feat: Support saving files with string or Uint8Array content in saveFile API

Author: experdot

src/main/index.ts

@@ -223,7 +223,12 @@ app.whenReady().then(() => {
         return { success: false, cancelled: true }
       }
 
-      await writeFile(result.filePath!, content, 'utf8')
+      // Handle both string and Uint8Array/Buffer content
+      if (typeof content === 'string') {
+        await writeFile(result.filePath!, content, 'utf8')
+      } else {
+        await writeFile(result.filePath!, Buffer.from(content))
+      }
       return { success: true, filePath: result.filePath }
     } catch (error) {
       console.error('Save file error:', error)

src/preload/index.d.ts

@@ -13,7 +13,7 @@ declare global {
         removeStreamListener: (requestId: string) => void
       }
       saveFile: (options: {
-        content: string
+        content: string | Uint8Array
         defaultPath: string
         filters?: Array<{ name: string; extensions: string[] }>
       }) => Promise<{ success: boolean; cancelled?: boolean; filePath?: string; error?: string }>

src/preload/index.ts

@@ -38,7 +38,7 @@ const api = {
   },
   // 文件操作API
   saveFile: (options: {
-    content: string
+    content: string | Uint8Array
     defaultPath: string
     filters?: Array<{ name: string; extensions: string[] }>
   }) => ipcRenderer.invoke('save-file', options),