fix: first page default mode (#2719)

Co-authored-by: tzhangchi <c@affine.pro>

apps/web/src/layouts/workspace-layout.tsx

@@ -301,7 +301,7 @@ export const WorkspaceLayoutInner: FC<PropsWithChildren> = ({ children }) => {
   //#region init workspace
   if (currentWorkspace.blockSuiteWorkspace.isEmpty) {
     // this is a new workspace, so we should redirect to the new page
-    const pageId = nanoid();
+    const pageId = DEFAULT_HELLO_WORLD_PAGE_ID;
     const page = currentWorkspace.blockSuiteWorkspace.createPage({
       id: pageId,
     });