fix(agent_menus): 项目解析收敛到 get_session_project_id（含悬空引用防护）

不再手写 session→项目解析（与解析层语义漂移是「会话有项目、入口说没有」的根因之一）

wwwroot/api/agent_menus.dspy

@@ -14,26 +14,15 @@ session_id = (params_kw or {}).get('session_id', '') or ''
 default_pipeline_id = (params_kw or {}).get('pipeline_id', '') or ''
 
 # 1. 解析当前产线：当前会话项目 → sd_projects.pipeline_id
+# 统一走 get_session_project_id（含悬空引用防护：指向已删除项目的记录自愈清理并回退全局）。
+# 禁止在此重复实现 session→项目解析——多份实现语义漂移正是「会话有项目、入口说没有」的根因。
 pipeline_id = ''
 pid = ''
 try:
+    from pipeline_service.workspace import get_session_project_id
     dbname = get_module_dbname('pipeline_core')
     async with DBPools().sqlorContext(dbname) as sor:
-        # 按会话解析项目：session 表优先，回退全局（多 tab 各自项目，互不覆盖）
-        if session_id:
-            try:
-                _srecs = await sor.sqlExe(
-                    "SELECT current_project_id FROM pipeline_session_settings "
-                    "WHERE user_id=${u}$ AND session_id=${s}$",
-                    {"u": uid, "s": session_id})
-                pid = getattr(_srecs[0], 'current_project_id', '') if _srecs else ''
-            except Exception:
-                pid = ''
-        if not pid:
-            recs = await sor.sqlExe(
-                "SELECT current_project_id FROM pipeline_agent_settings WHERE user_id=${u}$",
-                {"u": uid})
-            pid = getattr(recs[0], 'current_project_id', '') if recs else ''
+        pid = await get_session_project_id(sor, uid, session_id) or ''
         if pid:
             precs = await sor.sqlExe(
                 "SELECT pipeline_id FROM sd_projects WHERE id=${p}$", {"p": pid})