add: journal.css special note

crates/app/src/routes/pages/journals.rs

@@ -116,7 +116,7 @@ pub async fn view_request(
     }
 
     // if we don't have a selected journal, we shouldn't be here probably
-    if selected_journal.is_empty() {
+    if selected_journal.is_empty() | (selected_note == "journal.css") {
         return Err(Html(
             render_error(Error::NotAllowed, &jar, &data, &user).await,
         ));