Boutons Recharger + Quitter sur l'ecran de choix admin

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

frontend/index.html

@@ -147,6 +147,10 @@
           <span>Parametres</span>
         </button>
       </div>
+      <div style="display:flex;gap:1rem;margin-top:1rem">
+        <button class="btn-secondaire" onclick="location.reload()">Recharger</button>
+        <button class="btn-secondaire" onclick="quitterNavigateur()">Quitter</button>
+      </div>
       <button class="btn-retour" onclick="allerA('accueil')">Retour</button>
     </section>