feat(enum): 统一结构化枚举值传输与同步

frontend/src/api/ragDocuments.ts

@@ -47,13 +47,21 @@ export interface RagDocumentBatchUploadRequest {
   remark?: string;
 }
 
-export type RagChunkStrategy =
-  | 'FIXED_LENGTH'
-  | 'PARAGRAPH'
-  | 'HEADING'
-  | 'TABLE_ROW'
-  | 'DELIMITER'
-  | 'SEMANTIC';
+/**
+ * RAG 切片策略枚举值。
+ * <p>
+ * 前后端统一传递枚举值，不再传递字符串名称。
+ */
+export const RAG_CHUNK_STRATEGY = {
+  FIXED_LENGTH: 1,
+  PARAGRAPH: 2,
+  HEADING: 3,
+  TABLE_ROW: 4,
+  DELIMITER: 5,
+  SEMANTIC: 6,
+} as const;
+
+export type RagChunkStrategy = (typeof RAG_CHUNK_STRATEGY)[keyof typeof RAG_CHUNK_STRATEGY];
 
 export interface RagDocumentParseRequest {
   documentIds: string[];