feat(expenses): add edit amount and due date for pending expenses

apps/backend/src/modules/expenses/expenses.routes.ts

@@ -12,6 +12,7 @@ import { listExpensesHandler } from "./handlers/listExpenses";
 import { listPeriodicExpensesHandler } from "./handlers/listPeriodicExpenses";
 import { payExpenseHandler } from "./handlers/payExpense";
 import { softDeletePeriodicExpenseHandler } from "./handlers/softDeletePeriodicExpense";
+import { updateExpenseHandler } from "./handlers/updateExpense";
 import { updatePeriodicExpenseHandler } from "./handlers/updatePeriodicExpense";
 
 const app = new Hono();
@@ -34,5 +35,6 @@ app.get("/expenses", listExpensesHandler);
 app.post("/expenses", createNonPeriodicExpenseHandler);
 app.post("/expenses/import", importExpensesHandler);
 app.put("/expenses/:id/pay", payExpenseHandler);
+app.put("/expenses/:id", updateExpenseHandler);
 
 export default app;

apps/backend/src/modules/expenses/expenses.service.ts

@@ -23,6 +23,11 @@ export const payExpenseSchema = z.object({
   paymentDate: z.string().datetime().optional(),
 });
 
+export const updateExpenseSchema = z.object({
+  amount: z.number().positive("El monto debe ser mayor a 0"),
+  dueDate: z.string().datetime({ message: "La fecha debe ser una fecha ISO válida" }),
+});
+
 function lastDayOfMonth(year: number, month: number): number {
   return new Date(year, month, 0).getDate();
 }
@@ -187,6 +192,32 @@ export async function payExpense(
   return result;
 }
 
+export async function updateExpense(
+  id: number,
+  data: z.infer<typeof updateExpenseSchema>,
+) {
+  const existing = await prisma.expense.findUniqueOrThrow({ where: { id } });
+  if (existing.status !== PaymentStatus.PENDING) {
+    throw new Error("Solo se pueden editar gastos pendientes");
+  }
+
+  const dueDate = new Date(data.dueDate);
+  const year = dueDate.getUTCFullYear();
+  const month = dueDate.getUTCMonth() + 1;
+
+  const result = await prisma.expense.update({
+    where: { id },
+    data: {
+      amount: data.amount,
+      dueDate,
+      year,
+      month,
+    },
+  });
+  cache.invalidateByPrefix("expenses:");
+  return result;
+}
+
 export async function getMonthlyPayedTotal(year: number, month: number) {
   const cacheKey = `expenses:monthly-total:${year}:${month}`;
   const cached = cache.get(cacheKey);

apps/backend/src/modules/expenses/handlers/updateExpense.ts

@@ -0,0 +1,10 @@
+import type { Context } from "hono";
+import { updateExpense, updateExpenseSchema } from "../expenses.service";
+
+export async function updateExpenseHandler(c: Context) {
+  const id = Number(c.req.param("id"));
+  const body = await c.req.json();
+  const parsed = updateExpenseSchema.parse(body);
+  const result = await updateExpense(id, parsed);
+  return c.json(result);
+}

apps/backend/tests/expenses.test.ts

@@ -11,6 +11,7 @@ const mockPrisma = {
   expense: {
     findMany: mock(),
     findFirst: mock(),
+    findUniqueOrThrow: mock(),
     create: mock(),
     update: mock(),
     count: mock(),
@@ -36,6 +37,7 @@ const {
   createPeriodicExpenseSchema,
   createNonPeriodicExpenseSchema,
   payExpenseSchema,
+  updateExpenseSchema,
   buildDueDate,
   getCurrentYearMonthUTC,
   listPeriodicExpenses,
@@ -45,6 +47,7 @@ const {
   listExpenses,
   createNonPeriodicExpense,
   payExpense,
+  updateExpense,
   generateExpensesForCurrentMonth,
   generateMonthlyExpense,
 } = await import("../src/modules/expenses/expenses.service");
@@ -179,6 +182,35 @@ describe("schemas", () => {
       expect(() => payExpenseSchema.parse({ amountPayed: 0 })).toThrow();
     });
   });
+
+  describe("updateExpenseSchema", () => {
+    test("accepts valid input", () => {
+      const result = updateExpenseSchema.parse({
+        amount: 2500,
+        dueDate: "2026-07-15T00:00:00.000Z",
+      });
+      expect(result.amount).toBe(2500);
+      expect(result.dueDate).toBe("2026-07-15T00:00:00.000Z");
+    });
+
+    test("rejects non-positive amount", () => {
+      expect(() =>
+        updateExpenseSchema.parse({
+          amount: 0,
+          dueDate: "2026-07-15T00:00:00.000Z",
+        }),
+      ).toThrow();
+    });
+
+    test("rejects invalid dueDate", () => {
+      expect(() =>
+        updateExpenseSchema.parse({
+          amount: 100,
+          dueDate: "not-a-date",
+        }),
+      ).toThrow();
+    });
+  });
 });
 
 describe("buildDueDate", () => {
@@ -430,6 +462,45 @@ describe("payExpense", () => {
   });
 });
 
+describe("updateExpense", () => {
+  test("updates amount and dueDate for a PENDING expense", async () => {
+    const existing = {
+      id: 1,
+      status: PaymentStatus.PENDING,
+      amount: 1500,
+      dueDate: new Date("2026-06-15T00:00:00.000Z"),
+      year: 2026,
+      month: 6,
+    };
+    mockPrisma.expense.findUniqueOrThrow.mockResolvedValueOnce(existing);
+    mockPrisma.expense.update.mockImplementationOnce(
+      async ({ where, data }) => ({ id: where.id, ...existing, ...data }),
+    );
+
+    const result = await updateExpense(1, {
+      amount: 2000,
+      dueDate: "2026-07-20T00:00:00.000Z",
+    });
+    expect(result.amount).toBe(2000);
+    expect(result.year).toBe(2026);
+    expect(result.month).toBe(7);
+  });
+
+  test("rejects update for PAYED expense", async () => {
+    mockPrisma.expense.findUniqueOrThrow.mockResolvedValueOnce({
+      id: 1,
+      status: PaymentStatus.PAYED,
+    });
+
+    expect(
+      updateExpense(1, {
+        amount: 100,
+        dueDate: "2026-07-15T00:00:00.000Z",
+      }),
+    ).rejects.toThrow("Solo se pueden editar gastos pendientes");
+  });
+});
+
 describe("generateExpensesForCurrentMonth", () => {
   test("skips existing expenses to avoid duplicates", async () => {
     const { month } = getCurrentYearMonthUTC();

apps/frontend/src/features/expenses/ExpensesProvider.tsx

@@ -18,6 +18,7 @@ import type {
   PaginatedResponse,
   PayExpenseInput,
   PeriodicExpense,
+  UpdateExpenseInput,
 } from "@/lib/api";
 import {
   useCreateNonPeriodicExpense,
@@ -31,6 +32,7 @@ import {
   usePayExpense,
   usePeriodicExpenses,
   useTotalPending,
+  useUpdateExpense,
   useUpdatePeriodicExpense,
 } from "@/lib/queries";
 
@@ -68,6 +70,7 @@ interface ExpensesContextValue {
     data: CreateNonPeriodicExpenseInput,
   ) => Promise<void>;
   payExpense: (id: number, data: PayExpenseInput) => Promise<void>;
+  updateExpense: (id: number, data: UpdateExpenseInput) => Promise<void>;
   importPeriodicExpenses: (file: File) => Promise<ImportResult>;
   importExpenses: (file: File) => Promise<ImportExpensesResult>;
 }
@@ -133,6 +136,7 @@ export function ExpensesProvider({
   const generateMonthlyMutation = useGenerateMonthlyExpense();
   const createExpenseMutation = useCreateNonPeriodicExpense();
   const payExpenseMutation = usePayExpense();
+  const updateExpenseMutation = useUpdateExpense();
   const importPeriodicMutation = useImportPeriodicExpenses();
   const importExpensesMutation = useImportExpenses();
 
@@ -192,6 +196,13 @@ export function ExpensesProvider({
     [payExpenseMutation],
   );
 
+  const updateExpenseFn = useCallback(
+    async (id: number, data: UpdateExpenseInput) => {
+      await updateExpenseMutation.mutateAsync({ id, data });
+    },
+    [updateExpenseMutation],
+  );
+
   return (
     <ExpensesContext
       value={{
@@ -218,6 +229,7 @@ export function ExpensesProvider({
         generateMonthlyExpense: generateMonthlyExpenseFn,
         createNonPeriodicExpense: createNonPeriodicExpenseFn,
         payExpense: payExpenseFn,
+        updateExpense: updateExpenseFn,
         importPeriodicExpenses: importPeriodicExpensesFn,
         importExpenses: importExpensesFn,
       }}

apps/frontend/src/features/expenses/components/EditExpenseDialog.tsx

@@ -0,0 +1,170 @@
+import { zodResolver } from "@hookform/resolvers/zod";
+import { useEffect, useRef } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { z } from "zod";
+import { Button } from "@/components/ui/button";
+import { DatePicker } from "@/components/ui/date-picker";
+import {
+  ResponsiveDialog,
+  ResponsiveDialogContent,
+  ResponsiveDialogFooter,
+  ResponsiveDialogHeader,
+  ResponsiveDialogTitle,
+} from "@/components/ui/responsive-dialog";
+import type { Expense } from "@/lib/api";
+import { useExpensesContext } from "../ExpensesProvider";
+
+const editSchema = z.object({
+  amount: z.number().positive("El monto debe ser mayor a 0"),
+  dueDate: z.date({ message: "La fecha es obligatoria" }),
+});
+
+type EditFormValues = z.infer<typeof editSchema>;
+
+interface EditExpenseDialogProps {
+  expense: Expense | null;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}
+
+export function EditExpenseDialog({
+  expense,
+  open,
+  onOpenChange,
+}: EditExpenseDialogProps) {
+  const { updateExpense } = useExpensesContext();
+  const amountInputRef = useRef<HTMLInputElement | null>(null);
+
+  const {
+    register,
+    handleSubmit,
+    control,
+    formState: { errors, isSubmitting },
+    reset,
+  } = useForm<EditFormValues>({
+    resolver: zodResolver(editSchema),
+    defaultValues: {
+      amount: 0,
+      dueDate: undefined,
+    },
+  });
+  const { ref: amountRef, ...amountField } = register("amount", {
+    setValueAs: (value) => Number(value),
+  });
+
+  useEffect(() => {
+    if (expense) {
+      reset({
+        amount: Number(expense.amount),
+        dueDate: new Date(expense.dueDate),
+      });
+    }
+  }, [expense, reset]);
+
+  useEffect(() => {
+    if (!open || !expense) return;
+
+    const frame = requestAnimationFrame(() => {
+      amountInputRef.current?.focus();
+      amountInputRef.current?.select();
+    });
+
+    return () => cancelAnimationFrame(frame);
+  }, [open, expense]);
+
+  function handleClose(open: boolean) {
+    onOpenChange(open);
+    if (!open) reset();
+  }
+
+  async function onSubmit(data: EditFormValues) {
+    if (!expense) return;
+    await updateExpense(expense.id, {
+      amount: data.amount,
+      dueDate: data.dueDate.toISOString(),
+    });
+    handleClose(false);
+  }
+
+  if (!expense) return null;
+
+  return (
+    <ResponsiveDialog open={open} onOpenChange={handleClose}>
+      <ResponsiveDialogContent>
+        <ResponsiveDialogHeader>
+          <ResponsiveDialogTitle>Editar gasto</ResponsiveDialogTitle>
+        </ResponsiveDialogHeader>
+
+        <div className="flex flex-col gap-1 rounded-lg bg-muted px-3 py-2 text-sm">
+          <span className="font-medium">{expense.description}</span>
+        </div>
+
+        <form
+          id="edit-expense-form"
+          onSubmit={handleSubmit(onSubmit)}
+          className="flex flex-col gap-4"
+        >
+          <div className="flex flex-col gap-1.5">
+            <label htmlFor="amount" className="text-sm font-medium">
+              Monto
+            </label>
+            <input
+              id="amount"
+              type="text"
+              inputMode="numeric"
+              pattern="[0-9]*"
+              {...amountField}
+              ref={(node) => {
+                amountRef(node);
+                amountInputRef.current = node;
+              }}
+              className="h-8 rounded-lg border border-input bg-background px-2.5 text-sm outline-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50"
+            />
+            {errors.amount && (
+              <span className="text-xs text-destructive">
+                {errors.amount.message}
+              </span>
+            )}
+          </div>
+
+          <div className="flex flex-col gap-1.5">
+            <span className="text-sm font-medium">Fecha de vencimiento</span>
+            <Controller
+              control={control}
+              name="dueDate"
+              render={({ field }) => (
+                <DatePicker
+                  value={field.value}
+                  onChange={field.onChange}
+                  placeholder="Seleccionar fecha"
+                />
+              )}
+            />
+            {errors.dueDate && (
+              <span className="text-xs text-destructive">
+                {errors.dueDate.message}
+              </span>
+            )}
+          </div>
+        </form>
+
+        <ResponsiveDialogFooter>
+          <Button
+            variant="outline"
+            onClick={() => handleClose(false)}
+            disabled={isSubmitting}
+          >
+            Cancelar
+          </Button>
+          <Button
+            type="submit"
+            form="edit-expense-form"
+            disabled={isSubmitting}
+          >
+            Guardar cambios
+          </Button>
+        </ResponsiveDialogFooter>
+      </ResponsiveDialogContent>
+    </ResponsiveDialog>
+  );
+}

apps/frontend/src/features/expenses/components/ExpensesTabContent.tsx

@@ -18,6 +18,7 @@ import {
 } from "@/components/ui/select";
 import type { Expense, ImportExpensesResult } from "@/lib/api";
 import { useExpensesContext } from "../ExpensesProvider";
+import { EditExpenseDialog } from "./EditExpenseDialog";
 import { ExpensesTable } from "./ExpensesTable";
 import { NewExpenseDialog } from "./NewExpenseDialog";
 import { PayExpenseDialog } from "./PayExpenseDialog";
@@ -49,6 +50,9 @@ export function ExpensesTabContent() {
   const [payDialogExpense, setPayDialogExpense] = useState<Expense | null>(
     null,
   );
+  const [editDialogExpense, setEditDialogExpense] = useState<Expense | null>(
+    null,
+  );
   const [newExpenseOpen, setNewExpenseOpen] = useState(false);
 
   const [importDialogOpen, setImportDialogOpen] = useState(false);
@@ -153,6 +157,7 @@ export function ExpensesTabContent() {
         <ExpensesTable
           data={expenses.data}
           onPay={setPayDialogExpense}
+          onEdit={setEditDialogExpense}
           page={expenses.page}
           total={expenses.total}
           pageSize={expenses.pageSize}
@@ -199,6 +204,14 @@ export function ExpensesTabContent() {
         }}
       />
 
+      <EditExpenseDialog
+        expense={editDialogExpense}
+        open={editDialogExpense !== null}
+        onOpenChange={(open) => {
+          if (!open) setEditDialogExpense(null);
+        }}
+      />
+
       <NewExpenseDialog
         open={newExpenseOpen}
         onOpenChange={setNewExpenseOpen}

apps/frontend/src/features/expenses/components/ExpensesTable.tsx

@@ -8,6 +8,7 @@ import {
   ChevronsLeftIcon,
   ChevronsRightIcon,
   CircleDollarSign,
+  Pencil,
   SkipBackIcon,
   SkipForwardIcon,
 } from "lucide-react";
@@ -26,6 +27,7 @@ import type { Expense } from "@/lib/api";
 interface ExpensesTableProps {
   data: Expense[];
   onPay: (expense: Expense) => void;
+  onEdit: (expense: Expense) => void;
   page: number;
   total: number;
   pageSize: number;
@@ -70,6 +72,7 @@ function ExpenseStatusBadge({ status }: { status: Expense["status"] }) {
 export function ExpensesTable({
   data,
   onPay,
+  onEdit,
   page,
   total,
   pageSize,
@@ -137,7 +140,15 @@ export function ExpensesTable({
           const expense = row.original;
           if (expense.status === "PAYED") return null;
           return (
-            <div className="flex justify-end">
+            <div className="flex justify-end gap-1">
+              <Button
+                variant="ghost"
+                size="xs"
+                onClick={() => onEdit(expense)}
+              >
+                <Pencil className="size-3.5" />
+                Editar
+              </Button>
               <Button
                 variant="outline"
                 size="xs"
@@ -151,7 +162,7 @@ export function ExpensesTable({
         },
       },
     ],
-    [onPay],
+    [onPay, onEdit],
   );
 
   const table = useReactTable({
@@ -227,15 +238,25 @@ export function ExpensesTable({
               </div>
 
               {expense.status !== "PAYED" && (
-                <Button
-                  variant="outline"
-                  size="sm"
-                  className="shrink-0"
-                  onClick={() => onPay(expense)}
-                >
-                  <CircleDollarSign className="size-3.5" />
-                  Pagar
-                </Button>
+                <div className="flex gap-1">
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    className="shrink-0"
+                    onClick={() => onEdit(expense)}
+                  >
+                    <Pencil className="size-3.5" />
+                  </Button>
+                  <Button
+                    variant="outline"
+                    size="sm"
+                    className="shrink-0"
+                    onClick={() => onPay(expense)}
+                  >
+                    <CircleDollarSign className="size-3.5" />
+                    Pagar
+                  </Button>
+                </div>
               )}
             </div>
           </div>

apps/frontend/src/lib/api.ts

@@ -154,6 +154,11 @@ export type PayExpenseInput = {
   paymentDate?: string;
 };
 
+export type UpdateExpenseInput = {
+  amount: number;
+  dueDate: string;
+};
+
 export function getPeriodicExpenses(): Promise<PeriodicExpense[]> {
   return fetcher<PeriodicExpense[]>("/api/periodic-expenses");
 }
@@ -263,6 +268,13 @@ export function payExpense(
   return mutator<Expense>(`/api/expenses/${id}/pay`, "PUT", data);
 }
 
+export function updateExpense(
+  id: number,
+  data: UpdateExpenseInput,
+): Promise<Expense> {
+  return mutator<Expense>(`/api/expenses/${id}`, "PUT", data);
+}
+
 export type ImportResult = {
   imported: number;
   skipped: number;

apps/frontend/src/lib/queries.ts

@@ -27,6 +27,8 @@ import {
   importPeriodicExpenses,
   type PayExpenseInput,
   payExpense as payExpenseApi,
+  type UpdateExpenseInput,
+  updateExpense as updateExpenseApi,
   updatePeriodicExpense as updatePeriodicExpenseApi,
 } from "./api";
 
@@ -279,3 +281,14 @@ export function usePayExpense() {
     },
   });
 }
+
+export function useUpdateExpense() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, data }: { id: number; data: UpdateExpenseInput }) =>
+      updateExpenseApi(id, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: expenseKeys.all });
+    },
+  });
+}