refactor: 修复知识库和操作指引

app/Services/DocumentSearchService.php

@@ -41,6 +41,10 @@ class DocumentSearchService
                 $searchBuilder->where('uploaded_by', $filters['uploaded_by']);
             }
 
+            if (!empty($filters['knowledge_base_id'])) {
+                $searchBuilder->where('knowledge_base_id', $filters['knowledge_base_id']);
+            }
+
             // 执行搜索并获取结果
             $results = $searchBuilder->get();
 
@@ -103,6 +107,7 @@ class DocumentSearchService
             'markdown_content' => $document->getMarkdownContent(),
             'type' => $document->type,
             'group_id' => $document->group_id,
+            'knowledge_base_id' => $document->knowledge_base_id,
             'uploaded_by' => $document->uploaded_by,
             'created_at' => $document->created_at?->timestamp,
             'updated_at' => $document->updated_at?->timestamp,