fix: get_session_project_id产线不匹配不再删除项目指针

根因: _valid只返回空串,调用方无法区分'项目已删'(应清理自愈)和
'跨产线合法上下文'(必须保留)。原实现产线不匹配也删全局/会话指针——
平台页点一次「工作空间」就把用户在投标页的当前项目清掉(复现脚本实锤)。
修复: _valid返回(vpid, reason), gone才清理, cross只视为无项目回退

pipeline_service/workspace.py

@@ -152,13 +152,13 @@ async def get_session_project_id(sor, uid, session_id='', pipeline_id=''):
             return ''
 
     async def _valid(pid):
-        """pid 存在（且产线匹配，若指定）则返回 pid；否则 ''。"""
+        """返回 (vpid, reason)：vpid 有效则返回；否则 '' + 原因（'gone'=项目已删, 'cross'=跨产线）。"""
         pl = await _project_pipeline(pid)
         if pl is None:
-            return ''
+            return '', 'gone'
         if pipeline_id and pl and pl != pipeline_id:
-            return ''
+            return '', 'cross'
-        return pid
+        return pid, ''
 
     if session_id:
         try:
@@ -169,18 +169,21 @@ async def get_session_project_id(sor, uid, session_id='', pipeline_id=''):
             if recs:
                 pid = getattr(recs[0], 'current_project_id', '') or ''
                 if pid:
-                    vpid = await _valid(pid)
+                    vpid, reason = await _valid(pid)
                     if vpid:
                         return vpid
-                    # 悬空引用：清掉死记录，回退全局
+                    if reason == 'gone':
-                    try:
+                        # 悬空引用：项目已删除 → 清掉死记录（自愈），回退全局
-                        await sor.sqlExe(
+                        try:
-                            "DELETE FROM pipeline_session_settings "
+                            await sor.sqlExe(
-                            "WHERE user_id=${u}$ AND session_id=${s}$",
+                                "DELETE FROM pipeline_session_settings "
-                            {"u": uid, "s": session_id})
+                                "WHERE user_id=${u}$ AND session_id=${s}$",
-                        await sor.sqlExe("COMMIT", {})
+                                {"u": uid, "s": session_id})
-                    except Exception:
+                            await sor.sqlExe("COMMIT", {})
-                        pass
+                        except Exception:
+                            pass
+                    # reason == 'cross'：跨产线的合法上下文，不删除（删除会让用户
+                    # 在该产线页面丢失当前项目），只视为本会话无项目继续回退
         except Exception:
             pass
     try:
@@ -189,16 +192,21 @@ async def get_session_project_id(sor, uid, session_id='', pipeline_id=''):
             {"u": uid})
         pid = getattr(recs[0], 'current_project_id', '') if recs else ''
         if pid:
-            vpid = await _valid(pid)
+            vpid, reason = await _valid(pid)
             if vpid:
                 return vpid
-            try:
+            if reason == 'gone':
-                await sor.sqlExe(
+                # 悬空引用：项目已删除 → 清全局指针（自愈）
-                    "UPDATE pipeline_agent_settings SET current_project_id='' "
+                try:
-                    "WHERE user_id=${u}$", {"u": uid})
+                    await sor.sqlExe(
-                await sor.sqlExe("COMMIT", {})
+                        "UPDATE pipeline_agent_settings SET current_project_id='' "
-            except Exception:
+                        "WHERE user_id=${u}$", {"u": uid})
-                pass
+                    await sor.sqlExe("COMMIT", {})
+                except Exception:
+                    pass
+            # reason == 'cross'：全局项目属于另一产线的合法上下文，不删除
+            # （2026-09-02 修复：原实现产线不匹配也删全局指针，平台页点一次
+            # 「工作空间」就把用户在投标页的当前项目清掉）
         return ''
     except Exception:
         return ''