fix: 修复审批详情显示问题

- 修复用户不存在时仍然显示审批人ID的问题
- 即使部分用户不存在，也保留其ID信息显示
- 优化审批人和抄送人的查询逻辑

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/service/ApprovalService.php

@@ -280,20 +280,42 @@ class ApprovalService
 
         // 获取实际审批人的完整用户信息
         $actualApproverUsers = [];
+        $actualApproverIdsArray = [];
         if (!empty($actualApproverIds)) {
-            $actualApproverUsers = User::whereIn('id', $actualApproverIds)
-                ->get()
-                ->keyBy('id')
-                ->toArray();
+            $users = User::whereIn('id', $actualApproverIds)->get()->keyBy('id');
+            foreach ($actualApproverIds as $approverId) {
+                if ($users->has($approverId)) {
+                    $actualApproverUsers[$approverId] = $users->get($approverId)->toArray();
+                } else {
+                    // 用户不存在，至少保留ID信息
+                    $actualApproverUsers[$approverId] = [
+                        'id' => $approverId,
+                        'name' => '用户' . $approverId . '（不存在）',
+                        'status' => 0,
+                    ];
+                }
+                $actualApproverIdsArray[] = (int)$approverId;
+            }
         }
 
         // 获取实际抄送人的完整用户信息
         $actualCcUserObjects = [];
+        $actualCcUserIdsArray = [];
         if (!empty($actualCcUserIds)) {
-            $actualCcUserObjects = User::whereIn('id', $actualCcUserIds)
-                ->get()
-                ->keyBy('id')
-                ->toArray();
+            $users = User::whereIn('id', $actualCcUserIds)->get()->keyBy('id');
+            foreach ($actualCcUserIds as $ccUserId) {
+                if ($users->has($ccUserId)) {
+                    $actualCcUserObjects[$ccUserId] = $users->get($ccUserId)->toArray();
+                } else {
+                    // 用户不存在，至少保留ID信息
+                    $actualCcUserObjects[$ccUserId] = [
+                        'id' => $ccUserId,
+                        'name' => '用户' . $ccUserId . '（不存在）',
+                        'status' => 0,
+                    ];
+                }
+                $actualCcUserIdsArray[] = (int)$ccUserId;
+            }
         }
 
         // 处理节点信息，添加实际审批人
@@ -305,7 +327,7 @@ class ApprovalService
                 // 为审批节点添加实际审批人信息
                 if (in_array($node->type, ['approver', 'and_approve', 'or_approve'])) {
                     $nodeArray['actual_approvers'] = [];
-                    foreach ($actualApproverIds as $approverId) {
+                    foreach ($actualApproverIdsArray as $approverId) {
                         if (isset($actualApproverUsers[$approverId])) {
                             $nodeArray['actual_approvers'][] = $actualApproverUsers[$approverId];
                         }
@@ -313,7 +335,7 @@ class ApprovalService
 
                     // 获取每个实际审批人的审批状态
                     $nodeArray['approver_statuses'] = [];
-                    foreach ($actualApproverIds as $approverId) {
+                    foreach ($actualApproverIdsArray as $approverId) {
                         $record = ApprovalRecord::where('order_id', $orderId)
                             ->where('node_id', $node->id)
                             ->where('approver_id', $approverId)
@@ -334,7 +356,7 @@ class ApprovalService
                 // 为通知节点添加实际抄送人
                 if ($node->type === 'notify') {
                     $nodeArray['actual_cc_users'] = [];
-                    foreach ($actualCcUserIds as $ccUserId) {
+                    foreach ($actualCcUserIdsArray as $ccUserId) {
                         if (isset($actualCcUserObjects[$ccUserId])) {
                             $nodeArray['actual_cc_users'][] = $actualCcUserObjects[$ccUserId];
                         }