diff --git a/electron/electron-down.js b/electron/electron-down.js
index 81b56443d..67d617923 100644
--- a/electron/electron-down.js
+++ b/electron/electron-down.js
@@ -63,7 +63,7 @@ function initialize(onStarted = null, onChanged = null) {
     });
 
     // IPC
-    ipcMain.handle('downloadManager', async (event, {action, path, msgId}) => {
+    ipcMain.handle('downloadManager', async (event, {action, path, msgId, file, files}) => {
         switch (action) {
             case "get": {
                 return {
@@ -93,12 +93,14 @@ function initialize(onStarted = null, onChanged = null) {
             case "remove": {
                 downloadManager.remove(path);
                 syncDownloadItems();
+                notifyChanged();
                 return true;
             }
 
             case "removeAll": {
                 downloadManager.removeAll();
                 syncDownloadItems();
+                notifyChanged();
                 return true;
             }
 
@@ -130,6 +132,22 @@ function initialize(onStarted = null, onChanged = null) {
                 shell.showItemInFolder(file.path);
                 return true;
             }
+
+            case "fileStatuses": {
+                if (!Array.isArray(files)) {
+                    return {};
+                }
+                return downloadManager.getFileStatuses(files.slice(0, 500));
+            }
+
+            case "showFile": {
+                const localFile = downloadManager.getFileStatus(file);
+                if (localFile.status !== 'available') {
+                    return false;
+                }
+                shell.showItemInFolder(localFile.path);
+                return true;
+            }
         }
     });
 }
diff --git a/electron/lib/download-manager.js b/electron/lib/download-manager.js
index f9404fb9c..efb60cc4d 100644
--- a/electron/lib/download-manager.js
+++ b/electron/lib/download-manager.js
@@ -103,12 +103,27 @@ class DownloadManager {
      * @returns {{status: 'available'|'downloading'|'missing', path?: string}}
      */
     getMessageFileStatus(msgId) {
-        const targetId = parseInt(msgId, 10);
-        if (!targetId) {
+        return this.getFileStatus({msgId});
+    }
+
+    /**
+     * 获取会话附件对应的下载状态。
+     *
+     * @param {{msgId?: number|string, attachmentId?: number|string}} reference
+     * @returns {{status: 'available'|'downloading'|'missing', path?: string}}
+     */
+    getFileStatus(reference = {}) {
+        const msgId = parseInt(reference.msgId, 10) || 0;
+        const attachmentId = parseInt(reference.attachmentId, 10) || 0;
+        if (!msgId && !attachmentId) {
             return {status: 'missing'};
         }
 
-        const items = this.downloadHistory.filter(item => this.getMessageFileId(item) === targetId);
+        const items = this.downloadHistory.filter(item => {
+            const file = this.getFileReference(item);
+            return (msgId > 0 && file.msgId === msgId)
+                || (attachmentId > 0 && file.attachmentId === attachmentId);
+        });
         const downloading = items.some(item => item.state === 'progressing' && !item.paused);
         if (downloading) {
             return {status: 'downloading'};
@@ -118,6 +133,58 @@ class DownloadManager {
         return available ? {status: 'available', path: available.path} : {status: 'missing'};
     }
 
+    /**
+     * 批量获取会话附件的下载状态，只扫描一次下载历史。
+     *
+     * @param {Array<{key: string, msgId?: number|string, attachmentId?: number|string}>} references
+     * @returns {Object<string, 'available'|'downloading'|'missing'>}
+     */
+    getFileStatuses(references = []) {
+        const statuses = {};
+        const msgKeys = new Map();
+        const attachmentKeys = new Map();
+        const addKey = (map, id, key) => {
+            if (!id) return;
+            if (!map.has(id)) map.set(id, []);
+            map.get(id).push(key);
+        };
+
+        references.forEach(reference => {
+            if (!reference || typeof reference !== 'object') return;
+            const key = `${reference.key || ''}`;
+            if (!key) return;
+            const msgId = parseInt(reference.msgId, 10) || 0;
+            const attachmentId = parseInt(reference.attachmentId, 10) || 0;
+            statuses[key] = 'missing';
+            addKey(msgKeys, msgId, key);
+            addKey(attachmentKeys, attachmentId, key);
+        });
+
+        this.downloadHistory.forEach(item => {
+            const file = this.getFileReference(item);
+            const keys = new Set([
+                ...(msgKeys.get(file.msgId) || []),
+                ...(attachmentKeys.get(file.attachmentId) || []),
+            ]);
+            if (!keys.size) return;
+
+            let status = '';
+            if (item.state === 'progressing' && !item.paused) {
+                status = 'downloading';
+            } else if (item.state === 'completed' && item.path && fs.existsSync(item.path)) {
+                status = 'available';
+            }
+            if (!status) return;
+
+            keys.forEach(key => {
+                if (status === 'downloading' || statuses[key] === 'missing') {
+                    statuses[key] = status;
+                }
+            });
+        });
+        return statuses;
+    }
+
     /**
      * 从下载地址中识别聊天文件消息 ID。
      *
@@ -125,6 +192,17 @@ class DownloadManager {
      * @returns {number}
      */
     getMessageFileId(item) {
+        return this.getFileReference(item).msgId;
+    }
+
+    /**
+     * 从下载地址中识别会话消息或协作附件 ID。
+     *
+     * @param {Object} item
+     * @returns {{msgId: number, attachmentId: number}}
+     */
+    getFileReference(item) {
+        const reference = {msgId: 0, attachmentId: 0};
         const urls = [...(Array.isArray(item.urls) ? item.urls : []), item.url].filter(Boolean);
         for (const value of urls) {
             try {
@@ -132,14 +210,19 @@ class DownloadManager {
                 if (url.pathname.endsWith('/api/dialog/msg/download')) {
                     const msgId = parseInt(url.searchParams.get('msg_id'), 10);
                     if (msgId > 0) {
-                        return msgId;
+                        reference.msgId = msgId;
+                    }
+                } else if (url.pathname.endsWith('/api/file/collaboration/download')) {
+                    const attachmentId = parseInt(url.searchParams.get('attachment_id'), 10);
+                    if (attachmentId > 0) {
+                        reference.attachmentId = attachmentId;
                     }
                 }
             } catch {
                 // Ignore malformed history URLs.
             }
         }
-        return 0;
+        return reference;
     }
 
     /**
diff --git a/resources/ai-kb/zh/howto/file/collaboration.md b/resources/ai-kb/zh/howto/file/collaboration.md
index e62a6a3df..52f211f39 100644
--- a/resources/ai-kb/zh/howto/file/collaboration.md
+++ b/resources/ai-kb/zh/howto/file/collaboration.md
@@ -34,6 +34,8 @@ last_verified: v1.8.89
 
 文件消息和粘贴、插入到聊天正文中的图片都会汇总到协作文件。一条聊天消息包含多张图片时，每张图片会作为一条独立记录展示。图片会在列表和宫格中直接显示缩略图；缩略图不可用时显示对应的文件类型图标。
 
+Electron 桌面客户端会同步会话文件与协作文件的本地下载状态：未下载时显示下载图标，下载中显示加载图标；下载完成且本地文件仍存在时显示文件夹图标，点击可在资源管理器或 Finder 中定位文件。清除下载历史，或移动、改名、删除本地文件后，操作会恢复为下载图标。正文图片等独立附件也支持相同操作。
+
 ## 权限与范围
 - 只展示当前用户仍有权访问的来源；退出会话、项目或任务权限变化后，对应文件不再显示。
 - 已撤回或删除的文件消息、正文图片不显示；编辑消息移除图片后，对应图片也不再显示。
diff --git a/resources/assets/js/pages/manage/components/CollaborationFileList.vue b/resources/assets/js/pages/manage/components/CollaborationFileList.vue
index 875303f3c..11c2f22d5 100644
--- a/resources/assets/js/pages/manage/components/CollaborationFileList.vue
+++ b/resources/assets/js/pages/manage/components/CollaborationFileList.vue
@@ -99,8 +99,14 @@
                         <span class="time-text">{{formatTime(item.created_at)}}</span>
                         <span class="size-text">{{$A.bytesToSize(item.size)}}</span>
                         <div class="row-actions">
-                            <ETooltip :content="$L('打开来源')"><button @click="locateMessage(item)"><Icon type="md-open"/></button></ETooltip>
-                            <ETooltip :content="$L('下载')"><button @click="download(item)"><Icon type="md-download"/></button></ETooltip>
+                            <ETooltip :content="$L('打开来源')"><button @click="locateMessage(item)"><CollaborationSourceIcon/></button></ETooltip>
+                            <ETooltip :content="localActionTitle(item)">
+                                <button
+                                    :disabled="localFileStatus(item) === 'downloading'"
+                                    @click="handleLocalAction(item)">
+                                    <LocalFileStatusIcon :status="localFileStatus(item)"/>
+                                </button>
+                            </ETooltip>
                         </div>
                     </div>
                 </div>
@@ -123,8 +129,13 @@
                         </div>
                         <div class="grid-meta">{{item.sender.nickname || $L('未知成员')}} · {{formatTime(item.created_at)}}</div>
                         <div class="grid-actions" @click.stop>
-                            <button :title="$L('打开来源')" @click="locateMessage(item)"><Icon type="md-open"/></button>
-                            <button :title="$L('下载')" @click="download(item)"><Icon type="md-download"/></button>
+                            <button :title="$L('打开来源')" @click="locateMessage(item)"><CollaborationSourceIcon/></button>
+                            <button
+                                :title="localActionTitle(item)"
+                                :disabled="localFileStatus(item) === 'downloading'"
+                                @click="handleLocalAction(item)">
+                                <LocalFileStatusIcon :status="localFileStatus(item)"/>
+                            </button>
                         </div>
                     </div>
                 </div>
@@ -142,11 +153,14 @@
 <script>
 import {mapState} from "vuex";
 import {openFileInClient} from "../../../utils/file";
+import CollaborationSourceIcon from "./CollaborationSourceIcon.vue";
+import LocalFileStatusIcon from "./DialogView/LocalFileStatusIcon.vue";
 
 const CACHE_VERSION = 1;
 
 export default {
     name: "CollaborationFileList",
+    components: {CollaborationSourceIcon, LocalFileStatusIcon},
     props: {
         searchKey: {
             type: String,
@@ -169,6 +183,8 @@ export default {
             initializing: true,
             searchTimer: null,
             requestId: 0,
+            localFileStatuses: {},
+            removeDownloadListener: null,
         }
     },
     computed: {
@@ -223,11 +239,20 @@ export default {
     },
     mounted() {
         this.$store.dispatch('getProjects').catch(() => {});
+        if (this.$Electron) {
+            this.removeDownloadListener = $A.Electron.listener('downloadItemsChanged', () => {
+                this.refreshLocalFileStatuses();
+            });
+            this.refreshLocalFileStatuses();
+        }
         this.refresh();
         this.initializing = false;
     },
     beforeDestroy() {
         clearTimeout(this.searchTimer);
+        if (typeof this.removeDownloadListener === 'function') {
+            this.removeDownloadListener();
+        }
     },
     methods: {
         setScope(scope) {
@@ -256,6 +281,7 @@ export default {
             this.loading = 0;
             if (!keepItems) {
                 this.items = [];
+                this.localFileStatuses = {};
             }
             this.cursor = 0;
             this.hasMore = false;
@@ -286,6 +312,7 @@ export default {
                 } else {
                     this.items.push(...data.list);
                 }
+                this.refreshLocalFileStatuses(data.list);
                 this.cursor = data.next_cursor;
                 this.hasMore = data.has_more;
                 if (replace && !this.searchKey.trim()) {
@@ -368,6 +395,40 @@ export default {
         itemKey(item) {
             return item.attachment_id ? `attachment-${item.attachment_id}` : `message-${item.msg_id}`;
         },
+        fileReference(item) {
+            return {
+                key: this.itemKey(item),
+                msgId: item.msg_id,
+                attachmentId: item.attachment_id,
+            };
+        },
+        localFileStatus(item) {
+            if (!this.$Electron) return 'missing';
+            return this.localFileStatuses[this.itemKey(item)] || 'missing';
+        },
+        localActionTitle(item) {
+            if (this.localFileStatus(item) === 'available') {
+                return this.$L('在文件夹中显示');
+            }
+            return this.$L('下载');
+        },
+        async refreshLocalFileStatuses(items = this.items) {
+            if (!this.$Electron || !items.length) return;
+            const references = items.map(item => this.fileReference(item));
+            const batches = [];
+            for (let index = 0; index < references.length; index += 500) {
+                batches.push(references.slice(index, index + 500));
+            }
+            try {
+                const results = await Promise.all(batches.map(files => $A.Electron.sendAsync('downloadManager', {
+                    action: 'fileStatuses',
+                    files,
+                })));
+                this.localFileStatuses = Object.assign({}, this.localFileStatuses, ...results);
+            } catch {
+                // Keep the download action available when local history cannot be read.
+            }
+        },
         showThumbnail(item) {
             return !!item.image_url && !item._thumbnailError;
         },
@@ -437,16 +498,45 @@ export default {
                 search_msg_id: item.msg_id,
             }).catch(({msg}) => msg && $A.modalError(msg));
         },
-        download(item) {
-            const url = item.attachment_id
+        downloadUrl(item) {
+            if (item.attachment_source === 'file_message') {
+                return `dialog/msg/download?msg_id=${item.msg_id}`;
+            }
+            return item.attachment_id
                 ? `file/collaboration/download?attachment_id=${item.attachment_id}`
                 : `dialog/msg/download?msg_id=${item.msg_id}`;
+        },
+        async handleLocalAction(item) {
+            if (!this.$Electron) {
+                this.download(item);
+                return;
+            }
+            const status = this.localFileStatus(item);
+            if (status === 'downloading') return;
+            if (status === 'available') {
+                try {
+                    const shown = await $A.Electron.sendAsync('downloadManager', {
+                        action: 'showFile',
+                        file: this.fileReference(item),
+                    });
+                    if (shown) return;
+                } catch {
+                    // Refresh the action when the local file cannot be revealed.
+                }
+                this.$set(this.localFileStatuses, this.itemKey(item), 'missing');
+                return;
+            }
+            this.$set(this.localFileStatuses, this.itemKey(item), 'downloading');
+            this.$store.dispatch('downUrl', $A.apiUrl(this.downloadUrl(item)));
+            setTimeout(() => this.refreshLocalFileStatuses([item]), 500);
+        },
+        download(item) {
             $A.modalConfirm({
                 language: false,
                 title: this.$L('下载文件'),
                 okText: this.$L('立即下载'),
                 content: `${this.fileName(item)} (${$A.bytesToSize(item.size)})`,
-                onOk: () => this.$store.dispatch('downUrl', $A.apiUrl(url)),
+                onOk: () => this.$store.dispatch('downUrl', $A.apiUrl(this.downloadUrl(item))),
             });
         },
     },
@@ -724,12 +814,17 @@ export default {
     .ivu-tooltip-rel button {
         width: 30px;
         height: 30px;
+        display: inline-flex;
+        align-items: center;
+        justify-content: center;
         border: 0;
         border-radius: 5px;
         color: $primary-text-color;
         background: transparent;
         cursor: pointer;
         &:hover { color: $primary-color; background: rgba($primary-color, 0.08); }
+        &:disabled { cursor: default; }
+        .common-loading { width: 16px; height: 16px; }
     }
 }
 .collaboration-grid {
@@ -784,7 +879,19 @@ export default {
         top: 10px;
         right: 8px;
         display: flex;
-        button { width: 28px; height: 28px; border: 0; color: $primary-text-color; background: transparent; cursor: pointer; }
+        button {
+            width: 28px;
+            height: 28px;
+            display: inline-flex;
+            align-items: center;
+            justify-content: center;
+            border: 0;
+            color: $primary-text-color;
+            background: transparent;
+            cursor: pointer;
+            &:disabled { cursor: default; }
+            .common-loading { width: 16px; height: 16px; }
+        }
     }
 }
 .empty-state {
diff --git a/resources/assets/js/pages/manage/components/CollaborationSourceIcon.vue b/resources/assets/js/pages/manage/components/CollaborationSourceIcon.vue
new file mode 100644
index 000000000..db1e257e3
--- /dev/null
+++ b/resources/assets/js/pages/manage/components/CollaborationSourceIcon.vue
@@ -0,0 +1,34 @@
+<template>
+    <svg
+        width="18"
+        height="18"
+        viewBox="0 0 24 24"
+        fill="none"
+        xmlns="http://www.w3.org/2000/svg"
+        aria-hidden="true">
+        <path
+            d="M14 5H19V10"
+            stroke="currentColor"
+            stroke-width="1.8"
+            stroke-linecap="round"
+            stroke-linejoin="round"/>
+        <path
+            d="M19 5L11 13"
+            stroke="currentColor"
+            stroke-width="1.8"
+            stroke-linecap="round"
+            stroke-linejoin="round"/>
+        <path
+            d="M19 14V17A2 2 0 0 1 17 19H7A2 2 0 0 1 5 17V7A2 2 0 0 1 7 5H10"
+            stroke="currentColor"
+            stroke-width="1.8"
+            stroke-linecap="round"
+            stroke-linejoin="round"/>
+    </svg>
+</template>
+
+<script>
+export default {
+    name: "CollaborationSourceIcon",
+}
+</script>
diff --git a/resources/assets/js/pages/manage/components/DialogView/LocalFileStatusIcon.vue b/resources/assets/js/pages/manage/components/DialogView/LocalFileStatusIcon.vue
new file mode 100644
index 000000000..3af0bd66f
--- /dev/null
+++ b/resources/assets/js/pages/manage/components/DialogView/LocalFileStatusIcon.vue
@@ -0,0 +1,67 @@
+<template>
+    <span class="local-file-status-icon" aria-hidden="true">
+        <Loading v-if="status === 'downloading'"/>
+        <svg
+            v-else-if="status === 'available'"
+            width="18"
+            height="18"
+            viewBox="0 0 24 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg">
+            <path
+                d="M3.5 16V6A2 2 0 0 1 5.5 4H8.2A2 2 0 0 1 9.6 4.6L11 6H18.5A2 2 0 0 1 20.5 8V9"
+                stroke="currentColor"
+                stroke-width="1.8"
+                stroke-linecap="round"
+                stroke-linejoin="round"/>
+            <path
+                d="M5.2 19.5H17.7A2 2 0 0 0 19.6 18.1L21.2 12.8A1.5 1.5 0 0 0 19.8 10.8H8.3A2 2 0 0 0 6.4 12.2L3.6 17A1.7 1.7 0 0 0 5.2 19.5Z"
+                stroke="currentColor"
+                stroke-width="1.8"
+                stroke-linecap="round"
+                stroke-linejoin="round"/>
+        </svg>
+        <svg
+            v-else
+            width="18"
+            height="18"
+            viewBox="0 0 24 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg">
+            <path
+                d="M12 3V15M7.5 10.5L12 15L16.5 10.5M5 20H19"
+                stroke="currentColor"
+                stroke-width="1.8"
+                stroke-linecap="round"
+                stroke-linejoin="round"/>
+        </svg>
+    </span>
+</template>
+
+<script>
+export default {
+    name: "LocalFileStatusIcon",
+    props: {
+        status: {
+            type: String,
+            default: 'missing',
+        },
+    },
+}
+</script>
+
+<style lang="scss" scoped>
+.local-file-status-icon {
+    width: 18px;
+    height: 18px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    flex: none;
+
+    .common-loading {
+        width: 16px;
+        height: 16px;
+    }
+}
+</style>
diff --git a/resources/assets/js/pages/manage/components/DialogView/file.vue b/resources/assets/js/pages/manage/components/DialogView/file.vue
index e84faccb0..21020c5ef 100644
--- a/resources/assets/js/pages/manage/components/DialogView/file.vue
+++ b/resources/assets/js/pages/manage/components/DialogView/file.vue
@@ -16,7 +16,7 @@
             <div v-else class="file-box" @click="downFile">
                 <img class="file-thumb" :src="msg.thumb"/>
                 <div class="file-info">
-                    <div class="file-name">{{ msg.name }}</div>
+                    <div class="file-name" :title="msg.name">{{ msg.name }}</div>
                     <div class="file-size">{{ $A.bytesToSize(msg.size) }}</div>
                 </div>
                 <button
@@ -27,9 +27,7 @@
                     :aria-label="localActionTitle"
                     :disabled="localFileStatus === 'downloading'"
                     @click.stop="handleLocalAction">
-                    <Loading v-if="localFileStatus === 'downloading'"/>
-                    <Icon v-else-if="localFileStatus === 'available'" type="ios-folder-open-outline"/>
-                    <Icon v-else type="md-download"/>
+                    <LocalFileStatusIcon :status="localFileStatus"/>
                 </button>
             </div>
             <div v-if="msg.percentage" class="file-percentage">
@@ -40,7 +38,10 @@
 </template>
 
 <script>
+import LocalFileStatusIcon from "./LocalFileStatusIcon.vue";
+
 export default {
+    components: {LocalFileStatusIcon},
     props: {
         msgId: {
             type: [Number, String],