diff --git a/src/renderer/src/hooks/agents/useCreateDefaultSession.ts b/src/renderer/src/hooks/agents/useCreateDefaultSession.ts
new file mode 100644
index 0000000000..d2af4dcda0
--- /dev/null
+++ b/src/renderer/src/hooks/agents/useCreateDefaultSession.ts
@@ -0,0 +1,49 @@
+import { useAgent } from '@renderer/hooks/agents/useAgent'
+import { useSessions } from '@renderer/hooks/agents/useSessions'
+import { useAppDispatch } from '@renderer/store'
+import { setActiveSessionIdAction, setActiveTopicOrSessionAction } from '@renderer/store/runtime'
+import type { CreateSessionForm } from '@renderer/types'
+import { useCallback, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+
+/**
+ * Returns a stable callback that creates a default agent session and updates UI state.
+ */
+export const useCreateDefaultSession = (agentId: string | null) => {
+  const { agent } = useAgent(agentId)
+  const { createSession } = useSessions(agentId)
+  const dispatch = useAppDispatch()
+  const { t } = useTranslation()
+  const [creatingSession, setCreatingSession] = useState(false)
+
+  const createDefaultSession = useCallback(async () => {
+    if (!agentId || !agent || creatingSession) {
+      return null
+    }
+
+    setCreatingSession(true)
+    try {
+      const session = {
+        ...agent,
+        id: undefined,
+        name: t('common.unnamed')
+      } satisfies CreateSessionForm
+
+      const created = await createSession(session)
+
+      if (created) {
+        dispatch(setActiveSessionIdAction({ agentId, sessionId: created.id }))
+        dispatch(setActiveTopicOrSessionAction('session'))
+      }
+
+      return created
+    } finally {
+      setCreatingSession(false)
+    }
+  }, [agentId, agent, createSession, creatingSession, dispatch, t])
+
+  return {
+    createDefaultSession,
+    creatingSession
+  }
+}
diff --git a/src/renderer/src/pages/home/Chat.tsx b/src/renderer/src/pages/home/Chat.tsx
index 0c2d76a6e6..c90d21c8ce 100644
--- a/src/renderer/src/pages/home/Chat.tsx
+++ b/src/renderer/src/pages/home/Chat.tsx
@@ -5,6 +5,7 @@ import { HStack } from '@renderer/components/Layout'
 import MultiSelectActionPopup from '@renderer/components/Popups/MultiSelectionPopup'
 import PromptPopup from '@renderer/components/Popups/PromptPopup'
 import { QuickPanelProvider } from '@renderer/components/QuickPanel'
+import { useCreateDefaultSession } from '@renderer/hooks/agents/useCreateDefaultSession'
 import { useAssistant } from '@renderer/hooks/useAssistant'
 import { useChatContext } from '@renderer/hooks/useChatContext'
 import { useRuntime } from '@renderer/hooks/useRuntime'
@@ -52,6 +53,8 @@ const Chat: FC<Props> = (props) => {
   const { activeTopicOrSession, activeAgentId, activeSessionIdMap } = chat
   const activeSessionId = activeAgentId ? activeSessionIdMap[activeAgentId] : null
   const { apiServer } = useSettings()
+  const sessionAgentId = activeTopicOrSession === 'session' ? activeAgentId : null
+  const { createDefaultSession } = useCreateDefaultSession(sessionAgentId)
 
   const mainRef = React.useRef<HTMLDivElement>(null)
   const contentSearchRef = React.useRef<ContentSearchRef>(null)
@@ -90,6 +93,21 @@ const Chat: FC<Props> = (props) => {
     }
   })
 
+  useShortcut(
+    'new_topic',
+    () => {
+      if (activeTopicOrSession !== 'session' || !activeAgentId) {
+        return
+      }
+      void createDefaultSession()
+    },
+    {
+      enabled: activeTopicOrSession === 'session',
+      preventDefault: true,
+      enableOnFormTags: true
+    }
+  )
+
   const contentSearchFilter: NodeFilter = {
     acceptNode(node) {
       const container = node.parentElement?.closest('.message-content-container')
diff --git a/src/renderer/src/pages/home/Inputbar/AgentSessionInputbar.tsx b/src/renderer/src/pages/home/Inputbar/AgentSessionInputbar.tsx
index 3c87462c6a..57497b6044 100644
--- a/src/renderer/src/pages/home/Inputbar/AgentSessionInputbar.tsx
+++ b/src/renderer/src/pages/home/Inputbar/AgentSessionInputbar.tsx
@@ -3,10 +3,12 @@ import { loggerService } from '@logger'
 import { ActionIconButton } from '@renderer/components/Buttons'
 import { QuickPanelView } from '@renderer/components/QuickPanel'
 import { useAgent } from '@renderer/hooks/agents/useAgent'
+import { useCreateDefaultSession } from '@renderer/hooks/agents/useCreateDefaultSession'
 import { useSession } from '@renderer/hooks/agents/useSession'
 import { selectNewTopicLoading } from '@renderer/hooks/useMessageOperations'
 import { getModel } from '@renderer/hooks/useModel'
 import { useSettings } from '@renderer/hooks/useSettings'
+import { useShortcutDisplay } from '@renderer/hooks/useShortcuts'
 import { useTimer } from '@renderer/hooks/useTimer'
 import PasteService from '@renderer/services/PasteService'
 import { pauseTrace } from '@renderer/services/SpanManagerService'
@@ -22,7 +24,7 @@ import { getSendMessageShortcutLabel, isSendMessageKeyPressed } from '@renderer/
 import { createMainTextBlock, createMessage } from '@renderer/utils/messageUtils/create'
 import TextArea, { TextAreaRef } from 'antd/es/input/TextArea'
 import { isEmpty } from 'lodash'
-import { CirclePause } from 'lucide-react'
+import { CirclePause, MessageSquareDiff } from 'lucide-react'
 import React, { CSSProperties, FC, useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import styled from 'styled-components'
@@ -46,6 +48,8 @@ const AgentSessionInputbar: FC<Props> = ({ agentId, sessionId }) => {
   const { session } = useSession(agentId, sessionId)
   const { agent } = useAgent(agentId)
   const { apiServer } = useSettings()
+  const { createDefaultSession, creatingSession } = useCreateDefaultSession(agentId)
+  const newTopicShortcut = useShortcutDisplay('new_topic')
 
   const { sendMessageShortcut, fontSize, enableSpellCheck } = useSettings()
   const textareaRef = useRef<TextAreaRef>(null)
@@ -87,6 +91,22 @@ const AgentSessionInputbar: FC<Props> = ({ agentId, sessionId }) => {
   }, [topicMessages])
 
   const canAbort = loading && streamingAskIds.length > 0
+  const createSessionDisabled = creatingSession || !apiServer.enabled
+
+  const handleCreateSession = useCallback(async () => {
+    if (createSessionDisabled) {
+      return
+    }
+
+    try {
+      const created = await createDefaultSession()
+      if (created) {
+        focusTextarea()
+      }
+    } catch (error) {
+      logger.warn('Failed to create agent session via toolbar:', error as Error)
+    }
+  }, [createDefaultSession, createSessionDisabled, focusTextarea])
 
   const handleKeyDown = (event: React.KeyboardEvent<HTMLTextAreaElement>) => {
     //to check if the SendMessage key is pressed
@@ -286,8 +306,18 @@ const AgentSessionInputbar: FC<Props> = ({ agentId, sessionId }) => {
             }}
             onBlur={() => setInputFocus(false)}
           />
-          <div className="flex justify-end px-1">
-            <div className="flex items-center gap-1">
+          <Toolbar>
+            <ToolbarGroup>
+              <Tooltip placement="top" content={t('chat.input.new_topic', { Command: newTopicShortcut })} delay={0}>
+                <ActionIconButton
+                  onClick={handleCreateSession}
+                  disabled={createSessionDisabled}
+                  loading={creatingSession}>
+                  <MessageSquareDiff size={19} />
+                </ActionIconButton>
+              </Tooltip>
+            </ToolbarGroup>
+            <ToolbarGroup>
               <SendMessageButton sendMessage={sendMessage} disabled={sendDisabled} />
               {canAbort && (
                 <Tooltip placement="top" content={t('chat.input.pause')}>
@@ -296,8 +326,8 @@ const AgentSessionInputbar: FC<Props> = ({ agentId, sessionId }) => {
                   </ActionIconButton>
                 </Tooltip>
               )}
-            </div>
-          </div>
+            </ToolbarGroup>
+          </Toolbar>
         </InputBarContainer>
       </Container>
     </NarrowLayout>
@@ -343,6 +373,25 @@ const InputBarContainer = styled.div`
   }
 `
 
+const Toolbar = styled.div`
+  display: flex;
+  flex-direction: row;
+  justify-content: space-between;
+  padding: 5px 8px;
+  height: 40px;
+  gap: 16px;
+  position: relative;
+  z-index: 2;
+  flex-shrink: 0;
+`
+
+const ToolbarGroup = styled.div`
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 6px;
+`
+
 const TextareaStyle: CSSProperties = {
   paddingLeft: 0,
   padding: '6px 15px 0px' // 减小顶部padding
diff --git a/src/renderer/src/pages/home/Tabs/components/Sessions.tsx b/src/renderer/src/pages/home/Tabs/components/Sessions.tsx
index 62b1df41de..5a36ce5d22 100644
--- a/src/renderer/src/pages/home/Tabs/components/Sessions.tsx
+++ b/src/renderer/src/pages/home/Tabs/components/Sessions.tsx
@@ -1,6 +1,6 @@
 import { Alert, Spinner } from '@heroui/react'
 import { DynamicVirtualList } from '@renderer/components/VirtualList'
-import { useAgent } from '@renderer/hooks/agents/useAgent'
+import { useCreateDefaultSession } from '@renderer/hooks/agents/useCreateDefaultSession'
 import { useSessions } from '@renderer/hooks/agents/useSessions'
 import { useRuntime } from '@renderer/hooks/useRuntime'
 import { useAppDispatch } from '@renderer/store'
@@ -10,7 +10,6 @@ import {
   setActiveTopicOrSessionAction,
   setSessionWaitingAction
 } from '@renderer/store/runtime'
-import { CreateSessionForm } from '@renderer/types'
 import { buildAgentSessionTopicId } from '@renderer/utils/agentSession'
 import { motion } from 'framer-motion'
 import { memo, useCallback, useEffect } from 'react'
@@ -27,11 +26,11 @@ interface SessionsProps {
 
 const Sessions: React.FC<SessionsProps> = ({ agentId }) => {
   const { t } = useTranslation()
-  const { agent } = useAgent(agentId)
-  const { sessions, isLoading, error, deleteSession, createSession } = useSessions(agentId)
+  const { sessions, isLoading, error, deleteSession } = useSessions(agentId)
   const { chat } = useRuntime()
   const { activeSessionIdMap } = chat
   const dispatch = useAppDispatch()
+  const { createDefaultSession, creatingSession } = useCreateDefaultSession(agentId)
 
   const setActiveSessionId = useCallback(
     (agentId: string, sessionId: string | null) => {
@@ -41,19 +40,6 @@ const Sessions: React.FC<SessionsProps> = ({ agentId }) => {
     [dispatch]
   )
 
-  const handleCreateSession = useCallback(async () => {
-    if (!agent) return
-    const session = {
-      ...agent,
-      id: undefined,
-      name: t('common.unnamed')
-    } satisfies CreateSessionForm
-    const created = await createSession(session)
-    if (created) {
-      dispatch(setActiveSessionIdAction({ agentId, sessionId: created.id }))
-    }
-  }, [agent, agentId, createSession, dispatch, t])
-
   const handleDeleteSession = useCallback(
     async (id: string) => {
       if (sessions.length === 1) {
@@ -110,7 +96,7 @@ const Sessions: React.FC<SessionsProps> = ({ agentId }) => {
 
   return (
     <div className="sessions-tab flex h-full w-full flex-col p-2">
-      <AddButton onPress={handleCreateSession} className="mb-2">
+      <AddButton onPress={createDefaultSession} className="mb-2" isDisabled={creatingSession}>
         {t('agent.session.add.title')}
       </AddButton>
       {/* h-9 */}