On the Unread tab, a swipe back goes to the item just read (#50)

selectEntry took each read item out of the list the moment you moved on
from it, so the item was not there for the back swipe (or k) to reach: it
went to the one before, or to the list if the item had been first.

Items read while turning from one to the next (a swipe, j and k) now stay
in the list until the reader closes or another item is picked from the
list, and a background refresh keeps them as it keeps the open one.
Picking a row still drops the item left behind at once, as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/player.ts

@@ -141,7 +141,7 @@ function stepEntry(by){
   if(VIEWS[S.feed]?.url||!S.entries.length) return;
   const i=S.entries.findIndex(x=>x.guid===S.sel);
   const e=S.entries[i<0?0:Math.min(S.entries.length-1,Math.max(0,i+by))];
-  selectEntry(e);
+  selectEntry(e,true);
   $(`#eps .ep[data-guid="${CSS.escape(e.guid)}"]`)?.scrollIntoView({block:'nearest'});
 }
 function stepFeed(by){