Toolbar-Button Fix, QuickMove-Tab, Schlagwörter-Sync, Abteilungsverwaltung

- Toolbar-Button öffnet Settings via browserAction.onClicked statt defektem Popup
- Button-Label "Vorlagen & Signaturen" statt Icon
- Tab "Erledigt" → "QuickMove" umbenannt
- QuickMove: E-Mails markieren + in Zielordner verschieben
- Schlagwörter-Sync aus Gitea (_config/schlagwoerter.json)
- Abteilungen anlegen (+Button)
- attachSignature-Fix entfernt
- message_display_action für QuickMove-Button

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

message_popup.js

@@ -0,0 +1,21 @@
+(async () => {
+  const result = await browser.storage.local.get('erledigt_config');
+  const actions = (result.erledigt_config || {}).actions || [];
+  const list = document.getElementById('action-list');
+
+  if (actions.length === 0) {
+    list.innerHTML = '<div class="empty-state">Keine Aktionen konfiguriert.</div>';
+    return;
+  }
+
+  for (let i = 0; i < actions.length; i++) {
+    const action = actions[i];
+    const btn = document.createElement('button');
+    btn.textContent = action.name || `Aktion ${i + 1}`;
+    btn.addEventListener('click', async () => {
+      await browser.runtime.sendMessage({ action: 'erledigtAction', index: i });
+      window.close();
+    });
+    list.appendChild(btn);
+  }
+})();