config, reload_extensions_config
@@ -1058,7 +1058,7 @@ async def install_skill(
         target_category = body.target_category
         if target_category == SkillCategory.PUBLIC and not is_admin:
             raise HTTPException(status_code=403, detail="Only admin users can install skills to the public directory")
-        skill_file_path = resolve_thread_virtual_path(body.thread_id, body.path)
+        skill_file_path = await aresolve_thread_virtual_path(body.thread_id, body.path)
         result = await get_or_new_skill_storage(app_config=config).ainstall_skill_from_archive(skill_file_path, target_category=target_category)
         try:
             from deerflow.skills.usage import mark_uploaded