diff --git a/backend/main.py b/backend/main.py
index 3bb5f90..35a8577 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -327,7 +327,7 @@ MEDIA_DIR = os.getenv("MEDIA_DIR", "/data/media")
 os.makedirs(MEDIA_DIR, exist_ok=True)
 app.mount("/media", StaticFiles(directory=MEDIA_DIR), name="media")
 
-APP_VER = "734"  # muss mit APP_VER in app.js übereinstimmen
+APP_VER = "735"  # muss mit APP_VER in app.js übereinstimmen
 
 @app.get("/api/version")
 async def app_version():
diff --git a/backend/static/index.html b/backend/static/index.html
index ffe279f..8fe4dfe 100644
--- a/backend/static/index.html
+++ b/backend/static/index.html
@@ -578,7 +578,7 @@
 <script src="/js/api.js?v=94"></script>
 <script src="/js/ui.js?v=94"></script>
 <script src="/js/app.js?v=94"></script>
-<script src="/js/worlds.js?v=734"></script>
+<script src="/js/worlds.js?v=735"></script>
 
 <!-- Feature-Seiten werden lazy geladen -->
 
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 7aebf45..85a44c4 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     = '734'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '735'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.4.0'; // ← 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 b03c463..2139e07 100644
--- a/backend/static/js/pages/admin.js
+++ b/backend/static/js/pages/admin.js
@@ -931,16 +931,17 @@ window.Page_admin = (() => {
           Aktuelle Stufe: <strong>${currentTier}</strong>
         </p>
         <div style="display:flex;flex-direction:column;gap:var(--space-2)">
-          ${tiers.filter(t => t !== currentTier).map(t => `
-            <button class="btn btn-secondary adm-tier-choice" data-tier="${t}" form="">
-              ${tierLabels[t]}
+          ${tiers.map(t => `
+            <button class="btn ${t === currentTier ? 'btn-primary' : 'btn-secondary'} adm-tier-choice"
+                    data-tier="${t}" form="" ${t === currentTier ? 'disabled' : ''}>
+              ${tierLabels[t]}${t === currentTier ? ' ✓' : ''}
             </button>
           `).join('')}
         </div>
       `,
     });
 
-    document.querySelectorAll('.adm-tier-choice').forEach(btn => {
+    document.querySelectorAll('.adm-tier-choice:not([disabled])').forEach(btn => {
       btn.addEventListener('click', async () => {
         UI.modal.close();
         try {
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 7b9adbd..dbc104c 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-v734';
+const CACHE_VERSION = 'by-v735';
 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