refactor(ChatNavbar): add new topic button with tooltip and adjust sidebar styles for improved visibility

src/renderer/src/pages/home/ChatNavbar.tsx

@@ -10,11 +10,12 @@ import { modelGenerating } from '@renderer/hooks/useRuntime'
 import { useSettings } from '@renderer/hooks/useSettings'
 import { useShortcut } from '@renderer/hooks/useShortcuts'
 import { useShowAssistants } from '@renderer/hooks/useStore'
+import { EVENT_NAMES, EventEmitter } from '@renderer/services/EventService'
 import { useAppDispatch } from '@renderer/store'
 import { setNarrowMode } from '@renderer/store/settings'
 import { Tooltip } from 'antd'
 import { t } from 'i18next'
-import { LayoutGrid, PanelLeft, PanelRight, Search } from 'lucide-react'
+import { LayoutGrid, MessageSquareDiff, PanelLeft, PanelRight, Search } from 'lucide-react'
 import { FC } from 'react'
 import { useNavigate } from 'react-router'
 import styled from 'styled-components'
@@ -42,6 +43,11 @@ const ChatNavbar: FC = () => {
     <Navbar className="home-navbar">
       <NavbarContainer $isFullscreen={isFullscreen} $showSidebar={showAssistants} className="home-navbar-right">
         <HStack alignItems="center">
+          <Tooltip title={t('settings.shortcuts.new_topic')} mouseEnterDelay={0.8}>
+            <NavbarIcon onClick={() => EventEmitter.emit(EVENT_NAMES.ADD_NEW_TOPIC)} style={{ marginRight: 5 }}>
+              <MessageSquareDiff size={18} />
+            </NavbarIcon>
+          </Tooltip>
           <NavbarIcon
             onClick={() => toggleShowAssistants()}
             style={{ marginRight: 8, marginLeft: isMac && !isFullscreen ? 4 : -12 }}>
@@ -85,11 +91,12 @@ const NavbarContainer = styled.div<{ $isFullscreen: boolean; $showSidebar: boole
   max-height: var(--navbar-height);
   min-height: var(--navbar-height);
   justify-content: space-between;
-  padding-left: ${({ $showSidebar }) => (isMac ? ($showSidebar ? '10px' : '75px') : '25px')};
+  margin-left: ${({ $showSidebar }) => ($showSidebar ? '-37px' : isMac ? '75px' : '10px')};
   font-weight: bold;
   color: var(--color-text-1);
   padding-right: ${({ $isFullscreen }) => ($isFullscreen ? '12px' : isWindows ? '140px' : isLinux ? '120px' : '12px')};
   -webkit-app-region: drag;
+  transition: margin-left 0.3s;
 `
 
 export const NavbarIcon = styled.div`

src/renderer/src/pages/home/MainSidebar/MainNavbar.tsx

@@ -1,9 +1,8 @@
 import SearchPopup from '@renderer/components/Popups/SearchPopup'
 import { isMac } from '@renderer/config/constant'
-import { EVENT_NAMES, EventEmitter } from '@renderer/services/EventService'
 import { Tooltip } from 'antd'
 import { t } from 'i18next'
-import { MessageSquareDiff, Search } from 'lucide-react'
+import { Search } from 'lucide-react'
 import { FC } from 'react'
 import styled from 'styled-components'
 
@@ -21,11 +20,6 @@ const HeaderNavbar: FC<Props> = () => {
           </Tooltip>
         )}
       </div>
-      <Tooltip title={t('settings.shortcuts.new_topic')} mouseEnterDelay={0.8}>
-        <NavbarIcon onClick={() => EventEmitter.emit(EVENT_NAMES.ADD_NEW_TOPIC)} style={{ marginRight: 5 }}>
-          <MessageSquareDiff size={18} />
-        </NavbarIcon>
-      </Tooltip>
     </Container>
   )
 }

src/renderer/src/pages/home/MainSidebar/MainSidebar.tsx

@@ -129,12 +129,14 @@ const MainSidebar: FC = () => {
 
   const isRoutes = (path: string): boolean => pathname.startsWith(path)
 
-  if (!showAssistants) {
-    return null
-  }
-
   return (
-    <Container id="main-sidebar">
+    <Container
+      id="main-sidebar"
+      style={{
+        width: showAssistants ? 'var(--assistants-width)' : '0px',
+        opacity: showAssistants ? 1 : 0,
+        overflow: showAssistants ? 'initial' : 'hidden'
+      }}>
       <MainNavbar />
       <MainMenu>
         <MainMenuItem active={isAppMenuExpanded} onClick={() => setIsAppMenuExpanded(!isAppMenuExpanded)}>

src/renderer/src/pages/home/MainSidebar/MainSidebarStyles.tsx

@@ -48,10 +48,11 @@ export const MainMenuItemText = styled.div`
 export const Container = styled.div`
   display: flex;
   flex-direction: column;
-  width: var(--assistant-width);
-  max-width: var(--assistant-width);
+  width: var(--assistants-width);
+  max-width: var(--assistants-width);
   border-right: 0.5px solid var(--color-border);
   height: 100vh;
+  transition: all 0.3s;
 `
 
 export const MainMenu = styled.div`