Productivity features, UI translations, local email translation

- Snooze (with a Snoozed folder), keyboard shortcuts with a Settings
  section, mail templates (Compose > More > Templates), a Subscriptions
  folder with bulk unsubscribe/delete, and tracker blocking with a
  Privacy toggle (on by default)
- Own dialogs instead of browser popups; emoji picker in compose; compose
  windows survive a visit to Settings
- Sentence completion learned from the user's sent mail (no AI)
- Interface in English and Polish (one file per language, English as the
  fallback), picked from the browser on first run, then kept
- Email translation on the server via LibreTranslate: Translate button
  and "Translate to...", messages in several languages translated part
  by part, names/addresses/emoji/file names/phone numbers kept, an
  animated line while translating
- Antispam "Mark as spam" loads with the message, not when the menu opens

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

plugins/webmail_plugin_antispam/webmail_plugin_antispam/ui/menu.js

@@ -15,15 +15,22 @@ export default function mount(el, ctx, props) {
   const messageId = props && props.messageId;
   if (!messageId) return;
   let disposed = false;
+  let generation = 0;
 
-  (async () => {
+  // The host mounts this with the message (hidden in a closed menu), not when
+  // the menu opens, so the item is ready by then. It loads again after a
+  // lesson, so a reopened menu shows the new state without a wait.
+  const load = async () => {
+    const mine = ++generation;
     let data = null;
     try {
       data = await ctx.api.pluginFetch(`/context/${messageId}`);
     } catch {
       return; // no antispam service, no menu item
     }
-    if (disposed || !data) return;
+    if (disposed || mine !== generation) return;
+    el.innerHTML = "";
+    if (!data) return;
 
     // The folder decides which action is on offer — FIRST. A message sitting in
     // the spam folder offers "not spam" no matter what it was taught, because
@@ -52,10 +59,15 @@ export default function mount(el, ctx, props) {
         /* the menu is closing regardless; nothing useful to show here */
       }
     });
-  })();
+  };
+
+  const onLearned = () => void load();
+  window.addEventListener("webmail:antispam-learned", onLearned);
+  void load();
 
   return () => {
     disposed = true;
+    window.removeEventListener("webmail:antispam-learned", onLearned);
     el.innerHTML = "";
   };
 }