refactor: 清理 parser worker rag merger 的历史类型问题

electron/main/worker/import/incrementalImport.ts

@@ -227,6 +227,9 @@ export async function incrementalImport(
         if (processedCount % BATCH_SIZE === 0) {
           sendProgress(requestId, {
             stage: 'saving',
+            bytesRead: 0,
+            totalBytes: 0,
+            messagesProcessed: processedCount,
             percentage: 50, // 实际进度难以计算，使用固定值
             message: `已处理 ${processedCount} 条，新增 ${newMessageCount} 条`,
           })
@@ -244,6 +247,9 @@ export async function incrementalImport(
 
     sendProgress(requestId, {
       stage: 'done',
+      bytesRead: 0,
+      totalBytes: 0,
+      messagesProcessed: processedCount,
       percentage: 100,
       message: `导入完成，新增 ${newMessageCount} 条消息`,
     })

electron/main/worker/import/streamImport.ts

@@ -17,6 +17,7 @@ import {
   type ParsedMessage,
   type FormatFeature,
 } from '../../parser'
+import { ChatType } from '../../../../src/types/base'
 import { getDbDir } from '../core'
 import {
   initPerfLog,
@@ -876,7 +877,7 @@ export async function streamParseFileInfo(filePath: string, requestId: string):
     VALUES (?, ?, ?, ?, ?, ?)
   `)
 
-  let meta: ParsedMeta = { name: '未知群聊', platform: formatFeature.platform, type: 'group' }
+  let meta: ParsedMeta = { name: '未知群聊', platform: formatFeature.platform, type: ChatType.GROUP }
   const memberSet = new Set<string>()
   let messageCount = 0
   let metaInserted = false