diff --git a/packages/shared/__tests__/utils.test.ts b/packages/shared/__tests__/utils.test.ts
new file mode 100644
index 0000000000..7682270add
--- /dev/null
+++ b/packages/shared/__tests__/utils.test.ts
@@ -0,0 +1,138 @@
+import { describe, expect, it } from 'vitest'
+
+import { isBase64ImageDataUrl, isDataUrl, parseDataUrl } from '../utils'
+
+describe('parseDataUrl', () => {
+  it('parses a standard base64 image data URL', () => {
+    const result = parseDataUrl('data:image/png;base64,iVBORw0KGgo=')
+    expect(result).toEqual({
+      mediaType: 'image/png',
+      isBase64: true,
+      data: 'iVBORw0KGgo='
+    })
+  })
+
+  it('parses a base64 data URL with additional parameters', () => {
+    const result = parseDataUrl('data:image/jpeg;name=foo;base64,/9j/4AAQ')
+    expect(result).toEqual({
+      mediaType: 'image/jpeg',
+      isBase64: true,
+      data: '/9j/4AAQ'
+    })
+  })
+
+  it('parses a plain text data URL (non-base64)', () => {
+    const result = parseDataUrl('data:text/plain,Hello%20World')
+    expect(result).toEqual({
+      mediaType: 'text/plain',
+      isBase64: false,
+      data: 'Hello%20World'
+    })
+  })
+
+  it('parses a data URL with empty media type', () => {
+    const result = parseDataUrl('data:;base64,SGVsbG8=')
+    expect(result).toEqual({
+      mediaType: undefined,
+      isBase64: true,
+      data: 'SGVsbG8='
+    })
+  })
+
+  it('returns null for non-data URLs', () => {
+    const result = parseDataUrl('https://example.com/image.png')
+    expect(result).toBeNull()
+  })
+
+  it('returns null for malformed data URL without comma', () => {
+    const result = parseDataUrl('data:image/png;base64')
+    expect(result).toBeNull()
+  })
+
+  it('handles empty string', () => {
+    const result = parseDataUrl('')
+    expect(result).toBeNull()
+  })
+
+  it('handles large base64 data without performance issues', () => {
+    // Simulate a 4K image base64 string (about 1MB)
+    const largeData = 'A'.repeat(1024 * 1024)
+    const dataUrl = `data:image/png;base64,${largeData}`
+
+    const start = performance.now()
+    const result = parseDataUrl(dataUrl)
+    const duration = performance.now() - start
+
+    expect(result).not.toBeNull()
+    expect(result?.mediaType).toBe('image/png')
+    expect(result?.isBase64).toBe(true)
+    expect(result?.data).toBe(largeData)
+    // Should complete in under 10ms (string operations are fast)
+    expect(duration).toBeLessThan(10)
+  })
+
+  it('parses SVG data URL', () => {
+    const result = parseDataUrl('data:image/svg+xml;base64,PHN2Zz4=')
+    expect(result).toEqual({
+      mediaType: 'image/svg+xml',
+      isBase64: true,
+      data: 'PHN2Zz4='
+    })
+  })
+
+  it('parses JSON data URL', () => {
+    const result = parseDataUrl('data:application/json,{"key":"value"}')
+    expect(result).toEqual({
+      mediaType: 'application/json',
+      isBase64: false,
+      data: '{"key":"value"}'
+    })
+  })
+})
+
+describe('isDataUrl', () => {
+  it('returns true for valid data URLs', () => {
+    expect(isDataUrl('data:image/png;base64,ABC')).toBe(true)
+    expect(isDataUrl('data:text/plain,hello')).toBe(true)
+    expect(isDataUrl('data:,simple')).toBe(true)
+  })
+
+  it('returns false for non-data URLs', () => {
+    expect(isDataUrl('https://example.com')).toBe(false)
+    expect(isDataUrl('file:///path/to/file')).toBe(false)
+    expect(isDataUrl('')).toBe(false)
+  })
+
+  it('returns false for malformed data URLs', () => {
+    expect(isDataUrl('data:')).toBe(false)
+    expect(isDataUrl('data:image/png')).toBe(false)
+  })
+})
+
+describe('isBase64ImageDataUrl', () => {
+  it('returns true for base64 image data URLs', () => {
+    expect(isBase64ImageDataUrl('data:image/png;base64,ABC')).toBe(true)
+    expect(isBase64ImageDataUrl('data:image/jpeg;base64,/9j/')).toBe(true)
+    expect(isBase64ImageDataUrl('data:image/gif;base64,R0lG')).toBe(true)
+    expect(isBase64ImageDataUrl('data:image/webp;base64,UklG')).toBe(true)
+  })
+
+  it('returns false for non-base64 image data URLs', () => {
+    expect(isBase64ImageDataUrl('data:image/svg+xml,<svg></svg>')).toBe(false)
+  })
+
+  it('returns false for non-image data URLs', () => {
+    expect(isBase64ImageDataUrl('data:text/plain;base64,SGVsbG8=')).toBe(false)
+    expect(isBase64ImageDataUrl('data:application/json,{}')).toBe(false)
+  })
+
+  it('returns false for regular URLs', () => {
+    expect(isBase64ImageDataUrl('https://example.com/image.png')).toBe(false)
+    expect(isBase64ImageDataUrl('file:///image.png')).toBe(false)
+  })
+
+  it('returns false for malformed data URLs', () => {
+    expect(isBase64ImageDataUrl('data:image/png')).toBe(false)
+    expect(isBase64ImageDataUrl('')).toBe(false)
+  })
+})
diff --git a/packages/shared/utils.ts b/packages/shared/utils.ts
index 7e90624aba..1afd7cbf8b 100644
--- a/packages/shared/utils.ts
+++ b/packages/shared/utils.ts
@@ -88,3 +88,81 @@ const TRAILING_VERSION_REGEX = /\/v\d+(?:alpha|beta)?\/?$/i
 export function withoutTrailingApiVersion(url: string): string {
   return url.replace(TRAILING_VERSION_REGEX, '')
 }
+
+export interface DataUrlParts {
+  /** The media type (e.g., 'image/png', 'text/plain') */
+  mediaType?: string
+  /** Whether the data is base64 encoded */
+  isBase64: boolean
+  /** The data portion (everything after the comma). This is the raw string, not decoded. */
+  data: string
+}
+
+/**
+ * Parses a data URL into its component parts without using regex on the data portion.
+ * This is memory-safe for large data URLs (e.g., 4K images) as it uses indexOf instead of regex.
+ *
+ * Data URL format: data:[<mediatype>][;base64],<data>
+ *
+ * @param url - The data URL string to parse
+ * @returns DataUrlParts if valid, null if invalid
+ *
+ * @example
+ * parseDataUrl('data:image/png;base64,iVBORw0KGgo...')
+ * // { mediaType: 'image/png', isBase64: true, data: 'iVBORw0KGgo...' }
+ *
+ * parseDataUrl('data:text/plain,Hello')
+ * // { mediaType: 'text/plain', isBase64: false, data: 'Hello' }
+ *
+ * parseDataUrl('invalid-url')
+ * // null
+ */
+export function parseDataUrl(url: string): DataUrlParts | null {
+  if (!url.startsWith('data:')) {
+    return null
+  }
+
+  const commaIndex = url.indexOf(',')
+  if (commaIndex === -1) {
+    return null
+  }
+
+  const header = url.slice(5, commaIndex)
+
+  const isBase64 = header.includes(';base64')
+
+  const semicolonIndex = header.indexOf(';')
+  const mediaType = (semicolonIndex === -1 ? header : header.slice(0, semicolonIndex)).trim() || undefined
+
+  const data = url.slice(commaIndex + 1)
+
+  return { mediaType, isBase64, data }
+}
+
+/**
+ * Checks if a string is a data URL.
+ *
+ * @param url - The string to check
+ * @returns true if the string is a valid data URL
+ */
+export function isDataUrl(url: string): boolean {
+  return url.startsWith('data:') && url.includes(',')
+}
+
+/**
+ * Checks if a data URL contains base64-encoded image data.
+ *
+ * @param url - The data URL to check
+ * @returns true if the URL is a base64-encoded image data URL
+ */
+export function isBase64ImageDataUrl(url: string): boolean {
+  if (!url.startsWith('data:image/')) {
+    return false
+  }
+  const commaIndex = url.indexOf(',')
+  if (commaIndex === -1) {
+    return false
+  }
+  const header = url.slice(5, commaIndex)
+  return header.includes(';base64')
+}
diff --git a/src/main/services/FileStorage.ts b/src/main/services/FileStorage.ts
index 2d7520ca67..a82094efcb 100644
--- a/src/main/services/FileStorage.ts
+++ b/src/main/services/FileStorage.ts
@@ -10,6 +10,7 @@ import {
   scanDir
 } from '@main/utils/file'
 import { documentExts, imageExts, KB, MB } from '@shared/config/constant'
+import { parseDataUrl } from '@shared/utils'
 import type { FileMetadata, NotesTreeNode } from '@types'
 import { FileTypes } from '@types'
 import chardet from 'chardet'
@@ -672,8 +673,8 @@ class FileStorage {
         throw new Error('Base64 data is required')
       }
 
-      // 移除 base64 头部信息（如果存在）
-      const base64String = base64Data.replace(/^data:.*;base64,/, '')
+      const parseResult = parseDataUrl(base64Data)
+      const base64String = parseResult?.data ?? base64Data
       const buffer = Buffer.from(base64String, 'base64')
       const uuid = uuidv4()
       const ext = '.png'
@@ -1464,8 +1465,8 @@ class FileStorage {
       })
 
       if (filePath) {
-        const base64Data = data.replace(/^data:image\/png;base64,/, '')
-        fs.writeFileSync(filePath, base64Data, 'base64')
+        const parseResult = parseDataUrl(data)
+        fs.writeFileSync(filePath, parseResult?.data ?? data, 'base64')
       }
     } catch (error) {
       logger.error('[IPC - Error] An error occurred saving the image:', error as Error)
diff --git a/src/renderer/src/aiCore/prepareParams/messageConverter.ts b/src/renderer/src/aiCore/prepareParams/messageConverter.ts
index c3798c1f43..56c5f6a4e7 100644
--- a/src/renderer/src/aiCore/prepareParams/messageConverter.ts
+++ b/src/renderer/src/aiCore/prepareParams/messageConverter.ts
@@ -8,13 +8,13 @@ import { loggerService } from '@logger'
 import { isImageEnhancementModel, isVisionModel } from '@renderer/config/models'
 import type { Message, Model } from '@renderer/types'
 import type { FileMessageBlock, ImageMessageBlock, ThinkingMessageBlock } from '@renderer/types/newMessage'
-import { parseDataUrlMediaType } from '@renderer/utils/image'
 import {
   findFileBlocks,
   findImageBlocks,
   findThinkingBlocks,
   getMainTextContent
 } from '@renderer/utils/messageUtils/find'
+import { parseDataUrl } from '@shared/utils'
 import type {
   AssistantModelMessage,
   FilePart,
@@ -69,18 +69,16 @@ async function convertImageBlockToImagePart(imageBlocks: ImageMessageBlock[]): P
       }
     } else if (imageBlock.url) {
       const url = imageBlock.url
-      const isDataUrl = url.startsWith('data:')
-      if (isDataUrl) {
-        const { mediaType } = parseDataUrlMediaType(url)
-        const commaIndex = url.indexOf(',')
-        if (commaIndex === -1) {
-          logger.error('Malformed data URL detected (missing comma separator), image will be excluded:', {
-            urlPrefix: url.slice(0, 50) + '...'
-          })
-          continue
-        }
-        const base64Data = url.slice(commaIndex + 1)
-        parts.push({ type: 'image', image: base64Data, ...(mediaType ? { mediaType } : {}) })
+      const parseResult = parseDataUrl(url)
+      if (parseResult?.isBase64) {
+        const { mediaType, data } = parseResult
+        parts.push({ type: 'image', image: data, ...(mediaType ? { mediaType } : {}) })
+      } else if (url.startsWith('data:')) {
+        // Malformed data URL or non-base64 data URL
+        logger.error('Malformed or non-base64 data URL detected, image will be excluded:', {
+          urlPrefix: url.slice(0, 50) + '...'
+        })
+        continue
       } else {
         // For remote URLs we keep payload minimal to match existing expectations.
         parts.push({ type: 'image', image: url })
diff --git a/src/renderer/src/components/ImageViewer.tsx b/src/renderer/src/components/ImageViewer.tsx
index 862e992e5b..1a1c9b1fdb 100644
--- a/src/renderer/src/components/ImageViewer.tsx
+++ b/src/renderer/src/components/ImageViewer.tsx
@@ -11,6 +11,7 @@ import {
 import { loggerService } from '@logger'
 import { download } from '@renderer/utils/download'
 import { convertImageToPng } from '@renderer/utils/image'
+import { parseDataUrl } from '@shared/utils'
 import type { ImageProps as AntImageProps } from 'antd'
 import { Dropdown, Image as AntImage, Space } from 'antd'
 import { Base64 } from 'js-base64'
@@ -37,12 +38,13 @@ const ImageViewer: React.FC<ImageViewerProps> = ({ src, style, ...props }) => {
       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])
-        blob = new Blob([byteArray as unknown as BlobPart], { type: mimeType })
+        // 处理 base64 格式的图片 - 使用 parseDataUrl 避免正则匹配大字符串导致OOM
+        const parseResult = parseDataUrl(src)
+        if (!parseResult || !parseResult.mediaType || !parseResult.isBase64) {
+          throw new Error('Invalid base64 image format')
+        }
+        const byteArray = Base64.toUint8Array(parseResult.data)
+        blob = new Blob([byteArray as unknown as BlobPart], { type: parseResult.mediaType })
       } else if (src.startsWith('file://')) {
         // 处理本地文件路径
         const bytes = await window.api.fs.read(src)
diff --git a/src/renderer/src/i18n/locales/en-us.json b/src/renderer/src/i18n/locales/en-us.json
index 41d5933311..7ac425c54a 100644
--- a/src/renderer/src/i18n/locales/en-us.json
+++ b/src/renderer/src/i18n/locales/en-us.json
@@ -1297,6 +1297,7 @@
     "backup": {
       "file_format": "Backup file format error"
     },
+    "base64DataTruncated": "Base64 image data truncated, size",
     "boundary": {
       "default": {
         "devtools": "Open debug panel",
@@ -1377,6 +1378,8 @@
     "text": "Text",
     "toolInput": "Tool Input",
     "toolName": "Tool Name",
+    "truncated": "Data truncated, original size",
+    "truncatedBadge": "Truncated",
     "unknown": "Unknown error",
     "usage": "Usage",
     "user_message_not_found": "Cannot find original user message to resend",
diff --git a/src/renderer/src/i18n/locales/zh-cn.json b/src/renderer/src/i18n/locales/zh-cn.json
index 252758d6e5..e598016fe2 100644
--- a/src/renderer/src/i18n/locales/zh-cn.json
+++ b/src/renderer/src/i18n/locales/zh-cn.json
@@ -1297,6 +1297,7 @@
     "backup": {
       "file_format": "备份文件格式错误"
     },
+    "base64DataTruncated": "Base64 图片数据已截断，大小",
     "boundary": {
       "default": {
         "devtools": "打开调试面板",
@@ -1377,6 +1378,8 @@
     "text": "文本",
     "toolInput": "工具输入",
     "toolName": "工具名",
+    "truncated": "数据已截断，原始大小",
+    "truncatedBadge": "已截断",
     "unknown": "未知错误",
     "usage": "用量",
     "user_message_not_found": "无法找到原始用户消息",
diff --git a/src/renderer/src/i18n/locales/zh-tw.json b/src/renderer/src/i18n/locales/zh-tw.json
index e1bc20d092..ec39a08058 100644
--- a/src/renderer/src/i18n/locales/zh-tw.json
+++ b/src/renderer/src/i18n/locales/zh-tw.json
@@ -1297,6 +1297,7 @@
     "backup": {
       "file_format": "備份檔案格式錯誤"
     },
+    "base64DataTruncated": "Base64 圖片資料已截斷，大小",
     "boundary": {
       "default": {
         "devtools": "開啟除錯面板",
@@ -1377,6 +1378,8 @@
     "text": "文字",
     "toolInput": "工具輸入",
     "toolName": "工具名稱",
+    "truncated": "資料已截斷，原始大小",
+    "truncatedBadge": "已截斷",
     "unknown": "未知錯誤",
     "usage": "用量",
     "user_message_not_found": "無法找到原始使用者訊息",
diff --git a/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx b/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
index 1cb445f12d..a07a69b85a 100644
--- a/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
+++ b/src/renderer/src/pages/home/Messages/Blocks/ErrorBlock.tsx
@@ -33,6 +33,8 @@ import {
 } from '@renderer/types/error'
 import type { ErrorMessageBlock, Message } from '@renderer/types/newMessage'
 import { formatAiSdkError, formatError, safeToString } from '@renderer/utils/error'
+import { formatFileSize } from '@renderer/utils/file'
+import { KB } from '@shared/config/constant'
 import { Alert as AntdAlert, Modal } from 'antd'
 import React, { useEffect, useState } from 'react'
 import { Trans, useTranslation } from 'react-i18next'
@@ -41,6 +43,38 @@ import styled from 'styled-components'
 
 const HTTP_ERROR_CODES = [400, 401, 403, 404, 429, 500, 502, 503, 504]
 
+const MAX_DISPLAY_SIZE = 100 * KB
+
+/**
+ * Truncate large data to prevent OOM when displaying error details.
+ * Uses simple string operations to avoid regex performance issues with large strings.
+ */
+const truncateLargeData = (
+  data: string,
+  t: (key: string) => string
+): { content: string; truncated: boolean; isLikelyBase64: boolean } => {
+  if (!data || data.length <= MAX_DISPLAY_SIZE) {
+    return { content: data, truncated: false, isLikelyBase64: false }
+  }
+
+  const isLikelyBase64 = data.includes('data:image/') && data.includes(';base64,')
+  const formattedSize = formatFileSize(data.length)
+
+  if (isLikelyBase64) {
+    return {
+      content: `[${t('error.base64DataTruncated')} ~${formattedSize}]`,
+      truncated: true,
+      isLikelyBase64: true
+    }
+  }
+
+  return {
+    content: data.slice(0, MAX_DISPLAY_SIZE) + `\n\n... [${t('error.truncated')} ${formattedSize}]`,
+    truncated: true,
+    isLikelyBase64: false
+  }
+}
+
 interface Props {
   block: ErrorMessageBlock
   message: Message
@@ -273,6 +307,16 @@ const Alert = styled(AntdAlert)`
   }
 `
 
+const TruncatedBadge = styled.span`
+  margin-left: 8px;
+  padding: 2px 6px;
+  font-size: 10px;
+  font-weight: normal;
+  color: var(--color-warning);
+  background: var(--color-warning-bg, rgba(250, 173, 20, 0.1));
+  border-radius: 4px;
+`
+
 // 作为 base，渲染公共字段，应当在 ErrorDetailList 中渲染
 const BuiltinError = ({ error }: { error: SerializedError }) => {
   const { t } = useTranslation()
@@ -307,13 +351,32 @@ const AiSdkErrorBase = ({ error }: { error: SerializedAiSdkError }) => {
   const { t } = useTranslation()
   const { highlightCode } = useCodeStyle()
   const [highlightedString, setHighlightedString] = useState('')
+  const [isTruncated, setIsTruncated] = useState(false)
   const cause = error.cause
 
   useEffect(() => {
     const highlight = async () => {
       try {
-        const result = await highlightCode(JSON.stringify(JSON.parse(cause || '{}'), null, 2), 'json')
-        setHighlightedString(result)
+        // Truncate large data before processing to prevent OOM
+        const { content: truncatedCause, truncated, isLikelyBase64 } = truncateLargeData(cause || '', t)
+        setIsTruncated(truncated)
+
+        // Skip JSON parsing and syntax highlighting for base64 data
+        if (isLikelyBase64) {
+          setHighlightedString(truncatedCause)
+          return
+        }
+
+        // Try to parse and format JSON
+        try {
+          const parsed = JSON.parse(truncatedCause || '{}')
+          const formatted = JSON.stringify(parsed, null, 2)
+          const result = await highlightCode(formatted, 'json')
+          setHighlightedString(result)
+        } catch {
+          // If not valid JSON, use as-is
+          setHighlightedString(truncatedCause || '')
+        }
       } catch {
         setHighlightedString(cause || '')
       }
@@ -321,14 +384,16 @@ const AiSdkErrorBase = ({ error }: { error: SerializedAiSdkError }) => {
     const timer = setTimeout(highlight, 0)
 
     return () => clearTimeout(timer)
-  }, [highlightCode, cause])
+  }, [highlightCode, cause, t])
 
   return (
     <>
       <BuiltinError error={error} />
       {cause && (
         <ErrorDetailItem>
-          <ErrorDetailLabel>{t('error.cause')}:</ErrorDetailLabel>
+          <ErrorDetailLabel>
+            {t('error.cause')}:{isTruncated && <TruncatedBadge>{t('error.truncatedBadge')}</TruncatedBadge>}
+          </ErrorDetailLabel>
           <ErrorDetailValue>
             <div
               className="markdown [&_pre]:!bg-transparent [&_pre_span]:whitespace-pre-wrap"
@@ -341,6 +406,29 @@ const AiSdkErrorBase = ({ error }: { error: SerializedAiSdkError }) => {
   )
 }
 
+// Wrapper component to safely display potentially large data in CodeViewer
+const TruncatedCodeViewer: React.FC<{
+  value: string
+  label: string
+  language?: string
+}> = ({ value, label, language = 'json' }) => {
+  const { t } = useTranslation()
+  const { content, truncated, isLikelyBase64 } = truncateLargeData(value, t)
+
+  return (
+    <ErrorDetailItem>
+      <ErrorDetailLabel>
+        {label}:{truncated && <TruncatedBadge>{t('error.truncatedBadge')}</TruncatedBadge>}
+      </ErrorDetailLabel>
+      {isLikelyBase64 ? (
+        <ErrorDetailValue>{content}</ErrorDetailValue>
+      ) : (
+        <CodeViewer value={content} className="source-view" language={language} expanded />
+      )}
+    </ErrorDetailItem>
+  )
+}
+
 const AiSdkError = ({ error }: { error: SerializedAiSdkErrorUnion }) => {
   const { t } = useTranslation()
 
@@ -358,14 +446,7 @@ const AiSdkError = ({ error }: { error: SerializedAiSdkErrorUnion }) => {
       )}
 
       {isSerializedAiSdkAPICallError(error) && (
-        <>
-          {error.responseBody && (
-            <ErrorDetailItem>
-              <ErrorDetailLabel>{t('error.responseBody')}:</ErrorDetailLabel>
-              <CodeViewer value={error.responseBody} className="source-view" language="json" expanded />
-            </ErrorDetailItem>
-          )}
-        </>
+        <>{error.responseBody && <TruncatedCodeViewer value={error.responseBody} label={t('error.responseBody')} />}</>
       )}
 
       {(isSerializedAiSdkAPICallError(error) || isSerializedAiSdkDownloadError(error)) && (
@@ -394,23 +475,10 @@ const AiSdkError = ({ error }: { error: SerializedAiSdkErrorUnion }) => {
           )}
 
           {error.requestBodyValues && (
-            <ErrorDetailItem>
-              <ErrorDetailLabel>{t('error.requestBodyValues')}:</ErrorDetailLabel>
-              <CodeViewer
-                value={safeToString(error.requestBodyValues)}
-                className="source-view"
-                language="json"
-                expanded
-              />
-            </ErrorDetailItem>
+            <TruncatedCodeViewer value={safeToString(error.requestBodyValues)} label={t('error.requestBodyValues')} />
           )}
 
-          {error.data && (
-            <ErrorDetailItem>
-              <ErrorDetailLabel>{t('error.data')}:</ErrorDetailLabel>
-              <CodeViewer value={safeToString(error.data)} className="source-view" language="json" expanded />
-            </ErrorDetailItem>
-          )}
+          {error.data && <TruncatedCodeViewer value={safeToString(error.data)} label={t('error.data')} />}
         </>
       )}
 
diff --git a/src/renderer/src/utils/__tests__/image.test.ts b/src/renderer/src/utils/__tests__/image.test.ts
index 3f35e7c737..0e02957395 100644
--- a/src/renderer/src/utils/__tests__/image.test.ts
+++ b/src/renderer/src/utils/__tests__/image.test.ts
@@ -7,8 +7,7 @@ import {
   captureScrollableAsDataURL,
   compressImage,
   convertToBase64,
-  makeSvgSizeAdaptive,
-  parseDataUrlMediaType
+  makeSvgSizeAdaptive
 } from '../image'
 
 // mock 依赖
@@ -202,36 +201,4 @@ describe('utils/image', () => {
       expect(result.outerHTML).toBe(originalOuterHTML)
     })
   })
-
-  describe('parseDataUrlMediaType', () => {
-    it('extracts media type and base64 flag from standard data url', () => {
-      const r = parseDataUrlMediaType('data:image/png;base64,AAA')
-      expect(r.mediaType).toBe('image/png')
-      expect(r.isBase64).toBe(true)
-    })
-
-    it('handles additional parameters in header', () => {
-      const r = parseDataUrlMediaType('data:image/jpeg;name=foo;base64,AAA')
-      expect(r.mediaType).toBe('image/jpeg')
-      expect(r.isBase64).toBe(true)
-    })
-
-    it('returns undefined media type when missing and detects non-base64', () => {
-      const r = parseDataUrlMediaType('data:text/plain,hello')
-      expect(r.mediaType).toBe('text/plain')
-      expect(r.isBase64).toBe(false)
-    })
-
-    it('handles empty mediatype header', () => {
-      const r = parseDataUrlMediaType('data:;base64,AAA')
-      expect(r.mediaType).toBeUndefined()
-      expect(r.isBase64).toBe(true)
-    })
-
-    it('gracefully handles non data urls', () => {
-      const r = parseDataUrlMediaType('https://example.com/x.png')
-      expect(r.mediaType).toBeUndefined()
-      expect(r.isBase64).toBe(false)
-    })
-  })
 })
diff --git a/src/renderer/src/utils/file.ts b/src/renderer/src/utils/file.ts
index 1d4bf4577c..c1a68ee2eb 100644
--- a/src/renderer/src/utils/file.ts
+++ b/src/renderer/src/utils/file.ts
@@ -1,6 +1,6 @@
 import type { FileMetadata } from '@renderer/types'
 import { FileTypes } from '@renderer/types'
-import { audioExts, documentExts, imageExts, KB, MB, textExts, videoExts } from '@shared/config/constant'
+import { audioExts, documentExts, GB, imageExts, KB, MB, textExts, videoExts } from '@shared/config/constant'
 import mime from 'mime-types'
 
 /**
@@ -46,6 +46,10 @@ export function removeFileExtension(filePath: string): string {
  * @returns {string} 格式化后的文件大小字符串
  */
 export function formatFileSize(size: number): string {
+  if (size >= GB) {
+    return (size / GB).toFixed(1) + ' GB'
+  }
+
   if (size >= MB) {
     return (size / MB).toFixed(1) + ' MB'
   }
diff --git a/src/renderer/src/utils/image.ts b/src/renderer/src/utils/image.ts
index 6f8d8c3d18..3d4824549a 100644
--- a/src/renderer/src/utils/image.ts
+++ b/src/renderer/src/utils/image.ts
@@ -617,23 +617,3 @@ export const convertImageToPng = async (blob: Blob): Promise<Blob> => {
     img.src = url
   })
 }
-
-/**
- * Parse media type from a data URL without using heavy regular expressions.
- *
- * data:[<mediatype>][;base64],<data>
- * - mediatype may be empty (defaults to text/plain;charset=US-ASCII per spec)
- * - we only care about extracting media type and whether it's base64
- */
-export function parseDataUrlMediaType(url: string): { mediaType?: string; isBase64: boolean } {
-  if (!url.startsWith('data:')) return { isBase64: false }
-  const comma = url.indexOf(',')
-  if (comma === -1) return { isBase64: false }
-  // strip leading 'data:' and take header portion only
-  const header = url.slice(5, comma)
-  const semi = header.indexOf(';')
-  const mediaType = (semi === -1 ? header : header.slice(0, semi)).trim() || undefined
-  // base64 flag may appear anywhere after mediatype in the header
-  const isBase64 = header.indexOf(';base64') !== -1
-  return { mediaType, isBase64 }
-}
diff --git a/vitest.config.ts b/vitest.config.ts
index a245f7a416..e91d014b6b 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -56,6 +56,18 @@ export default defineConfig({
             'packages/aiCore/**/__tests__/**/*.{test,spec}.{ts,tsx}'
           ]
         }
+      },
+      // shared 包单元测试配置
+      {
+        extends: true,
+        test: {
+          name: 'shared',
+          environment: 'node',
+          include: [
+            'packages/shared/**/*.{test,spec}.{ts,tsx}',
+            'packages/shared/**/__tests__/**/*.{test,spec}.{ts,tsx}'
+          ]
+        }
       }
     ],
     // 全局共享配置