feat(dashboard): reemplazar Load More por paginación con overlay de carga

- Añadir AJAX handlers para paginación en las 3 tablas (búsquedas, clicks, sin resultados)
- Implementar controles de paginación estilo sitio principal (Inicio, números, Ver más, Fin)
- Añadir overlay de carga que mantiene el tamaño del card (sin saltos visuales)
- Estilos de paginación: botones con padding 8px 16px, border-radius 6px, activo naranja #FF8600
- Spinner CSS puro centrado durante la carga
- Deshabilitar pointer-events mientras carga para evitar doble clic

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

admin/assets/dashboard.css

@@ -89,6 +89,46 @@ body .card {
     display: none;
 }
 
+/* =================================================================
+   Table Loading State (overlay sin cambiar tamaño)
+   ================================================================= */
+
+.dashboard-analytics-wrap .card.is-loading-table {
+    position: relative;
+    pointer-events: none;
+}
+
+.dashboard-analytics-wrap .card.is-loading-table::after {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(255, 255, 255, 0.7);
+    z-index: 10;
+}
+
+.dashboard-analytics-wrap .card.is-loading-table::before {
+    content: '';
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    width: 24px;
+    height: 24px;
+    margin: -12px 0 0 -12px;
+    border: 3px solid #f3f3f3;
+    border-top: 3px solid #FF8600;
+    border-radius: 50%;
+    z-index: 11;
+    animation: spin 0.8s linear infinite;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
 /* =================================================================
    KPI Cards - Sin efecto hover
    ================================================================= */
@@ -123,6 +163,55 @@ body .card {
     border-color: #FF8600;
 }
 
+/* =================================================================
+   Pagination - Estilo igual al sitio principal
+   ================================================================= */
+
+.dashboard-analytics-wrap .pagination {
+    gap: 0.25rem;
+    flex-wrap: wrap;
+}
+
+.dashboard-analytics-wrap .pagination .page-item .page-link {
+    padding: 8px 16px;
+    margin: 0 4px;
+    border-radius: 6px;
+    border: 1px solid #e5e7eb;
+    font-size: 1rem;
+    min-height: 42px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: #374151;
+    background-color: #fff;
+    text-decoration: none;
+    transition: all 0.2s ease;
+}
+
+.dashboard-analytics-wrap .pagination .page-item .page-link:hover {
+    background-color: #f3f4f6;
+    border-color: #d1d5db;
+    color: #111827;
+}
+
+.dashboard-analytics-wrap .pagination .page-item.active .page-link {
+    background-color: #FF8600;
+    border-color: #FF8600;
+    color: #fff;
+}
+
+.dashboard-analytics-wrap .pagination .page-item.disabled .page-link {
+    background-color: #f9fafb;
+    border-color: #e5e7eb;
+    color: #9ca3af;
+    cursor: not-allowed;
+}
+
+/* Botones de navegación (flechas) */
+.dashboard-analytics-wrap .pagination .page-item .page-link i {
+    font-size: 0.875rem;
+}
+
 /* =================================================================
    Responsive
    ================================================================= */
@@ -135,4 +224,11 @@ body .card {
     .dashboard-analytics-wrap .card-body {
         padding: 0.75rem;
     }
+
+    .dashboard-analytics-wrap .pagination .page-item .page-link {
+        padding: 6px 12px;
+        font-size: 0.875rem;
+        min-height: 36px;
+        margin: 0 2px;
+    }
 }