diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 95630a0..bfb29f3 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     = '528'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '530'; // ← 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 106b7c5..61ba198 100644
--- a/backend/static/js/pages/admin.js
+++ b/backend/static/js/pages/admin.js
@@ -2000,9 +2000,10 @@ window.Page_admin = (() => {
           is_founder: isFounder,
           is_partner: isPartner,
         });
+        if (!result) throw new Error('Keine Antwort vom Server.');
         UI.toast.success(`Status für ${result.name} gesetzt.`);
         grantResult.innerHTML = `<p style="font-size:var(--text-xs);color:var(--c-success,#16a34a)">✓ Gründer: ${result.is_founder ? 'Ja' : 'Nein'} | Partner: ${result.is_partner ? 'Ja' : 'Nein'}</p>`;
-      });
+      }).catch(e => UI.toast.error(e.message || 'Fehler beim Speichern.'));
     });
   }
 
diff --git a/backend/static/js/pages/gruender.js b/backend/static/js/pages/gruender.js
index e82fc3e..100891e 100644
--- a/backend/static/js/pages/gruender.js
+++ b/backend/static/js/pages/gruender.js
@@ -39,7 +39,7 @@ window.Page_gruender = (() => {
   async function _load() {
     const el = _container.querySelector('#grnd-content');
     try {
-      const d = await API.get('/api/partner/founders/stats');
+      const d = await API.get('/partner/founders/stats');
       if (!d || typeof d.total === 'undefined') throw new Error('Ungültige Antwort vom Server.');
       el.innerHTML = _renderStats(d);
     } catch (e) {
diff --git a/backend/static/js/pages/settings.js b/backend/static/js/pages/settings.js
index 7c5c80e..941cf3f 100644
--- a/backend/static/js/pages/settings.js
+++ b/backend/static/js/pages/settings.js
@@ -1450,7 +1450,7 @@ window.Page_settings = (() => {
         if (code.length < 3) return;
         _debounce = setTimeout(async () => {
           try {
-            const info = await API.get(`/api/partner/codes/${encodeURIComponent(code)}/info`);
+            const info = await API.get(`/partner/codes/${encodeURIComponent(code)}/info`);
             if (info.redeemable) {
               partnerHint.textContent = info.grants_founder
                 ? `✓ Gültiger Code von "${info.label}" — du erhältst eine lebenslange Gründer-Lizenz!`
diff --git a/backend/static/sw.js b/backend/static/sw.js
index fe10589..97d2020 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-v551';
+const CACHE_VERSION = 'by-v553';
 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