fix(dark-mode): dark mode completo + gráficas adaptadas

Dark mode fixes:
- Cards secundarias: Mis capturas, Mis clientes, Actividades, Apartados por vencer, Equipo
- Botones: Exportar, Descartar, Afluencia, Agendo, Forzar reconexión, Subir archivo
- Config: ModoTrabajo, Usuarios, Sistema, RolesPermisos, ConfigPage
- Cotizador: inputs, tabs, placeholder, botón compartir
- Alta clientes: BotonOcrIne, FileUploader
- Cobranza: toggle dashboard, modal abono
- Dashboards: tabs

Gráficas Recharts:
- CSS variables para colores chart (grid, text, tooltip)
- Helper isDark() + axisTextColor() + gridStroke() + tooltipProps()
- DashboardVendedor: grid, axes, tooltips adaptados
- TableroGeneral: grid, axes, tooltips (BarChart, Funnel, PieChart)
- MiTablero: tooltip adaptado
- Perfilamiento: grid, axes, tooltip

7 apps construidas limpias.

apps/dashboards/src/pages/DashboardPage.tsx

@@ -64,7 +64,7 @@ export default function DashboardPage() {
             <DarkModeToggle />
             {permitidas.length > 1 && (
               <div
-                className="inline-flex rounded-lg border border-[#E5E7EB] bg-[#F1F5F9] p-0.5 sm:p-1"
+                className="inline-flex rounded-lg border border-[#E5E7EB] bg-[#F1F5F9] p-0.5 dark:border-[#334155] dark:bg-[#1E293B] sm:p-1"
                 role="tablist"
                 aria-label="Vista del tablero"
               >
@@ -77,8 +77,8 @@ export default function DashboardPage() {
                     onClick={() => setElegida(v.id)}
                     className={
                       vista === v.id
-                        ? 'rounded-md bg-white px-2 py-1.5 text-[10px] font-medium text-[#111827] dark:text-[#E2E8F0] shadow-sm transition-all duration-100 ease-out sm:px-3 sm:text-xs'
-                        : 'rounded-md px-2 py-1.5 text-[10px] font-medium text-[#64748B] dark:text-[#94A3B8] transition-all duration-100 ease-out hover:text-[#111827] dark:text-[#E2E8F0] sm:px-3 sm:text-xs'
+                        ? 'rounded-md bg-white px-2 py-1.5 text-[10px] font-medium text-[#111827] dark:text-[#E2E8F0] shadow-sm transition-all duration-100 ease-out sm:px-3 sm:text-xs dark:bg-[#1E293B]'
+                        : 'rounded-md px-2 py-1.5 text-[10px] font-medium text-[#64748B] dark:text-[#94A3B8] transition-all duration-100 ease-out hover:text-[#111827] dark:hover:text-[#E2E8F0] sm:px-3 sm:text-xs'
                     }
                   >
                     {v.etiqueta}