Replace rocket icon with 3D cube object icon 📦 for 3D model creation action buttons

frontend/viewer.html

@@ -361,7 +361,7 @@
                 <div id="aiImageContainer" style="display: none; flex-direction: column; gap: 10px; align-items: center; margin-top: 10px;">
                     <img id="aiImageMobile" style="max-width: 100%; max-height: 250px; border-radius: 8px; border: 1px solid rgba(255,255,255,0.1); margin: 0 auto; display: block;">
                     <button id="btnCreate3DFrom2DGenerated" style="width:100%; background:#10b981; color:#fff; border:none; padding:12px; border-radius:10px; font-weight:700; font-size:0.9rem; cursor:pointer; box-shadow: 0 4px 12px rgba(16,185,129,0.3); display: flex; align-items: center; justify-content: center; gap: 6px;">
-                        🚀 Crear Modelo 3D desde esta imagen (Cuesta 5 créditos)
+                        📦 Crear Modelo 3D desde esta imagen (Cuesta 5 créditos)
                     </button>
                 </div>
             </div>
@@ -377,7 +377,7 @@
                 <span id="creatorStatusDesc">Esto puede tardar unos segundos.</span>
             </div>
             <button id="btnCreate3DMobile" style="width: 100%; background: #10b981; color: #fff; border: none; padding: 14px; border-radius: 10px; font-weight: 700; font-size: 1rem; cursor: pointer; display: none; align-items: center; justify-content: center; gap: 8px; box-shadow: 0 4px 12px rgba(10,185,129,0.25);">
-                🚀 Crear Modelo 3D (Cuesta 5 créditos)
+                📦 Crear Modelo 3D (Cuesta 5 créditos)
             </button>
         </div>
     </div>
@@ -552,7 +552,7 @@
                             </div>
                         </div>
                         <div style="display:flex; gap:6px; align-items:center;">
-                            <button class="btn-create-3d" style="background:#10b981; color:#fff; border:none; padding:8px 12px; border-radius:8px; font-size:1.1rem; cursor:pointer; display:flex; align-items:center; justify-content:center;" title="Crear Modelo 3D">🚀</button>
+                            <button class="btn-create-3d" style="background:#10b981; color:#fff; border:none; padding:8px 12px; border-radius:8px; font-size:1.1rem; cursor:pointer; display:flex; align-items:center; justify-content:center;" title="Crear Modelo 3D">📦</button>
                             <button class="btn-delete" style="background:rgba(239,68,68,0.15); color:#ef4444; border:1px solid rgba(239,68,68,0.3); padding:8px 10px; border-radius:8px; font-size:1rem; cursor:pointer; display:flex; align-items:center; justify-content:center;" title="Eliminar">🗑️</button>
                         </div>
                     `;