diff --git a/backend/main.py b/backend/main.py
index 02a8216..9ab4a1e 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -406,7 +406,7 @@ async def serve_media(path: str, request: _Request):
         raise _HE(404, "Nicht gefunden.")
     return _media_response(filepath)
 
-APP_VER = "898"  # muss mit APP_VER in app.js übereinstimmen
+APP_VER = "899"  # muss mit APP_VER in app.js übereinstimmen
 
 @app.get("/.well-known/assetlinks.json")
 async def assetlinks():
diff --git a/backend/static/index.html b/backend/static/index.html
index b95c0b4..07cacba 100644
--- a/backend/static/index.html
+++ b/backend/static/index.html
@@ -591,10 +591,10 @@
 <div id="modal-container"></div>
 
 <!-- JS: Reihenfolge ist wichtig — erst Basis, dann Features -->
-<script src="/js/api.js?v=898"></script>
-<script src="/js/ui.js?v=898"></script>
-<script src="/js/app.js?v=898"></script>
-<script src="/js/worlds.js?v=898"></script>
+<script src="/js/api.js?v=899"></script>
+<script src="/js/ui.js?v=899"></script>
+<script src="/js/app.js?v=899"></script>
+<script src="/js/worlds.js?v=899"></script>
 
 <!-- Feature-Seiten werden lazy geladen -->
 
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index c50ddd6..7b5af08 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     = '898'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '899'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.5.1'; // ← semantische Version, wird bei make release gesetzt
 const IS_STAGING  = location.hostname === 'staging.banyaro.app';
 // Cache-Bust-Parameter nach Update-Reload sofort entfernen
diff --git a/backend/static/js/pages/zuchthunde.js b/backend/static/js/pages/zuchthunde.js
index 1b2131b..4d6bb63 100644
--- a/backend/static/js/pages/zuchthunde.js
+++ b/backend/static/js/pages/zuchthunde.js
@@ -100,25 +100,25 @@ window.Page_zuchthunde = (() => {
   function _render() {
     _container.innerHTML = `
       <div class="zh-layout">
-        <div class="by-toolbar">
-          <h2 style="margin:0;font-size:var(--text-lg);font-weight:var(--weight-semibold)">
+        <div class="by-toolbar" style="overflow-x:auto;flex-wrap:nowrap">
+          <h2 style="margin:0;font-size:var(--text-lg);font-weight:var(--weight-semibold);flex-shrink:0;white-space:nowrap">
             ${UI.icon('dog')} Zuchtkartei
           </h2>
-          <button class="btn btn-primary btn-sm" id="zh-new-btn">
+          <button class="btn btn-primary btn-sm" id="zh-new-btn" style="flex-shrink:0">
             ${UI.icon('plus')} Hund anlegen
           </button>
-          <button class="btn btn-secondary btn-sm" id="zh-trial-btn">
+          <button class="btn btn-secondary btn-sm" id="zh-trial-btn" style="flex-shrink:0;white-space:nowrap">
             ${UI.icon('heart-fill')} Probeverpaarung
           </button>
           <a href="/api/breeder/export" download class="btn btn-ghost btn-sm" id="zh-export-btn"
-             title="Alle Daten herunterladen (HTML + ODS)">
+             style="flex-shrink:0" title="Alle Daten herunterladen (HTML + ODS)">
             ${UI.icon('download-simple')} Export
           </a>
           ${_appState?.user?.ki_zucht_jahresbericht !== 0 ? `
-          <a class="btn btn-ghost btn-sm" id="zh-jahresbericht-btn">
+          <a class="btn btn-ghost btn-sm" id="zh-jahresbericht-btn" style="flex-shrink:0;white-space:nowrap">
             ${UI.icon('chart-bar')} Jahresbericht
           </a>
-          <a class="btn btn-ghost btn-sm" id="zh-jahresbericht-archiv-btn" title="Frühere Berichte">
+          <a class="btn btn-ghost btn-sm" id="zh-jahresbericht-archiv-btn" style="flex-shrink:0" title="Frühere Berichte">
             ${UI.icon('archive')}
           </a>` : ''}
         </div>
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 724fef8..e90b85b 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-v898';
+const CACHE_VERSION = 'by-v899';
 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