feat: 工单权限过滤+仪表盘优化+LDAP登录+审批流程+待处理工单

后端:
- ticket_statistics/list_tickets 按用户身份过滤(admin全部, dba/auditor审批相关, developer自己的)
- 新增 /dashboard/my-tickets 接口(按角色返回待处理工单)
- auth.py 本地优先+LDAP fallback 登录认证
- ldap_config.py LDAPS 证书验证修复
- instance_detail.py developer/auditor 权限修复

前端:
- Dashboard 仪表盘: 3核心大数字指标+公告+我的待处理工单
- 删除 ECharts 趋势图(无真实数据)
- TicketDetailPage 审批流程时间线展示
- TicketsPage 工单统计按用户过滤+关联列(我提交的/待我审批)
- types 新增 TicketApproval 等类型定义

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

@@ -68,7 +68,7 @@ async def _mysql_execute(instance: Instance, sql: str, database: Optional[str] =
 async def list_databases(
     instance_id: int,
     db: AsyncSession = Depends(get_db),
-    current_user: User = Depends(require_role("admin", "dba")),
+    current_user: User = Depends(require_role("admin", "dba", "developer", "auditor")),
 ):
     instance = await _get_decrypted_instance(db, instance_id)
     # P0: 权限检查
@@ -93,7 +93,7 @@ async def list_tables(
     instance_id: int,
     database: str = Query(..., description="数据库名"),
     db: AsyncSession = Depends(get_db),
-    current_user: User = Depends(require_role("admin", "dba")),
+    current_user: User = Depends(require_role("admin", "dba", "developer", "auditor")),
 ):
     instance = await _get_decrypted_instance(db, instance_id)
     # P0: 权限检查
@@ -160,7 +160,7 @@ async def table_detail(
     database: str = Query(..., description="数据库名"),
     table: str = Query(..., description="表名"),
     db: AsyncSession = Depends(get_db),
-    current_user: User = Depends(require_role("admin", "dba")),
+    current_user: User = Depends(require_role("admin", "dba", "developer", "auditor")),
 ):
     instance = await _get_decrypted_instance(db, instance_id)
     # P0: 权限检查