diff --git a/electron/electron-menu.js b/electron/electron-menu.js
index 1cc656588..4a64a9307 100644
--- a/electron/electron-menu.js
+++ b/electron/electron-menu.js
@@ -9,6 +9,7 @@ const {
 const fs = require('fs')
 const url = require('url')
 const request = require("request");
+const utils = require('./utils')
 
 const MAILTO_PREFIX = "mailto:";
 
@@ -52,9 +53,30 @@ const electronMenu = {
     },
 
     async saveImageAs(url, params) {
-        const targetFileName = params.suggestedFilename || params.altText || "image.png";
+        let extension = '';
+        if (utils.isProtocolResource(url)) {
+            extension = utils.protocolResourcePath(url).split('.').pop().toLowerCase();
+        } else {
+            const urlExtension = url.split('.').pop().split(/[#?]/)[0].toLowerCase();
+            if (['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'].includes(urlExtension)) {
+                extension = urlExtension;
+            }
+        }
+        
+        if (!extension) {
+            extension = 'png';
+        }
+
+        let targetFileName = params.suggestedFilename || params.altText || "image";
+        if (!targetFileName.toLowerCase().endsWith('.' + extension)) {
+            targetFileName = targetFileName.replace(/\.[^/.]+$/, '') + '.' + extension;
+        }
+
         const {filePath} = await dialog.showSaveDialog({
             defaultPath: targetFileName,
+            filters: [
+                { name: 'Images', extensions: ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'] }
+            ]
         });
 
         if (!filePath) return; // user cancelled dialog
@@ -62,6 +84,8 @@ const electronMenu = {
         try {
             if (electronMenu.isBlobOrDataUrl(url)) {
                 await electronMenu.writeNativeImage(filePath, nativeImage.createFromDataURL(url));
+            } else if (utils.isProtocolResource(url)) {
+                await fs.promises.copyFile(utils.protocolResourcePath(url), filePath);
             } else {
                 const writeStream = fs.createWriteStream(filePath)
                 const readStream = request(url)
@@ -98,7 +122,7 @@ const electronMenu = {
                 const url = params.linkURL || params.srcURL;
                 const popupMenu = new Menu();
 
-                if (!electronMenu.isBlobOrDataUrl(url)) {
+                if (!electronMenu.isBlobOrDataUrl(url) && !utils.isProtocolResource(url)) {
                     popupMenu.append(
                         new MenuItem({
                             label: electronMenu.language.openInBrowser,
@@ -144,7 +168,7 @@ const electronMenu = {
                                 },
                             }),
                         );
-                    } else {
+                    } else if (!utils.isProtocolResource(url)) {
                         popupMenu.append(
                             new MenuItem({
                                 label: params.hasImageContents ? electronMenu.language.copyImageAddress : electronMenu.language.copyLinkAddress,
diff --git a/electron/electron.js b/electron/electron.js
index 61eeb8676..0391530f4 100644
--- a/electron/electron.js
+++ b/electron/electron.js
@@ -76,21 +76,19 @@ protocol.registerSchemesAsPrivileged([
  */
 function createProtocol() {
     protocol.handle('dootask-resources', async (request) => {
-        const url = request.url.replace(/^dootask-resources:\/\//, '')
+        const url = utils.protocolResourcePath(request.url)
 
         if (url.includes('..')) {
             return new Response('Access Denied', { status: 403 })
         }
 
         try {
-            const filePath = path.join(__dirname, devloadUrl ? '..' : '.', url)
-
-            if (!fs.existsSync(filePath)) {
+            if (!fs.existsSync(url)) {
                 return new Response('Not Found', { status: 404 })
             }
 
-            const data = await fs.promises.readFile(filePath)
-            const mimeType = utils.getMimeType(filePath)
+            const data = await fs.promises.readFile(url)
+            const mimeType = utils.getMimeType(url)
 
             return new Response(data, {
                 headers: {
diff --git a/electron/utils.js b/electron/utils.js
index 79595b157..082eaf89c 100644
--- a/electron/utils.js
+++ b/electron/utils.js
@@ -606,6 +606,39 @@ const utils = {
             });
         });
     },
+
+    /**
+     * 是否协议资源
+     * @param {string} url 
+     * @returns {boolean}
+     */
+    isProtocolResource(url) {
+        return url.startsWith('dootask-resources://')
+    },
+
+    /**
+     * 协议资源路径
+     * @param {string} url 
+     * @returns {string}
+     */
+    protocolResourcePath(url) {
+        if (!utils.isProtocolResource(url)) {
+            return url
+        }
+
+        let p0 = url.replace(/^dootask-resources:\/\//, '')
+
+        const p1 = path.join(__dirname, '.', p0)
+        if (fs.existsSync(p1)) {
+            return p1
+        } 
+
+        const p2 = path.join(__dirname, '..', p0)
+        if (fs.existsSync(p2)) {
+            return p2
+        }
+        return url
+    }
 }
 
 module.exports = utils;
diff --git a/resources/assets/js/components/Replace/utils.js b/resources/assets/js/components/Replace/utils.js
index 37d4a2f76..a3e84a9fa 100644
--- a/resources/assets/js/components/Replace/utils.js
+++ b/resources/assets/js/components/Replace/utils.js
@@ -62,4 +62,11 @@ const publicImageResources = (() => {
     }
 })()
 
-export {publicImageResources}
+const isPublicResources = (url) => {
+    return url && (
+        url.startsWith('file://') || 
+        url.startsWith('dootask-resources://')
+    )
+}
+
+export {publicImageResources, isPublicResources}
diff --git a/resources/assets/js/pages/manage/components/DialogWrapper.vue b/resources/assets/js/pages/manage/components/DialogWrapper.vue
index d16e5b31b..eff26a6e6 100644
--- a/resources/assets/js/pages/manage/components/DialogWrapper.vue
+++ b/resources/assets/js/pages/manage/components/DialogWrapper.vue
@@ -673,6 +673,7 @@ import DialogGroupVote from "./DialogGroupVote";
 import DialogComplaint from "./DialogComplaint";
 import touchclick from "../../../directives/touchclick";
 import {languageList} from "../../../language";
+import {isPublicResources} from "../../../components/Replace/utils";
 
 export default {
     name: "DialogWrapper",
@@ -2879,7 +2880,7 @@ export default {
                 })
             }
             if (msgData.type === 'text') {
-                if (event.target.nodeName === 'IMG') {
+                if (event.target.nodeName === 'IMG' && !isPublicResources(event.target.currentSrc)) {
                     this.operateCopys.push({
                         type: 'imagedown',
                         icon: '',
diff --git a/resources/mobile b/resources/mobile
index c5f85805d..9804c916c 160000
--- a/resources/mobile
+++ b/resources/mobile
@@ -1 +1 @@
-Subproject commit c5f85805ddd9f9cc36924b018a1fd779d70025fa
+Subproject commit 9804c916c25dd6a413b489096675286548e36f40