feat(core): set the right sidebar to display TOC by default (#6503)

https://github.com/toeverything/AFFiNE/assets/102217452/e37ee798-0b22-4ad4-8bf7-ed32eafc89d0

packages/frontend/core/src/modules/multi-tab-sidebar/view/header-switcher.tsx

@@ -45,6 +45,7 @@ export const MultiTabSidebarHeaderSwitcher = ({
   useEffect(() => {
     const journalExtension = tabs.find(ext => ext.name === 'journal');
     isJournal && journalExtension && setActiveTabName('journal');
+    !isJournal && setActiveTabName('outline');
   }, [tabs, isJournal, setActiveTabName]);
 
   const vars = assignInlineVars({