Signals' words: what matters out of the noise of your feeds (#254)

The dialog asks what to listen for, the page says what it picked out of the noise of your feeds,
and a new Signal says nothing has come through yet instead of showing an empty list.

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

web/src/items.ts

@@ -133,6 +133,8 @@ function renderEntries(){
   if(!S.entries.length){
     // Said only for a search, where the words typed are why; an empty feed or tab speaks for itself.
     if(S.q) box.innerHTML='<p class="empty">Nothing matches that search.</p>';
+    // A new Signal is empty while Jev reads, which would otherwise look broken.
+    else if(sg&&S.filter==='all') box.innerHTML='<p class="empty">Nothing has come through yet. Jev reads new items as your feeds are checked.</p>';
     return;
   }
   for(const e of S.entries) box.appendChild(epEl(e));