fix: resolve copy image failure for JPEG format pictures (#11529)

- Convert all image formats to PNG before writing to clipboard to ensure compatibility
- Refactor handleCopyImage to unify image source handling (Base64, File, URL)
- Add convertImageToPng utility function using canvas API for robust conversion
- Remove fallback logic that attempted to write unsupported JPEG format

src/renderer/src/components/ImageViewer.tsx

@@ -10,6 +10,7 @@ import {
 } from '@ant-design/icons'
 import { loggerService } from '@logger'
 import { download } from '@renderer/utils/download'
+import { convertImageToPng } from '@renderer/utils/image'
 import type { ImageProps as AntImageProps } from 'antd'
 import { Dropdown, Image as AntImage, Space } from 'antd'
 import { Base64 } from 'js-base64'
@@ -33,39 +34,38 @@ const ImageViewer: React.FC<ImageViewerProps> = ({ src, style, ...props }) => {
   // 复制图片到剪贴板
   const handleCopyImage = async (src: string) => {
     try {
+      let blob: Blob
+
       if (src.startsWith('data:')) {
         // 处理 base64 格式的图片
         const match = src.match(/^data:(image\/\w+);base64,(.+)$/)
         if (!match) throw new Error('Invalid base64 image format')
         const mimeType = match[1]
         const byteArray = Base64.toUint8Array(match[2])
-        const blob = new Blob([byteArray], { type: mimeType })
+        blob = new Blob([byteArray], { type: mimeType })
-        await navigator.clipboard.write([new ClipboardItem({ [mimeType]: blob })])
       } else if (src.startsWith('file://')) {
         // 处理本地文件路径
         const bytes = await window.api.fs.read(src)
         const mimeType = mime.getType(src) || 'application/octet-stream'
-        const blob = new Blob([bytes], { type: mimeType })
+        blob = new Blob([bytes], { type: mimeType })
-        await navigator.clipboard.write([
-          new ClipboardItem({
-            [mimeType]: blob
-          })
-        ])
       } else {
         // 处理 URL 格式的图片
         const response = await fetch(src)
-        const blob = await response.blob()
+        blob = await response.blob()
-
-        await navigator.clipboard.write([
-          new ClipboardItem({
-            [blob.type]: blob
-          })
-        ])
       }
 
+      // 统一转换为 PNG 以确保兼容性（剪贴板 API 不支持 JPEG）
+      const pngBlob = await convertImageToPng(blob)
+
+      const item = new ClipboardItem({
+        'image/png': pngBlob
+      })
+      await navigator.clipboard.write([item])
+
       window.toast.success(t('message.copy.success'))
     } catch (error) {
-      logger.error('Failed to copy image:', error as Error)
+      const err = error as Error
+      logger.error(`Failed to copy image: ${err.message}`, { stack: err.stack })
       window.toast.error(t('message.copy.failed'))
     }
   }

src/renderer/src/utils/image.ts

@@ -566,3 +566,54 @@ export const makeSvgSizeAdaptive = (element: Element): Element => {
 
   return element
 }
+
+/**
+ * 将图片 Blob 转换为 PNG 格式的 Blob
+ * @param blob 原始图片 Blob
+ * @returns Promise<Blob> 转换后的 PNG Blob
+ */
+export const convertImageToPng = async (blob: Blob): Promise<Blob> => {
+  if (blob.type === 'image/png') {
+    return blob
+  }
+
+  return new Promise((resolve, reject) => {
+    const img = new Image()
+    const url = URL.createObjectURL(blob)
+
+    img.onload = () => {
+      try {
+        const canvas = document.createElement('canvas')
+        canvas.width = img.width
+        canvas.height = img.height
+        const ctx = canvas.getContext('2d')
+
+        if (!ctx) {
+          URL.revokeObjectURL(url)
+          reject(new Error('Failed to get canvas context'))
+          return
+        }
+
+        ctx.drawImage(img, 0, 0)
+        canvas.toBlob((pngBlob) => {
+          URL.revokeObjectURL(url)
+          if (pngBlob) {
+            resolve(pngBlob)
+          } else {
+            reject(new Error('Failed to convert image to png'))
+          }
+        }, 'image/png')
+      } catch (error) {
+        URL.revokeObjectURL(url)
+        reject(error)
+      }
+    }
+
+    img.onerror = () => {
+      URL.revokeObjectURL(url)
+      reject(new Error('Failed to load image for conversion'))
+    }
+
+    img.src = url
+  })
+}