fix(FileStorage): update base64File method to return base64 string instead of Buffer

src/main/services/FileStorage.ts

@@ -274,9 +274,10 @@ class FileStorage {
   public base64File = async (
     _: Electron.IpcMainInvokeEvent,
     filePath: string
-  ): Promise<{ data: Buffer; mime: string }> => {
+  ): Promise<{ data: string; mime: string }> => {
+    const fileBuffer = await fs.promises.readFile(filePath)
     return {
-      data: await fs.promises.readFile(filePath),
+      data: fileBuffer.toString('base64'),
       mime: 'application/pdf'
     }
   }

src/preload/index.d.ts

@@ -74,7 +74,7 @@ declare global {
         ) => Promise<string | null>
         saveImage: (name: string, data: string) => void
         base64Image: (fileId: string) => Promise<{ mime: string; base64: string; data: string }>
-        base64File: (filePath: string) => Promise<{ mime: string; data: Buffer }>
+        base64File: (filePath: string) => Promise<{ mime: string; data: string }>
         download: (url: string) => Promise<FileType | null>
         copy: (fileId: string, destPath: string) => Promise<void>
         binaryFile: (fileId: string) => Promise<{ data: Buffer; mime: string }>

src/renderer/src/providers/GeminiProvider.ts

@@ -88,7 +88,7 @@ export default class GeminiProvider extends BaseProvider {
       const { data, mimeType } = await fileToBase64(file.path)
       return {
         inlineData: {
-          data: data.toString('base64'),
+          data: data,
           mimeType
         }
       } as InlineDataPart
@@ -150,7 +150,6 @@ export default class GeminiProvider extends BaseProvider {
     }
 
     for (const file of message.files || []) {
-      console.log('file', file)
       if (file.type === FileTypes.IMAGE) {
         const base64Data = await window.api.file.base64Image(file.id + file.ext)
         parts.push({