feat(mejoras): 14 mejoras al CRM Frasa

Fase 1 - UI: dark mode, skeletons, toasts
Fase 2 - Filtros: avanzados Mi día, búsqueda global Ctrl+K
Fase 3 - Datos: export Excel, notas apartados, auditoría
Fase 4 - Dashboard: gráficas vendedor + métricas uso
Fase 5 - Responsive: tablets optimizadas
Fase 6 - PWA: IndexedDB offline, push notifications

Backend: 3 tablas nuevas, 6 services, 6 endpoints nuevos
721 API tests + fronts verdes.

apps/mi-dia/public/manifest.json

@@ -0,0 +1,12 @@
+{
+  "name": "FRASA CRM",
+  "short_name": "FRASA",
+  "start_url": "/hoy/",
+  "display": "standalone",
+  "background_color": "#F8FAFC",
+  "theme_color": "#2563EB",
+  "icons": [
+    { "src": "/hoy/icons/icon-192.png", "sizes": "192x192", "type": "image/png" },
+    { "src": "/hoy/icons/icon-512.png", "sizes": "512x512", "type": "image/png" }
+  ]
+}

apps/mi-dia/public/sw.js

@@ -0,0 +1,21 @@
+/* eslint-env serviceworker */
+
+self.addEventListener('push', (event) => {
+  const data = event.data ? event.data.json() : {}
+  const titulo = data.titulo || 'FRASA'
+  const cuerpo = data.cuerpo || ''
+  const url = data.url || '/'
+  event.waitUntil(
+    self.registration.showNotification(titulo, {
+      body: cuerpo,
+      data: { url },
+      icon: '/hoy/icons/icon-192.png',
+    }),
+  )
+})
+
+self.addEventListener('notificationclick', (event) => {
+  event.notification.close()
+  const url = (event.notification.data && event.notification.data.url) || '/'
+  event.waitUntil(clients.openWindow(url))
+})