Refactor console layout and sidebar components; implement user authentication and loading states

- Updated `RootLayout` to include user authentication logic and loading states.
- Removed redundant user authentication logic from `Page` component.
- Enhanced `AppSidebar` to fetch and display logged-in user information.
- Replaced `GravatarAvatar` with new `Avatar` component for user profile images.
- Added new pages for comment, file, post, and user management.
- Introduced utility functions for generating Gravatar URLs and fallback avatars based on usernames.
- Cleaned up unused imports and components across various files.

web/src/components/blog-home/blog-home.tsx

@@ -38,7 +38,7 @@ export default function BlogHome() {
   const [sortBy, setSortBy, isSortByLoaded] = useStoredState<SortBy>(QueryKey.SortBy, DEFAULT_SORTBY);
 
   useEffect(() => {
-    if (!isSortByLoaded) return; // wait for stored state loaded
+    if (!isSortByLoaded) return;
     setLoading(true);
     listPosts(
       {