feat(web): 差旅申请详情进度 viewer 与审批/加载态组件增强

- 新增 requestProgressViewer，申请单在直属领导审批视角下将当前步骤展示为'等待批复'，travel-request-detail/app-shell/useRequests 接入
- TravelRequestApprovalDialog 增强审批交互，TableLoadingState 补充表格加载占位，ConfirmDialog 扩展确认对话框能力
- useAppShell/useRequests/AppShellRouteView 配套适配申请详情跳转与会话状态
- 同步更新 requestProgressSteps、travel-request-detail-leader-approval、assistant-session-draft-delete、documents-center-status-filter、app-shell-financial-assistant-entry、request-progress-viewer 等测试

web/src/components/shared/ConfirmDialog.vue

@@ -321,6 +321,60 @@ function handleCancel() {
   max-height: min(420px, calc(100dvh - 292px));
 }
 
+.shared-confirm-card--approval {
+  width: min(460px, calc(100vw - 40px));
+  gap: 10px;
+  padding: 18px 20px;
+  border-color: rgba(var(--theme-primary-rgb, 58, 124, 165), 0.14);
+  border-radius: 6px;
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(248, 250, 252, 0.98));
+  box-shadow:
+    0 18px 40px rgba(15, 23, 42, 0.15),
+    0 1px 0 rgba(255, 255, 255, 0.88) inset;
+}
+
+.shared-confirm-card--approval .shared-confirm-badge {
+  min-height: 24px;
+  padding: 0 9px;
+  font-size: 11px;
+  font-weight: 850;
+}
+
+.shared-confirm-card--approval h4 {
+  font-size: 20px;
+  line-height: 1.38;
+  font-weight: 850;
+}
+
+.shared-confirm-card--approval p {
+  max-width: 34em;
+  color: #64748b;
+  font-size: 13px;
+  line-height: 1.6;
+}
+
+.shared-confirm-card--approval .shared-confirm-body {
+  gap: 8px;
+  max-height: min(270px, calc(100dvh - 238px));
+}
+
+.shared-confirm-card--approval .shared-confirm-actions {
+  gap: 8px;
+  padding-top: 2px;
+}
+
+.shared-confirm-card--approval .shared-confirm-btn {
+  min-width: 118px;
+  min-height: 38px;
+  border-radius: 6px;
+  font-size: 13px;
+}
+
+.shared-confirm-card--approval .shared-confirm-btn.confirm.primary {
+  box-shadow: 0 10px 20px rgba(var(--theme-primary-rgb, 58, 124, 165), 0.18);
+}
+
 .shared-confirm-card--destructive {
   width: min(420px, calc(100vw - 40px));
   gap: 12px;