fix(web): use dashboard icon for workspace entry

apps/web_v1/src/App.css

@@ -126,12 +126,6 @@
   border-radius: 12px;
 }
 
-.rail-brand-icon {
-  width: 40px;
-  height: 40px;
-  border-radius: 10px;
-}
-
 .brand-name {
   font-size: 18px;
   font-weight: 700;

apps/web_v1/src/pages/projects/project-rail.tsx

@@ -1,6 +1,6 @@
 import type { CSSProperties } from 'react'
 import { Badge, Button, Layout, Space } from '@arco-design/web-react'
-import { IconCompass, IconPlus } from '@arco-design/web-react/icon'
+import { IconCompass, IconDashboard, IconPlus } from '@arco-design/web-react/icon'
 import type { Project, WorkbenchView } from './project-types'
 
 const { Sider } = Layout
@@ -26,10 +26,10 @@ export function ProjectRail({
     <Sider className="project-rail" width={96}>
       <Button
         className={activeView === 'workspace' ? 'dashboard-button active' : 'dashboard-button'}
-        icon={<img className="brand-icon rail-brand-icon" src="/senlinai-icon.svg" alt="" aria-hidden="true" />}
+        icon={<IconDashboard />}
         onClick={onSelectWorkspace}
-        aria-label="森林AI 工作台"
-        title="森林AI 工作台"
+        aria-label="工作台"
+        title="工作台"
       />
       <Button
         className={activeView === 'workspace-explore' ? 'dashboard-button active' : 'dashboard-button'}