add docs

lib/pages/home_tab.dart

@@ -17,6 +17,8 @@ import '../widgets/post_list_options.dart';
 import 'add_account.dart';
 import 'inbox.dart';
 
+/// First thing users sees when opening the app
+/// Shows list of posts from all or just specific instances
 class HomeTab extends HookWidget {
   @override
   Widget build(BuildContext context) {
@@ -200,6 +202,7 @@ class HomeTab extends HookWidget {
   }
 }
 
+/// Infinite list of posts
 class InfiniteHomeList extends HookWidget {
   final Function onStyleChange;
   final InfiniteScrollController controller;

lib/util/cleanup_url.dart

@@ -1,3 +1,4 @@
+/// Strips protocol, 'www.', and trailing '/' from [url] aka. cleans it up
 String cleanUpUrl(String url) {
   if (url.startsWith('https://')) {
     url = url.substring(8);