feat(approve): 审批详情支持删除审批

- ApproveController 新增 process__delById 代理，转发至审批插件 process/delById；
  服务端注入 is_admin（仅发起人或管理员可删）
- 审批详情页新增「删除」按钮（仅已结束的审批可见），删除后独立路由返回上一页、
  嵌入模式刷新列表

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Http/Controllers/Api/ApproveController.php

@@ -348,6 +348,37 @@ class ApproveController extends AbstractController
         return Base::retSuccess('已撤回', Base::arrayKeyToUnderline($task['data']));
     }
 
+    /**
+     * @api {post} api/approve/process/delById 删除审批（流程实例）
+     *
+     * @apiDescription 需要token身份；仅可删除已结束的审批，且仅发起人或管理员可删
+     * @apiVersion 1.0.0
+     * @apiGroup approve
+     * @apiName process__delById
+     *
+     * @apiQuery {Number} proc_inst_id          流程实例ID
+     *
+     * @apiSuccess {Number} ret     返回状态码（1正确、0错误）
+     * @apiSuccess {String} msg     返回信息（错误描述）
+     * @apiSuccess {Object} data    返回数据
+     */
+    public function process__delById()
+    {
+        $user = User::auth();
+        $data['userid'] = (string)$user->userid;
+        $data['proc_inst_id'] = intval(Request::input('proc_inst_id'));
+        $data['is_admin'] = $user->isAdmin();
+        if ($data['proc_inst_id'] <= 0) {
+            return Base::retError('参数错误');
+        }
+        $ret = Ihttp::ihttp_post($this->flow_url . '/api/v1/workflow/process/delById', json_encode(Base::arrayKeyToCamel($data)));
+        $task = json_decode($ret['ret'] == 1 ? $ret['data'] : '{}', true);
+        if (!$task || $task['status'] != 200) {
+            return Base::retError($task['message'] ?? '删除失败');
+        }
+        return Base::retSuccess('已删除');
+    }
+
     /**
      * @api {post} api/approve/process/findTask 查询需要我审批的流程（审批中）
      *

resources/assets/js/pages/manage/approve/details.vue

@@ -181,6 +181,7 @@
             <Button type="primary" v-if="isShowAgreeBtn && !loadIng" @click="approve(1)">{{$L('同意')}}</Button>
             <Button type="error" v-if="isShowAgreeBtn && !loadIng"  @click="approve(2)">{{$L('拒绝')}}</Button>
             <Button type="warning" v-if="isShowWarningBtn && !loadIng" @click="revocation">{{$L('撤销')}}</Button>
+            <Button type="error" v-if="isShowDeleteBtn && !loadIng" @click="remove">{{$L('删除')}}</Button>
             <Button type="primary" @click="comment" :loading="loadIng > 0" ghost>+{{$L('添加评论')}}</Button>
         </div>
 
@@ -259,7 +260,7 @@ export default {
         },
     },
     computed: {
-        ...mapState(['formOptions']),
+        ...mapState(['formOptions', 'userIsAdmin']),
 
         isShowAgreeBtn() {
             return (this.datas.candidate || '').split(',').indexOf(this.userId + '') != -1 && !this.datas.is_finished
@@ -273,6 +274,11 @@ export default {
             })
             return is;
         },
+        // 仅已结束的审批（已通过2/已拒绝3/已撤回4）可删，且仅发起人或管理员
+        isShowDeleteBtn() {
+            return (this.userId == this.datas.start_user_id || this.userIsAdmin)
+                && [2, 3, 4].includes(Number(this.datas.state));
+        },
     },
     mounted() {
         this.init()
@@ -415,6 +421,36 @@ export default {
                 },
             });
         },
+        // 删除审批
+        remove() {
+            $A.modalConfirm({
+                content: "删除后不可恢复，确定要删除该审批吗？",
+                loading: true,
+                okType: "error",
+                onOk: () => {
+                    return new Promise((resolve, reject) => {
+                        this.$store.dispatch("call", {
+                            url: 'approve/process/delById',
+                            method: 'post',
+                            data: {
+                                proc_inst_id: this.datas.id,
+                            }
+                        }).then(({msg}) => {
+                            $A.messageSuccess(msg);
+                            resolve();
+                            // 删除后记录已不存在：独立路由返回上一页，嵌入模式通知父级刷新列表
+                            if (this.routeName == 'manage-approve-details' || this.routeName == 'manage-messenger') {
+                                this.$router.back()
+                            } else {
+                                this.$emit('revocation')
+                            }
+                        }).catch(({msg}) => {
+                            reject(msg);
+                        });
+                    })
+                },
+            });
+        },
         // 评论
         comment() {
             this.commentData.content = ""