feat(alertas): add alerts CRUD with stats and management UI

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/lib/api/alertas.ts

@@ -0,0 +1,33 @@
+import { apiClient } from './client';
+import type { AlertaFull, AlertaCreate, AlertaUpdate, AlertasStats } from '@horux/shared';
+
+export async function getAlertas(filters?: { leida?: boolean; resuelta?: boolean }): Promise<AlertaFull[]> {
+  const params = new URLSearchParams();
+  if (filters?.leida !== undefined) params.set('leida', String(filters.leida));
+  if (filters?.resuelta !== undefined) params.set('resuelta', String(filters.resuelta));
+  const response = await apiClient.get<AlertaFull[]>(`/alertas?${params}`);
+  return response.data;
+}
+
+export async function getStats(): Promise<AlertasStats> {
+  const response = await apiClient.get<AlertasStats>('/alertas/stats');
+  return response.data;
+}
+
+export async function createAlerta(data: AlertaCreate): Promise<AlertaFull> {
+  const response = await apiClient.post<AlertaFull>('/alertas', data);
+  return response.data;
+}
+
+export async function updateAlerta(id: number, data: AlertaUpdate): Promise<AlertaFull> {
+  const response = await apiClient.patch<AlertaFull>(`/alertas/${id}`, data);
+  return response.data;
+}
+
+export async function deleteAlerta(id: number): Promise<void> {
+  await apiClient.delete(`/alertas/${id}`);
+}
+
+export async function markAllAsRead(): Promise<void> {
+  await apiClient.post('/alertas/mark-all-read');
+}