fix: update IPC handler for base64 file and enhance upload response structure in GeminiService

src/main/ipc.ts

@@ -210,7 +210,6 @@ export function registerIpc(mainWindow: BrowserWindow, app: Electron.App) {
   ipcMain.handle(IpcChannel.File_WriteWithId, fileManager.writeFileWithId)
   ipcMain.handle(IpcChannel.File_SaveImage, fileManager.saveImage)
   ipcMain.handle(IpcChannel.File_Base64Image, fileManager.base64Image)
-  ipcMain.handle('file:base64File', fileManager.base64File)
   ipcMain.handle(IpcChannel.File_Base64File, fileManager.base64File)
   ipcMain.handle(IpcChannel.File_Download, fileManager.downloadFile)
   ipcMain.handle(IpcChannel.File_Copy, fileManager.copyFile)

src/main/services/remotefile/GeminiService.ts

@@ -47,7 +47,10 @@ export class GeminiService extends BaseFileService {
       fileId: uploadResult.name || '',
       displayName: file.origin_name,
       status,
-      originalFile: uploadResult
+      originalFile: {
+        type: 'gemini',
+        file: uploadResult
+      }
     }
 
     // 只缓存成功的文件