feat: 支持发起人撤回审批

- 在我发起和审批详情中提供申请人撤回操作并恢复资源状态

- 补齐审批说明列表展示、动作权限校验和防重复提交

- 为审批决策增加行锁并补充撤回权限回归测试

easyflow-ui-admin/app/src/views/system/approval/ApprovalDetail.vue

@@ -17,6 +17,7 @@ import {
   ElTag,
 } from 'element-plus';
 
+import { hasPermission } from '#/api/common/hasPermission';
 import { api } from '#/api/request';
 import { $t } from '#/locales';
 import { router } from '#/router';
@@ -41,11 +42,24 @@ const actionLabelMap: Record<string, string> = {
   PUBLISH: $t('approval.action.publish'),
 };
 
+const canApproveAction = computed(
+  () =>
+    !!detail.value?.canApprove &&
+    hasPermission(['/api/v1/approvalInstance/approve']),
+);
+const canRejectAction = computed(
+  () =>
+    !!detail.value?.canReject &&
+    hasPermission(['/api/v1/approvalInstance/reject']),
+);
+const canRevokeAction = computed(
+  () =>
+    !!detail.value?.canRevoke &&
+    hasPermission(['/api/v1/approvalInstance/revoke']),
+);
 const canOperate = computed(() => {
   return (
-    !!detail.value?.canApprove ||
-    !!detail.value?.canReject ||
-    !!detail.value?.canRevoke
+    canApproveAction.value || canRejectAction.value || canRevokeAction.value
   );
 });
 
@@ -258,7 +272,7 @@ function formatEventInfo(row: Record<string, any>) {
 
       <div v-if="canOperate" class="flex items-center gap-3">
         <ElButton
-          v-if="detail?.canApprove"
+          v-if="canApproveAction"
           type="success"
           :disabled="Boolean(approvalActionLoading)"
           :loading="approvalActionLoading === 'approve'"
@@ -267,7 +281,7 @@ function formatEventInfo(row: Record<string, any>) {
           {{ $t('approval.action.approve') }}
         </ElButton>
         <ElButton
-          v-if="detail?.canReject"
+          v-if="canRejectAction"
           type="danger"
           :disabled="Boolean(approvalActionLoading)"
           :loading="approvalActionLoading === 'reject'"
@@ -276,7 +290,7 @@ function formatEventInfo(row: Record<string, any>) {
           {{ $t('approval.action.reject') }}
         </ElButton>
         <ElButton
-          v-if="detail?.canRevoke"
+          v-if="canRevokeAction"
           type="warning"
           :disabled="Boolean(approvalActionLoading)"
           :loading="approvalActionLoading === 'revoke'"