diff --git a/backend/package/yuxi/agents/toolkits/buildin/install_skill.py b/backend/package/yuxi/agents/toolkits/buildin/install_skill.py
index 18306409..60aebe61 100644
--- a/backend/package/yuxi/agents/toolkits/buildin/install_skill.py
+++ b/backend/package/yuxi/agents/toolkits/buildin/install_skill.py
@@ -16,7 +16,6 @@ from yuxi.repositories.user_repository import UserRepository
 from yuxi.storage.postgres.manager import pg_manager
 from yuxi.utils.logging_config import logger
 
-
 ADMIN_ROLES = {"admin", "superadmin"}
 SANDBOX_PATH_HINT = (
     "请使用 /home/gem/user-data/workspace/...、/home/gem/user-data/uploads/... 或 /home/gem/user-data/outputs/..."
diff --git a/backend/package/yuxi/services/conversation_service.py b/backend/package/yuxi/services/conversation_service.py
index b24c16b9..8cf7c928 100644
--- a/backend/package/yuxi/services/conversation_service.py
+++ b/backend/package/yuxi/services/conversation_service.py
@@ -12,6 +12,7 @@ from yuxi.agents.buildin import agent_manager
 from yuxi.config import config as app_config
 from yuxi.plugins.parser import Parser
 from yuxi.repositories.conversation_repository import ConversationRepository
+from yuxi.services.mention_search_service import invalidate_mention_cache
 from yuxi.services.upload_utils import write_upload_to_path
 from yuxi.utils.datetime_utils import utc_isoformat
 from yuxi.utils.logging_config import logger
@@ -410,6 +411,8 @@ async def upload_thread_attachment_view(
         attachments=all_attachments,
     )
 
+    await invalidate_mention_cache(thread_id)
+
     return serialize_attachment(attachment_record)
 
 
@@ -474,6 +477,8 @@ async def delete_thread_attachment_view(
         attachments=all_attachments,
     )
 
+    await invalidate_mention_cache(thread_id)
+
     return {"message": "附件已删除"}
 
 
diff --git a/backend/package/yuxi/services/thread_files_service.py b/backend/package/yuxi/services/thread_files_service.py
index 44435b95..bb6cad44 100644
--- a/backend/package/yuxi/services/thread_files_service.py
+++ b/backend/package/yuxi/services/thread_files_service.py
@@ -17,6 +17,7 @@ from yuxi.agents.backends.sandbox import (
 )
 from yuxi.repositories.conversation_repository import ConversationRepository
 from yuxi.services.conversation_service import require_user_conversation
+from yuxi.services.mention_search_service import invalidate_mention_cache
 from yuxi.utils.datetime_utils import utc_isoformat_from_timestamp
 
 
@@ -255,6 +256,8 @@ async def save_thread_artifact_to_workspace_view(
     with source_path.open("rb") as src, target_path.open("wb") as dst:
         shutil.copyfileobj(src, dst)
 
+    await invalidate_mention_cache(thread_id)
+
     saved_virtual_path = virtual_path_for_thread_file(thread_id, target_path, user_id=user_id)
     return {
         "name": target_path.name,
diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index b6b64db2..2c78e1ca 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -431,7 +431,6 @@ const currentTodos = computed(() => {
   return Array.isArray(todos) ? todos : []
 })
 
-
 const { mentionConfig } = useAgentMentionConfig({
   currentAgentState,
   currentThreadAttachments,
diff --git a/web/src/components/AgentPanel.vue b/web/src/components/AgentPanel.vue
index bff2c9b3..fedeac30 100644
--- a/web/src/components/AgentPanel.vue
+++ b/web/src/components/AgentPanel.vue
@@ -321,7 +321,9 @@ const refreshFileSystem = async () => {
         (entry) => entry?.is_dir && entry.name === DISPLAY_ROOT_DIRECTORY_NAME
       )
 
-      dynamicTreeData.value = displayRootEntry ? await loadDirectoryChildren(displayRootEntry.path) : []
+      dynamicTreeData.value = displayRootEntry
+        ? await loadDirectoryChildren(displayRootEntry.path)
+        : []
       expandedKeys.value = []
       selectedKeys.value = []
     } else {
diff --git a/web/src/components/MessageInputComponent.vue b/web/src/components/MessageInputComponent.vue
index dd551283..07c2a4e6 100644
--- a/web/src/components/MessageInputComponent.vue
+++ b/web/src/components/MessageInputComponent.vue
@@ -39,11 +39,7 @@
     />
 
     <!-- @ 提及选择弹窗 -->
-    <div
-      v-if="mentionPopupVisible"
-      ref="mentionDropdownRef"
-      class="mention-dropdown-wrapper"
-    >
+    <div v-if="mentionPopupVisible" ref="mentionDropdownRef" class="mention-dropdown-wrapper">
       <div class="mention-popup">
         <!-- 文件列表 -->
         <div v-if="mentionItems.files.length > 0 || showFileSearchPrompt" class="mention-group">
@@ -259,15 +255,7 @@ const slots = useSlots()
 
 // @ 提及功能是否启用
 const mentionEnabled = computed(() => {
-  if (!props.mention) return false
-  const { files, knowledgeBases, mcps, skills, subagents } = props.mention
-  return (
-    (Array.isArray(files) && files.length > 0) ||
-    (Array.isArray(knowledgeBases) && knowledgeBases.length > 0) ||
-    (Array.isArray(mcps) && mcps.length > 0) ||
-    (Array.isArray(skills) && skills.length > 0) ||
-    (Array.isArray(subagents) && subagents.length > 0)
-  )
+  return !!props.mention
 })
 
 const mentionTypePrefixMap = {
@@ -539,7 +527,6 @@ const hasAnyItems = computed(() => {
   )
 })
 
-
 const insertMention = (item) => {
   if (!inputRef.value) return
 
@@ -1000,7 +987,9 @@ defineExpose({
   overflow-y: auto;
   background: var(--gray-0);
   border-radius: 8px;
-  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.12);
+  box-shadow:
+    0 -4px 16px rgba(0, 0, 0, 0.08),
+    0 4px 16px rgba(0, 0, 0, 0.12);
   border: 1px solid var(--gray-200);
 
   .mention-group {
diff --git a/web/src/composables/useAgentMentionConfig.js b/web/src/composables/useAgentMentionConfig.js
index 6f347dce..71042c82 100644
--- a/web/src/composables/useAgentMentionConfig.js
+++ b/web/src/composables/useAgentMentionConfig.js
@@ -127,15 +127,6 @@ export function useAgentMentionConfig({
           }
       )
 
-    if (
-      !files.length &&
-      !knowledgeBases.length &&
-      !mcps.length &&
-      !skills.length &&
-      !subagents.length
-    )
-      return null
-
     return {
       files,
       knowledgeBases,