style:1.只在项目首页展示更新日志

frontend/src/App.tsx

@@ -23,7 +23,6 @@ import Login from './pages/Login';
 import AuthCallback from './pages/AuthCallback';
 import ProtectedRoute from './components/ProtectedRoute';
 import AppFooter from './components/AppFooter';
-import ChangelogFloatingButton from './components/ChangelogFloatingButton';
 import './App.css';
 
 function App() {
@@ -61,7 +60,6 @@ function App() {
             {/* <Route path="polish" element={<Polish />} /> */}
           </Route>
         </Routes>
-        <ChangelogFloatingButton />
       </BrowserRouter>
     </ConfigProvider>
   );

frontend/src/pages/ProjectList.tsx

@@ -8,6 +8,7 @@ import { useProjectSync } from '../store/hooks';
 import type { ReactNode } from 'react';
 import { cardStyles, cardHoverHandlers, gridConfig } from '../components/CardStyles';
 import UserMenu from '../components/UserMenu';
+import ChangelogFloatingButton from '../components/ChangelogFloatingButton';
 
 const { Title, Text, Paragraph } = Typography;
 
@@ -1232,6 +1233,7 @@ export default function ProjectList() {
         </Form>
       </Modal>
 
+      <ChangelogFloatingButton />
     </div>
   );
 }