feat: 支持点击图片优先打开原图

src/main/image-decrypt-service.ts

@@ -72,24 +72,33 @@ export class ImageDecryptService {
   /**
    * 根据 md5 查找图片文件 (WechatExplorer 风格)
    */
-  findImageFile(md5?: string, imageDatName?: string): string | null {
+  findImageFile(
+    md5?: string,
+    imageDatName?: string,
+    options?: { allowThumbnail?: boolean }
+  ): string | null {
     const accountDir = this.getAccountDir()
     if (!accountDir) return null
+    const allowThumbnail = options?.allowThumbnail !== false
 
     const normalizedMd5 = this.normalizeDatBase(md5 || '')
     const normalizedDatName = this.normalizeDatBase(imageDatName || '')
     console.log('[ImageDecrypt] findImageFile:', {
       md5: normalizedMd5,
       imageDatName: normalizedDatName,
-      accountDir
+      accountDir,
+      allowThumbnail
     })
 
     for (const key of this.uniq([normalizedMd5, normalizedDatName])) {
       const hardlink = this.wcdb4Client?.resolveImageHardlink(key)
       const fullPath = typeof hardlink?.full_path === 'string' ? hardlink.full_path : ''
       if (fullPath && existsSync(fullPath)) {
-        console.log('[ImageDecrypt] hardlink hit:', fullPath)
+        const selected = this.getPreferredDatVariantPath(fullPath, allowThumbnail)
-        return this.getPreferredDatVariantPath(fullPath, true)
+        if (allowThumbnail || !this.isThumbnailName(basename(selected))) {
+          console.log('[ImageDecrypt] hardlink hit:', selected)
+          return selected
+        }
       }
     }
 
@@ -104,18 +113,22 @@ export class ImageDecryptService {
     if (searchKeys.length === 0) return null
 
     for (const key of searchKeys) {
-      const directHit = this.fastProbabilisticSearch(attachDir, key)
+      const directHit = this.fastProbabilisticSearch(attachDir, key, allowThumbnail)
       if (directHit) return directHit
     }
 
-    const legacyHit = this.findImageFileInLegacyDirs(accountDir, searchKeys[0])
+    const legacyHit = this.findImageFileInLegacyDirs(accountDir, searchKeys[0], allowThumbnail)
     if (legacyHit) return legacyHit
 
     console.log('[ImageDecrypt] findImageFile miss for:', searchKeys)
     return null
   }
 
-  private fastProbabilisticSearch(attachDir: string, datName: string): string | null {
+  private fastProbabilisticSearch(
+    attachDir: string,
+    datName: string,
+    allowThumbnail = true
+  ): string | null {
     const normalized = this.normalizeDatBase(datName)
     if (!normalized) return null
 
@@ -131,7 +144,7 @@ export class ImageDecryptService {
           join(attachDir, dir1, dir2, 'Image', variant),
           join(attachDir, dir1, dir2, 'image', variant)
         ]
-        const found = this.getLargestExistingPath(candidates, true)
+        const found = this.getLargestExistingPath(candidates, allowThumbnail)
         if (found) {
           console.log('[ImageDecrypt] prefix path hit:', found)
           return found
@@ -159,7 +172,7 @@ export class ImageDecryptService {
 
             const found = this.getLargestExistingPath(
               variants.map((variant) => join(imgDir, variant)),
-              true
+              allowThumbnail
             )
             if (found) {
               console.log('[ImageDecrypt] found at:', found)
@@ -175,7 +188,11 @@ export class ImageDecryptService {
     return null
   }
 
-  private findImageFileInLegacyDirs(accountDir: string, datName: string): string | null {
+  private findImageFileInLegacyDirs(
+    accountDir: string,
+    datName: string,
+    allowThumbnail = true
+  ): string | null {
     const normalized = this.normalizeDatBase(datName)
     if (!normalized) return null
 
@@ -186,18 +203,27 @@ export class ImageDecryptService {
     ].filter((root) => existsSync(root))
 
     for (const root of roots) {
-      const found = this.recursiveFindDat(root, normalized, 5)
+      const found = this.recursiveFindDat(root, normalized, 5, allowThumbnail)
       if (found) return found
     }
 
     return null
   }
 
-  private recursiveFindDat(dir: string, datName: string, depth: number): string | null {
+  private recursiveFindDat(
+    dir: string,
+    datName: string,
+    depth: number,
+    allowThumbnail = true
+  ): string | null {
     if (depth < 0) return null
 
     try {
-      const variants = new Set(this.buildPreferredDatNames(datName))
+      const variants = new Set(
+        this.buildPreferredDatNames(datName).filter(
+          (name) => allowThumbnail || !this.isThumbnailName(name)
+        )
+      )
       const entries = readdirSync(dir)
       for (const entry of entries) {
         const fullPath = join(dir, entry)
@@ -211,7 +237,7 @@ export class ImageDecryptService {
       for (const entry of entries) {
         const fullPath = join(dir, entry)
         if (!statSync(fullPath).isDirectory()) continue
-        const found = this.recursiveFindDat(fullPath, datName, depth - 1)
+        const found = this.recursiveFindDat(fullPath, datName, depth - 1, allowThumbnail)
         if (found) return found
       }
     } catch {
@@ -422,6 +448,8 @@ export class ImageDecryptService {
       `${base}.dat`,
       `${base}_hd.dat`,
       `${base}_h.dat`,
+      `${base}_b.dat`,
+      `${base}_w.dat`,
       `${base}_c.dat`,
       `${base}_t.dat`,
       `${base}.thumb.dat`,
@@ -470,6 +498,10 @@ export class ImageDecryptService {
     return lower.includes('_t.dat') || lower.includes('_thumb.dat') || lower.includes('.thumb.dat')
   }
 
+  isThumbnailFile(filePath: string): boolean {
+    return this.isThumbnailName(basename(filePath))
+  }
+
   private unwrapWxgf(buffer: Buffer): Buffer {
     if (
       buffer.length < 20 ||

src/main/index.ts

@@ -1,4 +1,4 @@
-import './preload-env'
+import './preload-env'
 import { app, shell, BrowserWindow, ipcMain, nativeImage, clipboard, Menu, Tray } from 'electron'
 import { join } from 'path'
 import { electronApp, optimizer, is } from '@electron-toolkit/utils'
@@ -76,7 +76,7 @@ function getConfiguredImageKeys(): { xorKey: string; aesKey: string } {
 
 
 function createWindow(): void {
-  // 创建浏览器窗口
+  // 鍒涘缓娴忚鍣ㄧ獥鍙?
   const mainWindow = new BrowserWindow({
     width: 1400,
     height: 800,
@@ -98,8 +98,8 @@ function createWindow(): void {
     return { action: 'deny' }
   })
 
-  // 基于 electron-vite cli 的渲染器 HMR
+  // 鍩轰簬 electron-vite cli 鐨勬覆鏌撳櫒 HMR
-  // 加载开发环境的远程 URL 或生产环境的本地 html 文件
+  // 鍔犺浇寮€鍙戠幆澧冪殑杩滅▼ URL 鎴栫敓浜х幆澧冪殑鏈湴 html 鏂囦欢
   if (is.dev && process.env['ELECTRON_RENDERER_URL']) {
     mainWindow.loadURL(process.env['ELECTRON_RENDERER_URL'])
   } else {
@@ -107,8 +107,8 @@ function createWindow(): void {
   }
 }
 
-// 当 Electron 完成初始化并准备好创建浏览器窗口时，将调用此方法
+// 褰?Electron 瀹屾垚鍒濆鍖栧苟鍑嗗濂藉垱寤烘祻瑙堝櫒绐楀彛鏃讹紝灏嗚皟鐢ㄦ鏂规硶
-// 某些 API 只能在此事件发生后使用
+// 鏌愪簺 API 鍙兘鍦ㄦ浜嬩欢鍙戠敓鍚庝娇鐢?
 app.whenReady().then(async () => {
   console.log(`WechatExplorer main build: ${BUILD_MARK}`)
 
@@ -122,12 +122,12 @@ app.whenReady().then(async () => {
     console.error('[WCDB4] bootstrap failed at whenReady top:', bootstrapError)
   }
 
-  // 为窗口设置应用程序用户模型 ID
+  // 涓虹獥鍙ｈ缃簲鐢ㄧ▼搴忕敤鎴锋ā鍨?ID
   electronApp.setAppUserModelId('com.electron')
 
-  // 在开发环境中默认按 F12 打开或关闭 DevTools
+  // 鍦ㄥ紑鍙戠幆澧冧腑榛樿鎸?F12 鎵撳紑鎴栧叧闂?DevTools
-  // 在生产环境中忽略 CommandOrControl + R
+  // 鍦ㄧ敓浜х幆澧冧腑蹇界暐 CommandOrControl + R
-  // 参见 https://github.com/alex8088/electron-toolkit/tree/master/packages/utils
+  // 鍙傝 https://github.com/alex8088/electron-toolkit/tree/master/packages/utils
   app.on('browser-window-created', (_, window) => {
     optimizer.watchWindowShortcuts(window)
   })
@@ -297,7 +297,7 @@ app.whenReady().then(async () => {
         return { success: false, error: '未配置 API Key' }
       }
 
-      // 动态导入以避免如果未安装或初始类型缺失的问题
+      // 鍔ㄦ€佸鍏ヤ互閬垮厤濡傛灉鏈畨瑁呮垨鍒濆绫诲瀷缂哄け鐨勯棶棰?
       const { OpenAI } = await import('openai')
 
       const openai = new OpenAI({
@@ -358,20 +358,38 @@ app.whenReady().then(async () => {
 
   ipcMain.handle(
     'db:getImage',
-    async (_, imageMd5?: string, imageDatNameOrThumb?: string | boolean, _sessionId?: string) => {
+    async (
+      _,
+      imageMd5?: string,
+      imageDatNameOrThumb?: string | boolean,
+      _sessionId?: string,
+      options?: { force?: boolean }
+    ) => {
       void _sessionId
       if (!imageDecryptService) {
         const { xorKey, aesKey } = getConfiguredImageKeys()
         if (!aesKey) {
           return { success: false, error: '未配置图片解密密钥' }
         }
-        imageDecryptService = new ImageDecryptService(xorKey, aesKey, chat.getChatDb()?.getWcdb4Client())
+        imageDecryptService = new ImageDecryptService(
+          xorKey,
+          aesKey,
+          chat.getChatDb()?.getWcdb4Client()
+        )
       }
 
       const imageDatName = typeof imageDatNameOrThumb === 'string' ? imageDatNameOrThumb : undefined
-      const filePath = imageDecryptService.findImageFile(imageMd5, imageDatName)
+      const force = options?.force === true
+      let filePath = force
+        ? imageDecryptService.findImageFile(imageMd5, imageDatName, { allowThumbnail: false })
+        : null
       if (!filePath) {
-        return { success: false, error: '未找到图片文件' }
+        filePath = imageDecryptService.findImageFile(imageMd5, imageDatName, {
+          allowThumbnail: true
+        })
+      }
+      if (!filePath) {
+        return { success: false, error: force ? '未找到原图或缩略图文件' : '未找到图片文件' }
       }
 
       const base64 = imageDecryptService.decryptImageToBase64(filePath)
@@ -379,7 +397,12 @@ app.whenReady().then(async () => {
         return { success: false, error: '图片解密失败' }
       }
 
-      return { success: true, data: base64 }
+      return {
+        success: true,
+        data: base64,
+        isThumb: imageDecryptService.isThumbnailFile(filePath),
+        filePath
+      }
     }
   )
 
@@ -451,7 +474,7 @@ app.whenReady().then(async () => {
 
   createWindow()
 
-  // 启动本地 HTTP API(根据 settings.apiEnabled 控制)
+  // 鍚姩鏈湴 HTTP API(鏍规嵁 settings.apiEnabled 鎺у埗)
   const settings = loadSettings()
   if (settings.apiEnabled) {
     await apiServer.start(settings.apiHost, settings.apiPort)
@@ -463,15 +486,15 @@ app.whenReady().then(async () => {
   }
 
   app.on('activate', function () {
-    // 在 macOS 上，当点击 dock 图标且没有其他窗口打开时，
+    // 鍦?macOS 涓婏紝褰撶偣鍑?dock 鍥炬爣涓旀病鏈夊叾浠栫獥鍙ｆ墦寮€鏃讹紝
-    // 通常会在应用程序中重新创建一个窗口。
+    // 閫氬父浼氬湪搴旂敤绋嬪簭涓噸鏂板垱寤轰竴涓獥鍙ｃ€?
     if (BrowserWindow.getAllWindows().length === 0) createWindow()
   })
 })
 
-// 当所有窗口关闭时退出，除了 macOS。在那里，
+// 褰撴墍鏈夌獥鍙ｅ叧闂椂閫€鍑猴紝闄や簡 macOS銆傚湪閭ｉ噷锛?
-// 应用程序及其菜单栏通常会保持活动状态，直到用户
+// 搴旂敤绋嬪簭鍙婂叾鑿滃崟鏍忛€氬父浼氫繚鎸佹椿鍔ㄧ姸鎬侊紝鐩村埌鐢ㄦ埛
-// 显式使用 Cmd + Q 退出。
+// 鏄惧紡浣跨敤 Cmd + Q 閫€鍑恒€?
 app.on('window-all-closed', () => {
   if (TRAY_MODE) return
   if (process.platform !== 'darwin') {

src/preload/index.d.ts

@@ -76,8 +76,9 @@ declare global {
       getImage: (
         imageMd5?: string,
         imageDatNameOrThumb?: string | boolean,
-        sessionId?: string
+        sessionId?: string,
-      ) => Promise<{ success: boolean; data?: string; error?: string }>
+        options?: { force?: boolean }
+      ) => Promise<{ success: boolean; data?: string; error?: string; isThumb?: boolean; filePath?: string }>
       getSticker: (
         cdnUrl?: string,
         md5?: string

src/preload/index.ts

@@ -27,8 +27,12 @@ const api = {
     ipcRenderer.invoke('db:getVoiceData', sessionId, localId, createTime, svrId),
   parseMessage: (content: string, messageType: number) =>
     ipcRenderer.invoke('db:parseMessage', content, messageType),
-  getImage: (imageMd5?: string, imageDatNameOrThumb?: string | boolean, sessionId?: string) =>
+  getImage: (
-    ipcRenderer.invoke('db:getImage', imageMd5, imageDatNameOrThumb, sessionId),
+    imageMd5?: string,
+    imageDatNameOrThumb?: string | boolean,
+    sessionId?: string,
+    options?: { force?: boolean }
+  ) => ipcRenderer.invoke('db:getImage', imageMd5, imageDatNameOrThumb, sessionId, options),
   getSticker: (cdnUrl?: string, md5?: string) => ipcRenderer.invoke('db:getSticker', cdnUrl, md5),
   exportGroupReport: (request: GroupReportExportRequest) =>
     ipcRenderer.invoke('report:export', request),

src/renderer/src/assets/main.css

@@ -456,6 +456,20 @@ body {
   opacity: 1;
 }
 
+.image-quality-badge {
+  position: absolute;
+  left: 6px;
+  top: 6px;
+  max-width: calc(100% - 12px);
+  padding: 3px 6px;
+  border-radius: 5px;
+  background: rgba(0, 0, 0, 0.5);
+  color: #fff;
+  font-size: 11px;
+  line-height: 1.3;
+  pointer-events: none;
+}
+
 .image-action-btn {
   border: 0;
   border-radius: 5px;

src/renderer/src/components/ImageBubble.tsx

@@ -18,7 +18,9 @@ export function ImageBubble({
 }: ImageBubbleProps): JSX.Element {
   const [imageUrl, setImageUrl] = useState<string | null>(null)
   const [loading, setLoading] = useState(false)
+  const [upgrading, setUpgrading] = useState(false)
   const [error, setError] = useState<string | null>(null)
+  const [isThumbnail, setIsThumbnail] = useState(false)
   const containerRef = useRef<HTMLDivElement>(null)
 
   const loadImage = useCallback(async () => {
@@ -31,22 +33,18 @@ export function ImageBubble({
     setLoading(true)
     try {
       const result = await window.api.getImage(imageMd5, imageDatName || isThumb, sessionId)
-      if (result.success && result.data) {
+      if (result.success && result.data?.startsWith('data:image/')) {
-        // 验证返回的是否是有效的图片 data URL
+        setImageUrl(result.data)
-        if (result.data.startsWith('data:image/')) {
+        setIsThumbnail(Boolean(result.isThumb))
-          setImageUrl(result.data)
+        setError(null)
-          setError(null)
-        } else {
-          // 解密后不是有效图片格式，显示未解密
-          setError('未解密')
-        }
       } else {
         setError(result.error || '加载图片失败')
       }
     } catch {
       setError('加载图片失败')
+    } finally {
+      setLoading(false)
     }
-    setLoading(false)
   }, [imageMd5, imageDatName, sessionId, isThumb, imageUrl, loading])
 
   useEffect(() => {
@@ -71,16 +69,42 @@ export function ImageBubble({
 
   const handleCopy = async (event: MouseEvent): Promise<void> => {
     event.stopPropagation()
-    if (imageUrl) {
+    if (!imageUrl) return
-      await window.api.copyImage(imageUrl)
+    await window.api.copyImage(imageUrl)
-      alert('图片已复制')
+    alert('图片已复制')
-    }
   }
 
-  const handleClick = (): void => {
+  const handleClick = async (): Promise<void> => {
-    if (imageUrl) {
+    if (!imageUrl && !error) return
-      onImageClick?.(imageUrl)
+    if (!imageMd5 && !imageDatName) {
+      if (imageUrl) onImageClick?.(imageUrl)
+      return
     }
+
+    if (upgrading) {
+      if (imageUrl) onImageClick?.(imageUrl)
+      return
+    }
+
+    setUpgrading(true)
+    try {
+      const result = await window.api.getImage(imageMd5, imageDatName || isThumb, sessionId, {
+        force: true
+      })
+      if (result.success && result.data?.startsWith('data:image/')) {
+        setImageUrl(result.data)
+        setIsThumbnail(Boolean(result.isThumb))
+        setError(null)
+        onImageClick?.(result.data)
+        return
+      }
+    } catch {
+      // Fall back to the already visible image.
+    } finally {
+      setUpgrading(false)
+    }
+
+    if (imageUrl) onImageClick?.(imageUrl)
   }
 
   if (loading) {
@@ -94,7 +118,7 @@ export function ImageBubble({
   if (error) {
     return (
       <div className="image-bubble image-error" onClick={loadImage}>
-        <div className="image-error-text">图片未加载</div>
+        <div className="image-error-text">{error || '图片未加载'}</div>
       </div>
     )
   }
@@ -102,8 +126,8 @@ export function ImageBubble({
   if (!imageUrl) {
     return (
       <div ref={containerRef} className="image-bubble image-placeholder">
-        <div className="image-placeholder-icon">🖼</div>
+        <div className="image-placeholder-icon">图</div>
-        <div className="image-placeholder-text">加载图片中</div>
+        <div className="image-placeholder-text">加载图片中...</div>
       </div>
     )
   }
@@ -111,9 +135,12 @@ export function ImageBubble({
   return (
     <div className="image-bubble image-loaded" onClick={handleClick}>
       <img src={imageUrl} alt="图片" className="image-content" />
+      {(upgrading || isThumbnail) && (
+        <div className="image-quality-badge">{upgrading ? '查找原图...' : '缩略图'}</div>
+      )}
       <div className="image-actions">
         <button className="image-action-btn" onClick={handleCopy} title="复制图片">
-          📋
+          复制
         </button>
       </div>
     </div>