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

frontend/src/pages/TicketsPage.tsx

@@ -15,6 +15,13 @@ import { ticketApi } from '@/api/ticket';
 /* ------------------------------------------------------------------ */
 /*  Types                                                              */
 /* ------------------------------------------------------------------ */
+interface PendingStep {
+  step_number: number;
+  step_name: string;
+  step_type: string;
+  approver_names: string[];
+}
+
 interface TicketItem {
   id: number;
   ticket_no: string | null;
@@ -31,6 +38,7 @@ interface TicketItem {
   approver_id: number | null;
   approver_name: string | null;
   current_approver_name: string | null;
+  pending_steps: PendingStep[];
   reason: string | null;
   audit_result: string | null;
   execute_result: string | null;
@@ -285,7 +293,7 @@ export default function TicketsPage() {
                     <th className="text-left px-4 py-3 font-semibold">工单编号</th>
                     <th className="text-left px-4 py-3 font-semibold">实例名称</th>
                     <th className="text-left px-4 py-3 font-semibold">提交人</th>
-                    <th className="text-left px-4 py-3 font-semibold">当前审核人</th>
+                    <th className="text-left px-4 py-3 font-semibold">待处理</th>
                     <th className="text-left px-4 py-3 font-semibold">状态</th>
                     <th className="text-left px-4 py-3 font-semibold">
                       <button onClick={() => setSortAsc(!sortAsc)} className="flex items-center gap-1 hover:text-blue-400 transition-colors">
@@ -310,7 +318,7 @@ export default function TicketsPage() {
                     <th className="text-left px-4 py-3 font-semibold">工单编号</th>
                     <th className="text-left px-4 py-3 font-semibold">实例名称</th>
                     <th className="text-left px-4 py-3 font-semibold">提交人</th>
-                    <th className="text-left px-4 py-3 font-semibold">当前审核人</th>
+                    <th className="text-left px-4 py-3 font-semibold">待处理</th>
                     <th className="text-left px-4 py-3 font-semibold">状态</th>
                     <th className="text-left px-4 py-3 font-semibold">
                       <button onClick={() => setSortAsc(!sortAsc)} className="flex items-center gap-1 hover:text-blue-400 transition-colors">
@@ -352,11 +360,22 @@ export default function TicketsPage() {
                         </div>
                       </td>
 
-                      {/* 当前审核人 */}
+                      {/* 待处理 */}
                       <td className="px-4 py-3.5">
-                        <span className="text-sm text-[var(--dg-text-secondary)]">
-                          {ticket.current_approver_name || (ticket.status === 'approved' ? '待执行' : '-')}
-                        </span>
+                        {ticket.pending_steps?.length > 0 ? (
+                          <div className="flex flex-col gap-1">
+                            {ticket.pending_steps.map((ps) => (
+                              <div key={ps.step_number} className="flex items-center gap-1.5 text-xs">
+                                <span className="text-[var(--dg-text-muted)] shrink-0">{ps.step_name}:</span>
+                                <span className="text-[var(--dg-text-primary)] font-medium">{ps.approver_names.join(', ')}</span>
+                              </div>
+                            ))}
+                          </div>
+                        ) : (
+                          <span className="text-sm text-[var(--dg-text-muted)]">
+                            {['success', 'failed', 'rejected', 'rollback'].includes(ticket.status) ? '-' : '-'}
+                          </span>
+                        )}
                       </td>
 
                       {/* 状态 */}