feat: initial commit - finanzas app

Complete personal finance management application with:
- Dashboard with financial metrics and alerts
- Credit card management and payments
- Fixed and variable debt tracking
- Monthly budget planning
- Intelligent alert system
- Responsive design with Tailwind CSS

Tech stack: Next.js 14, TypeScript, Zustand, Recharts

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

lib/store/slices/alertsSlice.ts

@@ -0,0 +1,45 @@
+import { StateCreator } from 'zustand'
+import { v4 as uuidv4 } from 'uuid'
+import { Alert } from '@/lib/types'
+
+export interface AlertsSlice {
+    alerts: Alert[]
+
+    addAlert: (alert: Omit<Alert, 'id' | 'date'>) => void
+    markAlertAsRead: (id: string) => void
+    deleteAlert: (id: string) => void
+    clearAllAlerts: () => void
+}
+
+export const createAlertsSlice: StateCreator<AlertsSlice> = (set) => ({
+    alerts: [],
+
+    addAlert: (alert) =>
+        set((state) => ({
+            alerts: [
+                ...state.alerts,
+                {
+                    ...alert,
+                    id: uuidv4(),
+                    date: new Date().toISOString(),
+                },
+            ],
+        })),
+
+    markAlertAsRead: (id) =>
+        set((state) => ({
+            alerts: state.alerts.map((a) =>
+                a.id === id ? { ...a, isRead: true } : a
+            ),
+        })),
+
+    deleteAlert: (id) =>
+        set((state) => ({
+            alerts: state.alerts.filter((a) => a.id !== id),
+        })),
+
+    clearAllAlerts: () =>
+        set(() => ({
+            alerts: [],
+        })),
+})