feed: fix expand long notes

Text notes longer than 280 are shortened and appended with '…' to
indicate that this note can be expanded, but this dotdotdot was
real text and was not removed once the note is expanded.

Changed to showing the dots through CSS and only if the attribute
exists, so it does not show on expanded notes.

src/cards.css

@@ -110,3 +110,8 @@
   top: -100vh;
   width: .4rem;
 }
+
+[data-append]::after {
+  color: var(--color-accent);
+  content: "…";
+}

src/main.js

@@ -169,7 +169,7 @@ const elemCanvas = (text) => {
 function createTextNote(evt, relay) {
   const {host, img, isReply, name, replies, time, userName} = getMetadata(evt, relay);
   const isLongContent = evt.content.trimRight().length > 280;
-  const content = isLongContent ? `${evt.content.slice(0, 280)}…` : evt.content;
+  const content = isLongContent ? evt.content.slice(0, 280) : evt.content;
   const hasReactions = reactionMap[evt.id]?.length > 0;
   const didReact = hasReactions && !!reactionMap[evt.id].find(reaction => reaction.pubkey === pubkey);
   const replyFeed = replies[0] ? replies.map(e => replyDomMap[e.id] = createTextNote(e, relay)) : [];
@@ -604,10 +604,10 @@ privateKeyInput.value = localStorage.getItem('private_key');
 pubKeyInput.value = localStorage.getItem('pub_key');
 
 document.body.addEventListener('click', (e) => {
-  const append = e.target.closest('[data-append]');
-  if (append) {
-    append.textContent += append.dataset.append;
-    delete append.dataset.append;
+  const container = e.target.closest('[data-append]');
+  if (container) {
+    container.append(...multilineText(container.dataset.append));
+    delete container.dataset.append;
     return;
   }
   const back = e.target.closest('[name="back"]')