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/travel/TravelRequestApprovalDialog.vue

@@ -3,6 +3,8 @@
     :open="open"
     :badge="badge"
     badge-tone="info"
+    size="approval"
+    actions-align="end"
     :title="title"
     :description="description"
     cancel-text="返回核对"
@@ -105,8 +107,8 @@ function handleRiskConfirmedChange(event) {
 <style scoped>
 .approval-risk-confirm-panel {
   display: grid;
-  gap: 10px;
-  padding: 12px;
+  gap: 8px;
+  padding: 10px;
   border: 1px solid #fed7aa;
   border-radius: 4px;
   background: #fff7ed;
@@ -147,7 +149,7 @@ function handleRiskConfirmedChange(event) {
   grid-template-columns: auto minmax(0, 1fr);
   gap: 9px;
   align-items: flex-start;
-  padding: 8px;
+  padding: 7px 8px;
   border: 1px solid rgba(251, 146, 60, 0.28);
   border-radius: 4px;
   background: #fff;
@@ -207,8 +209,8 @@ function handleRiskConfirmedChange(event) {
 
 .approval-opinion-field {
   display: grid;
-  gap: 8px;
-  margin-top: 14px;
+  gap: 6px;
+  margin-top: 8px;
 }
 
 .approval-opinion-field > span {
@@ -232,15 +234,15 @@ function handleRiskConfirmedChange(event) {
 
 .approval-opinion-field textarea {
   width: 100%;
-  min-height: 96px;
+  min-height: 74px;
   resize: vertical;
-  padding: 12px;
+  padding: 10px 11px;
   border: 1px solid #d7e0ea;
   border-radius: 8px;
   background: #fff;
   color: #0f172a;
   font-size: 13px;
-  line-height: 1.6;
+  line-height: 1.55;
   outline: none;
 }
 
@@ -256,7 +258,7 @@ function handleRiskConfirmedChange(event) {
   gap: 12px;
   color: #64748b;
   font-size: 12px;
-  line-height: 1.5;
+  line-height: 1.45;
 }
 
 .approval-opinion-field small span {