feat: 工单列表重设计+权限组实例过滤+通知修复

后端:
- Ticket model 新增 ticket_no 字段(格式: YYYYMMDDHHmmss+ms+seq, 如20260522160543841)
- create_ticket 自动生成工单编号(flush后生成)
- _enrich_ticket 新增 instance_name, current_approver_name 字段
- current_approver: 从 ticket_approvals 查询第一个 pending 状态的审批步骤获取审核人
- TicketResponse schema 新增 ticket_no, instance_name, current_approver_name
- 新增 /instances/accessible endpoint(按用户权限组过滤实例, 无admin bypass)
- instance_group response_model 改为 InstanceGroupDetailResponse(含readonly/write实例)
- instance_group_members 脏数据清理, 重建 group_id=2 正确数据
- notification 模板修复: \n→\n 换行, 钉钉 \n→\n\n 双换行
- test_notification endpoint 改为真正调用 NotificationSender.send()
- auditor 角色添加到 audit_rule/ticket 只读端点
- seed_data() 创建4个默认用户(admin/zhangsan/laoliu/lurenjia)
- SQLite ALTER TABLE 添加 ticket_no 列, 迁移现有6条工单数据

前端:
- TicketsPage 完全重设计: 工单编号/实例名称/提交人/当前审核人/状态/操作
- 状态映射简化: pending/reviewing/approved→审核中, success→完成, failed→失败
- 执行详情弹框: 解析 execute_result JSON 展示状态/影响行数/耗时/验证/原始输出/错误信息
- 状态流程可视化(提交→审批→通过→执行→完成)
- 快速筛选: 全部/待审批/执行中/完成/失败 (合并 pending+reviewing+approved 统计)
- TicketCreatePage: 去掉数据库类型选择器, 用 accessible(write) 过滤变更实例
- QueriesPage: 用 accessible(readonly) 过滤查询实例
- instance.ts 新增 accessible 方法
- 分页优化: 动态计算页码范围(总页>5时中间滚动)

backend/app/api/v1/endpoints/workflow.py

@@ -95,11 +95,13 @@ async def create_workflow(
         )
         db.add(step)
 
-    await db.commit()
-    # Reload with steps
+    await db.flush()
+    wf_id = workflow.id
+    # Reload with steps — use fresh query by id to avoid identity map issues
+    db.expire(workflow)
     result = await db.execute(
         select(WorkflowDefinition)
-        .where(WorkflowDefinition.id == workflow.id)
+        .where(WorkflowDefinition.id == wf_id)
         .options(selectinload(WorkflowDefinition.steps))
     )
     workflow = result.scalar_one()
@@ -146,8 +148,35 @@ async def update_workflow(
     if data.is_active is not None:
         workflow.is_active = data.is_active
 
-    await db.commit()
-    await db.refresh(workflow)
+    # 更新步骤（先删后建）
+    if data.steps is not None:
+        from sqlalchemy import delete as sa_delete
+        await db.execute(
+            sa_delete(WorkflowStep).where(WorkflowStep.workflow_id == workflow_id)
+        )
+        await db.flush()
+        for step_data in data.steps:
+            step = WorkflowStep(
+                workflow_id=workflow.id,
+                step_number=step_data.step_number,
+                name=step_data.name,
+                step_type=step_data.step_type,
+                approver_role=step_data.approver_role,
+                approver_ids=step_data.approver_ids,
+                is_required=step_data.is_required,
+                timeout_hours=step_data.timeout_hours,
+                auto_approve_on_timeout=step_data.auto_approve_on_timeout,
+            )
+            db.add(step)
+        await db.flush()
+    # Reload with steps
+    db.expire(workflow)
+    result = await db.execute(
+        select(WorkflowDefinition)
+        .where(WorkflowDefinition.id == workflow_id)
+        .options(selectinload(WorkflowDefinition.steps))
+    )
+    workflow = result.scalar_one()
     return _serialize_workflow(workflow)