fix: 修复 ApprovalService 使用 form_data.approvers

问题：ApprovalService 还在使用 approval_node.approvers 字段
解决：改用 form_data.approvers 作为运行时审批人数据

修改内容：
1. approve() - 添加跳过 notify 节点逻辑
2. isNodeCompleted() - 从 form_data 获取审批人
3. getPendingOrderIds() - 从 form_data 获取审批人

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

backend/app/service/ApprovalService.php

@@ -93,11 +93,20 @@ class ApprovalService
                 $nextNodes = $this->getNextNodes($order->flow, $currentNode->order);
 
                 if (empty($nextNodes)) {
-                    // 审批完成
+                    // 没有下一节点，审批完成
                     $order->status = ApprovalOrder::STATUS_APPROVED;
                     $order->current_nodes = [];
                 } else {
-                    $order->current_nodes = collect($nextNodes)->pluck('id')->toArray();
+                    // 检查第一个下一节点
+                    $firstNextNode = $nextNodes[0] ?? null;
+                    if ($firstNextNode && $firstNextNode['type'] === 'notify') {
+                        // 下一个是抄送节点，跳过并完成流程
+                        $order->status = ApprovalOrder::STATUS_APPROVED;
+                        $order->current_nodes = [];
+                    } else {
+                        // 下一个是审批节点，移动到该节点
+                        $order->current_nodes = collect($nextNodes)->pluck('id')->toArray();
+                    }
                 }
 
                 $order->save();
@@ -294,11 +303,21 @@ class ApprovalService
             ->where('action', 'approve')
             ->get();
 
-        $approvers = $node->approvers ?? [];
+        // 从 form_data 获取审批人列表
+        $order = ApprovalOrder::find($orderId);
+        $formData = $order->form_data ?? [];
+        $approvers = $formData['approvers'] ?? [];
+
+        // 兼容两种格式：[{id:1, name:'...'}] 或 [1]
+        if (!empty($approvers) && is_array($approvers[0] ?? null) && isset($approvers[0]['id'])) {
+            $approverIds = array_column($approvers, 'id');
+        } else {
+            $approverIds = $approvers;
+        }
 
         if ($node->type === ApprovalNode::TYPE_AND_APPROVE) {
             // 会签：需要所有人通过
-            return count($records) >= count($approvers);
+            return count($records) >= count($approverIds);
         } elseif ($node->type === ApprovalNode::TYPE_OR_APPROVE) {
             // 或签：任一人通过即可
             return count($records) >= 1;
@@ -332,21 +351,29 @@ class ApprovalService
 
         $result = [];
         foreach ($pendingOrders as $order) {
-            $currentNodeIds = $order->current_nodes ?? [];
+            // 从 form_data 获取审批人列表
-            $nodes = ApprovalNode::whereIn('id', $currentNodeIds)->get();
+            $formData = $order->form_data ?? [];
+            $approvers = $formData['approvers'] ?? [];
 
-            foreach ($nodes as $node) {
+            // 兼容两种格式：[{id:1, name:'...'}] 或 [1]
-                $approvers = $node->approvers ?? [];
+            if (!empty($approvers)) {
-                if (in_array($userId, $approvers)) {
+                if (is_array($approvers[0] ?? null) && isset($approvers[0]['id'])) {
+                    // 对象数组格式: [{id:1, name:'...'}]
+                    $approverIds = array_column($approvers, 'id');
+                } else {
+                    // ID数组格式: [1, 2, 3]
+                    $approverIds = $approvers;
+                }
+
+                if (in_array($userId, $approverIds)) {
                     // 检查是否已审批
                     $hasApproved = ApprovalRecord::where('order_id', $order->id)
-                        ->where('node_id', $node->id)
                         ->where('approver_id', $userId)
+                        ->whereIn('action', [ApprovalRecord::ACTION_APPROVE, ApprovalRecord::ACTION_REJECT])
                         ->exists();
 
                     if (!$hasApproved) {
                         $result[] = $order->id;
-                        break;
                     }
                 }
             }