diff --git a/docs/develop-guides/roadmap.md b/docs/develop-guides/roadmap.md
index 7ea0a5a5..20b98b1a 100644
--- a/docs/develop-guides/roadmap.md
+++ b/docs/develop-guides/roadmap.md
@@ -36,6 +36,7 @@
 <!-- 0.6.1 的内容请放在这里 -->
 - 调整 backend Python 工作区依赖边界：将 `backend/package/yuxi` 明确为承载核心运行依赖的业务包，根 `backend/pyproject.toml` 仅保留工作区入口与开发/测试配置，减少依赖职责混淆。
 - 修复沙盒 `workspace` 隔离粒度：宿主机目录从共享 `saves/threads/shared/workspace` 收敛为用户级 `saves/threads/shared/<user_id>/workspace`，并同步传递 `user_id` 到 sandbox 路径解析、provisioner 挂载与 viewer/chat 测试，保证同用户跨线程共享、不同用户隔离。
+- 调整输入框 `@` 提及中的文件搜索交互：无查询内容时不再直接展示文件列表，改为提示“输入相关内容以搜索文件”，避免未过滤结果干扰选择。
 
 
 历史版本发布记录已迁移到 [版本变更记录](./changelog.md)。
diff --git a/web/src/components/MessageInputComponent.vue b/web/src/components/MessageInputComponent.vue
index 542287ca..7bc15c7d 100644
--- a/web/src/components/MessageInputComponent.vue
+++ b/web/src/components/MessageInputComponent.vue
@@ -46,16 +46,21 @@
     >
       <div class="mention-popup">
         <!-- 文件列表 -->
-        <div v-if="mentionItems.files.length > 0" class="mention-group">
+        <div v-if="mentionItems.files.length > 0 || showFileSearchPrompt" class="mention-group">
           <div class="mention-group-title">文件</div>
-          <div
-            v-for="(item, index) in mentionItems.files"
-            :key="'file-' + item.value"
-            :class="['mention-item', { active: isItemSelected('file', index) }]"
-            @click="insertMention(item)"
-          >
-            {{ item.label }}
+          <div v-if="showFileSearchPrompt" class="mention-search-placeholder">
+            输入相关内容以搜索文件
           </div>
+          <template v-else>
+            <div
+              v-for="(item, index) in mentionItems.files"
+              :key="'file-' + item.value"
+              :class="['mention-item', { active: isItemSelected('file', index) }]"
+              @click="insertMention(item)"
+            >
+              {{ item.label }}
+            </div>
+          </template>
         </div>
 
         <!-- 知识库列表 -->
@@ -252,7 +257,6 @@ const updateMentionItems = (query = '') => {
 
   const lowerQuery = query.toLowerCase()
   const { files = [], knowledgeBases = [], mcps = [], skills = [], subagents = [] } = props.mention
-  const workspacePrefix = '/home/gem/user-data/workspace/'
 
   const filterItems = (list) =>
     list.filter((item) => {
@@ -273,7 +277,7 @@ const updateMentionItems = (query = '') => {
 
   const filterFileItems = (list) => {
     if (!query) {
-      return list.filter((item) => !String(item.value || '').startsWith(workspacePrefix))
+      return []
     }
     return filterItems(list)
   }
@@ -372,9 +376,14 @@ const isItemSelected = (type, index) => {
 }
 
 // 是否有任何候选项
+const showFileSearchPrompt = computed(() => {
+  return Boolean(props.mention?.files?.length) && !mentionQuery.value
+})
+
 const hasAnyItems = computed(() => {
   const items = mentionItems.value
   return (
+    showFileSearchPrompt.value ||
     items.files.length > 0 ||
     items.knowledgeBases.length > 0 ||
     items.mcps.length > 0 ||
@@ -883,5 +892,11 @@ defineExpose({
     color: var(--gray-400);
     font-size: 13px;
   }
+
+  .mention-search-placeholder {
+    padding: 4px 8px;
+    color: var(--gray-400);
+    font-size: 13px;
+  }
 }
 </style>