diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 7e74666..9f3c06c 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -3,7 +3,7 @@
    Router, State-Management, Navigation, Initialisierung.
    ============================================================ */
 
-const APP_VER     = '525'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '526'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.1.1'; // ← semantische Version, wird bei make release gesetzt
 const IS_STAGING  = location.hostname === 'staging.banyaro.app';
 
diff --git a/backend/static/js/pages/admin.js b/backend/static/js/pages/admin.js
index 77c8d47..1ca20a0 100644
--- a/backend/static/js/pages/admin.js
+++ b/backend/static/js/pages/admin.js
@@ -1958,11 +1958,11 @@ window.Page_admin = (() => {
       clearTimeout(_searchTimeout);
       _grantUserId = null;
       const q = searchInput.value.trim();
-      if (q.length < 2) { grantResult.innerHTML = ''; return; }
+      if (q.length < 1) { grantResult.innerHTML = ''; return; }
       _searchTimeout = setTimeout(async () => {
         try {
           const users = await API.get(`/api/admin/users/search?q=${encodeURIComponent(q)}`);
-          if (!users.length) {
+          if (!users || !users.length) {
             grantResult.innerHTML = `<p style="font-size:var(--text-xs);color:var(--c-text-muted)">Kein User gefunden.</p>`;
             return;
           }
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 468b430..5c299ca 100644
--- a/backend/static/sw.js
+++ b/backend/static/sw.js
@@ -3,7 +3,7 @@
    Offline-Cache + Push Notifications + Tile-Cache
    ============================================================ */
 
-const CACHE_VERSION = 'by-v548';
+const CACHE_VERSION = 'by-v549';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten
 const CACHE_API     = 'ban-yaro-api-v1';    // API-Response-Cache