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/debtsSlice.ts

@@ -0,0 +1,73 @@
+import { StateCreator } from 'zustand'
+import { v4 as uuidv4 } from 'uuid'
+import { FixedDebt, VariableDebt } from '@/lib/types'
+
+export interface DebtsSlice {
+  fixedDebts: FixedDebt[]
+  variableDebts: VariableDebt[]
+  
+  // Actions Fixed
+  addFixedDebt: (debt: Omit<FixedDebt, 'id'>) => void
+  updateFixedDebt: (id: string, debt: Partial<FixedDebt>) => void
+  deleteFixedDebt: (id: string) => void
+  toggleFixedDebtPaid: (id: string) => void
+  
+  // Actions Variable
+  addVariableDebt: (debt: Omit<VariableDebt, 'id'>) => void
+  updateVariableDebt: (id: string, debt: Partial<VariableDebt>) => void
+  deleteVariableDebt: (id: string) => void
+  toggleVariableDebtPaid: (id: string) => void
+}
+
+export const createDebtsSlice: StateCreator<DebtsSlice> = (set) => ({
+  fixedDebts: [],
+  variableDebts: [],
+
+  addFixedDebt: (debt) =>
+    set((state) => ({
+      fixedDebts: [...state.fixedDebts, { ...debt, id: uuidv4() }],
+    })),
+
+  updateFixedDebt: (id, debt) =>
+    set((state) => ({
+      fixedDebts: state.fixedDebts.map((d) =>
+        d.id === id ? { ...d, ...debt } : d
+      ),
+    })),
+
+  deleteFixedDebt: (id) =>
+    set((state) => ({
+      fixedDebts: state.fixedDebts.filter((d) => d.id !== id),
+    })),
+
+  toggleFixedDebtPaid: (id) =>
+    set((state) => ({
+      fixedDebts: state.fixedDebts.map((d) =>
+        d.id === id ? { ...d, isPaid: !d.isPaid } : d
+      ),
+    })),
+
+  addVariableDebt: (debt) =>
+    set((state) => ({
+      variableDebts: [...state.variableDebts, { ...debt, id: uuidv4() }],
+    })),
+
+  updateVariableDebt: (id, debt) =>
+    set((state) => ({
+      variableDebts: state.variableDebts.map((d) =>
+        d.id === id ? { ...d, ...debt } : d
+      ),
+    })),
+
+  deleteVariableDebt: (id) =>
+    set((state) => ({
+      variableDebts: state.variableDebts.filter((d) => d.id !== id),
+    })),
+
+  toggleVariableDebtPaid: (id) =>
+    set((state) => ({
+      variableDebts: state.variableDebts.map((d) =>
+        d.id === id ? { ...d, isPaid: !d.isPaid } : d
+      ),
+    })),
+})