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/ticket.py

@@ -38,6 +38,24 @@ import logging
 
 logger = logging.getLogger(__name__)
 
+
+def _generate_ticket_no(ticket_id: int) -> str:
+    """生成工单编号，格式: YYYYMMDDHHmmss + 微秒前3位 + 序号补齐。
+    
+    示例: 20260522160543841
+    
+    Args:
+        ticket_id: 工单自增ID，用作末尾序号
+    
+    Returns:
+        工单编号字符串
+    """
+    now = datetime.now()
+    base = now.strftime("%Y%m%d%H%M%S")
+    ms = f"{now.microsecond:06d}"[:3]  # 取前3位毫秒
+    seq = str(ticket_id).zfill(3)[-3:]  # ID 补齐到3位
+    return f"{base}{ms}{seq}"
+
 if TYPE_CHECKING:
     from app.services.ticket_executor import ExecutionReport
 
@@ -112,17 +130,10 @@ class TicketExecuteConfirm(BaseModel):
 
 
 async def _enrich_ticket(ticket: Ticket, db: AsyncSession) -> Dict[str, Any]:
-    """丰富工单数据，添加申请人/审批人名称等信息。
-
-    Args:
-        ticket: 工单对象
-        db: 数据库会话
-
-    Returns:
-        丰富的工单字典
-    """
+    """丰富工单数据，添加申请人/审批人/实例名称/当前审核人等信息。"""
     data = {
         "id": ticket.id,
+        "ticket_no": ticket.ticket_no,
         "title": ticket.title,
         "db_type": ticket.db_type,
         "instance_id": ticket.instance_id,
@@ -147,12 +158,39 @@ async def _enrich_ticket(ticket: Ticket, db: AsyncSession) -> Dict[str, Any]:
         applicant = r.scalar_one_or_none()
         data["applicant_name"] = applicant.display_name if applicant else "未知"
 
-    # Resolve approver name
+    # Resolve approver name (最终审批人)
     if ticket.approver_id:
         r = await db.execute(select(User).where(User.id == ticket.approver_id))
         approver = r.scalar_one_or_none()
         data["approver_name"] = approver.display_name if approver else "未知"
 
+    # Resolve instance name
+    if ticket.instance_id:
+        r = await db.execute(select(Instance).where(Instance.id == ticket.instance_id))
+        inst = r.scalar_one_or_none()
+        data["instance_name"] = inst.name if inst else "未知"
+
+    # Resolve current approver (审批/执行阶段的当前待审核人)
+    data["current_approver_name"] = None
+    if ticket.status in ("reviewing", "approved", "executing"):
+        pending_approval = await db.execute(
+            select(TicketApproval)
+            .where(
+                TicketApproval.ticket_id == ticket.id,
+                TicketApproval.action == "pending",
+            )
+            .order_by(TicketApproval.step_number)
+            .limit(1)
+        )
+        pending = pending_approval.scalar_one_or_none()
+        if pending:
+            if pending.approver_id:
+                r = await db.execute(select(User).where(User.id == pending.approver_id))
+                approver_user = r.scalar_one_or_none()
+                data["current_approver_name"] = approver_user.display_name if approver_user else None
+            elif pending.approver_role:
+                data["current_approver_name"] = pending.approver_role
+
     return data
 
 
@@ -370,6 +408,10 @@ async def create_ticket(
     db.add(ticket)
     await db.flush()  # flush to get ticket.id
 
+    # 生成工单编号
+    ticket.ticket_no = _generate_ticket_no(ticket.id)
+    await db.flush()
+
     # 7. 创建审批步骤（多级审批流）
     if default_workflow:
         wf_steps_result = await db.execute(