#3212 fix：

1.修复RAGFlow连接异常导致级联删除问题
2.修复RAGFlow获取数量逻辑问题
3.远程失败不再删除本地影子记录，避免产生RAGFlow端孤儿文档
4.优化前端提示语

main/manager-api/src/main/java/xiaozhi/modules/knowledge/rag/impl/RAGFlowAdapter.java

@@ -485,16 +485,11 @@ public class RAGFlowAdapter extends KnowledgeBaseAdapter {
 
     @Override
     public Integer getDocumentCount(String datasetId) {
-        try {
+        DatasetDTO.InfoVO info = getDatasetInfo(datasetId);
-            DatasetDTO.InfoVO info = getDatasetInfo(datasetId);
+        if (info != null && info.getDocumentCount() != null) {
-            if (info != null && info.getDocumentCount() != null) {
+            return info.getDocumentCount().intValue();
-                return info.getDocumentCount().intValue();
-            }
-            return 0;
-        } catch (Exception e) {
-            log.warn("获取文档数量失败: {}", e.getMessage());
-            return 0;
         }
+        return 0;
     }
 
     @Override
@@ -518,7 +513,7 @@ public class RAGFlowAdapter extends KnowledgeBaseAdapter {
             return null;
         } catch (Exception e) {
             log.warn("获取数据集信息失败: datasetId={}, error={}", datasetId, e.getMessage());
-            return null;
+            throw convertToRenException(e);
         }
     }
 

main/manager-api/src/main/java/xiaozhi/modules/knowledge/service/impl/KnowledgeBaseServiceImpl.java

@@ -100,9 +100,9 @@ public class KnowledgeBaseServiceImpl extends BaseServiceImpl<KnowledgeBaseDao,
             }
 
             DatasetDTO.InfoVO datasetInfo = adapter.getDatasetInfo(dto.getDatasetId());
-
+            // getDatasetInfo 正常返回 null 表示远端确实不存在；异常时已抛出 RenException 由外层 catch 接管
             if (datasetInfo == null) {
-                // RAGFlow 端已删除 → 本地级联清理
+                // RAGFlow 端已确认删除 → 本地级联清理
                 log.info("数据集 {} 在 RAGFlow 端不存在，执行本地清理", dto.getDatasetId());
                 cleanupLocalDataset(dto.getDatasetId(), dto.getId());
                 // 标记为已删除，让上层从列表中移除

main/manager-api/src/main/java/xiaozhi/modules/knowledge/service/impl/KnowledgeFilesServiceImpl.java

@@ -529,7 +529,8 @@ public class KnowledgeFilesServiceImpl extends BaseServiceImpl<DocumentDao, Docu
             adapter.deleteDocument(datasetId, req);
             log.info("远程批量删除请求成功");
         } catch (Exception e) {
-            log.warn("远程删除请求部分或全部失败: {}", e.getMessage());
+            log.error("远程删除请求失败，中止本地清理以避免数据不一致: {}", e.getMessage());
+            throw new RenException(e.getMessage());
         }
 
         // 4. 原子化清理本地影子记录并同步统计数据

main/manager-web/src/views/KnowledgeBaseItem.vue

@@ -217,9 +217,9 @@ export default {
           } else {
             this.$message.error(res.data?.msg || this.$t('knowledgeFileUpload.deleteFailed'));
           }
-        }, () => {
+        }, (err) => {
           this.$set(this.deleteLoadingMap, doc.id, false);
-          this.$message.error(this.$t('knowledgeFileUpload.deleteFailed'));
+          this.$message.error(err?.data?.msg ||this.$t('knowledgeFileUpload.deleteFailed'));
         });
       }).catch(() => {});
     },