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/dialogs.ts

@@ -444,9 +444,9 @@ async function prefsModal(){
       <div class="inline"><input type="password" id="stskey" autocomplete="off" spellcheck="false"
         placeholder="${S.me?.typesafe_key_set?'Saved. Paste a new one to replace it':'Paste your key'}">
         <button class="btn ico" id="stsforget" title="Forget the key" aria-label="Forget the key"${S.me?.typesafe_key_set?'':' hidden'}>${ICON.trash}</button></div>
-      <span class="hint">Signals are picked by TypeSafe's Jev on your own key, from
-      <a href="https://typesafe.ai" target="_blank" rel="noopener">typesafe.ai</a>. It is kept on this
-      server and never shown again.</span></div>
+      <span class="hint">Signals pick what matters out of everything you subscribe to, using TypeSafe's
+      Jev on your own key, from <a href="https://typesafe.ai" target="_blank" rel="noopener">typesafe.ai</a>.
+      The key is kept on this server and never shown again.</span></div>
     <div class="field boxed"><label for="tokname">API tokens</label>
       <div id="tokens"></div>
       <div class="inline"><input type="text" id="tokname" placeholder="What it is for">