Fix stuttering list view

vue/src/composables/useFeeds.js

@@ -221,7 +221,16 @@ async function handleIntersection(entries, topbarHeight = 0) {
 
   const readIds = new Set(readFeeds.map(feed => feed.id))
   feeds.value = feeds.value.filter(feed => !readIds.has(feed.id))
-  document.getElementById(0)?.scrollIntoView()
+  // Removing .observe nodes that have already scrolled above the viewport
+  // shrinks the document above the current scroll position — native CSS
+  // scroll anchoring (on by default, no overflow-anchor override here)
+  // compensates for that automatically by keeping the visually-anchored
+  // node in place. Do NOT add a scrollIntoView()/scrollTo() here: an
+  // earlier version called `document.getElementById(0)?.scrollIntoView()`
+  // to fix a past scroll-jump complaint, but by the time several articles
+  // have been read, id "0" is an already-read element far above the
+  // viewport — forcing a jump to it fights scroll anchoring and is exactly
+  // the stutter being fixed now.
 }
 
 function setInitialLoad(value) {