feat(budget): aylık bütçe motoru, limitler ve ay sonu tahmini

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/migrations/010-budgets.ts

@@ -0,0 +1,10 @@
+import { BudgetModel } from "@/models/budget";
+import type { Migration } from "./types";
+
+export const migration: Migration = {
+  name: "010-budgets",
+  description: "budgets index'i (hane × ay benzersiz)",
+  async up() {
+    await BudgetModel.createIndexes();
+  },
+};

scripts/migrations/index.ts

@@ -9,10 +9,11 @@ import { migration as m006 } from "./006-card-statements";
 import { migration as m007 } from "./007-contacts";
 import { migration as m008 } from "./008-in-kind";
 import { migration as m009 } from "./009-assets";
+import { migration as m010 } from "./010-budgets";
 import type { Migration } from "./types";
 
 /** Sıralı migration listesi. Yeni migration: dosyayı ekle ve buraya sırayla ekle. */
-export const MIGRATIONS: Migration[] = [m001, m002, m003, m004, m005, m006, m007, m008, m009];
+export const MIGRATIONS: Migration[] = [m001, m002, m003, m004, m005, m006, m007, m008, m009, m010];
 
 const COLLECTION = "migrations";
 

src/features/budgets/actions.ts

@@ -0,0 +1,44 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { z } from "zod";
+import { tr } from "@/i18n/tr";
+import { fail, type ActionResult } from "@/lib/action-result";
+import { getHouseholdActionContext } from "@/lib/dal";
+import { budgetLimitsSchema, budgetMonthSchema } from "@/shared/schemas/budget";
+import { budgetFromActuals, copyPreviousBudget, saveBudget } from "./service";
+
+function fieldErrors(error: z.ZodError) {
+  const out: Record<string, string> = {};
+  for (const issue of error.issues) {
+    const key = issue.path.join(".");
+    if (key && !out[key]) out[key] = issue.message;
+  }
+  return out;
+}
+
+async function run<T>(
+  schema: z.ZodType<T>,
+  input: unknown,
+  fn: (userId: string, householdId: string, data: T) => Promise<ActionResult<unknown>>,
+): Promise<ActionResult<unknown>> {
+  const ctx = await getHouseholdActionContext("member");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const parsed = schema.safeParse(input);
+  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
+  const result = await fn(ctx.user.id, ctx.household.id, parsed.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}
+
+export async function saveBudgetAction(input: unknown) {
+  return run(budgetLimitsSchema, input, saveBudget);
+}
+
+export async function copyPreviousBudgetAction(month: unknown) {
+  return run(budgetMonthSchema, month, copyPreviousBudget);
+}
+
+export async function budgetFromActualsAction(month: unknown) {
+  return run(budgetMonthSchema, month, budgetFromActuals);
+}

src/features/budgets/service.int.test.ts

@@ -0,0 +1,243 @@
+import { Types } from "mongoose";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { createCategory } from "@/features/categories/service";
+import { AccountModel } from "@/models/account";
+import { BudgetModel } from "@/models/budget";
+import { HouseholdModel } from "@/models/household";
+import { TransactionModel } from "@/models/transaction";
+import { budgetPeriod, shiftMonth } from "@/shared/budget";
+import { istanbulDayStart, todayIstanbul } from "@/shared/dates";
+import { addDays } from "@/shared/recurrence";
+import { budgetLimitsSchema } from "@/shared/schemas/budget";
+import { categoryFormSchema } from "@/shared/schemas/category";
+import { setupSeededDb, teardownDb } from "@/test/seeded-db";
+import { budgetFromActuals, copyPreviousBudget, getBudget, saveBudget } from "./service";
+
+let ids: Awaited<ReturnType<typeof setupSeededDb>>;
+let cakir = "";
+let ayse = "";
+let emre = "";
+let zeynep = "";
+let fatma = "";
+// Seed verisinin olmadığı geçmiş bir ay: toplamlar yalnızca bu testin işlemlerinden oluşur.
+const M = shiftMonth(todayIstanbul().slice(0, 7), -24);
+const P = shiftMonth(M, -1);
+const cat = { ev: "", kira: "", aidat: "", keyif: "" };
+type CatKey = keyof typeof cat;
+
+beforeAll(async () => {
+  ids = await setupSeededDb();
+  cakir = ids.household("Çakır Ailesi");
+  ayse = ids.user("ayse");
+  emre = ids.user("emre");
+  zeynep = ids.user("zeynep");
+  fatma = ids.user("fatma");
+  const mk = async (key: CatKey, name: string, parent = "") => {
+    const r = await createCategory(
+      ayse,
+      cakir,
+      categoryFormSchema.parse({
+        kind: "expense",
+        name,
+        parentId: parent,
+        icon: "tag",
+        color: "blue",
+      }),
+    );
+    cat[key] = r.ok ? r.data.id : "";
+  };
+  await mk("ev", "Test Ev");
+  await mk("kira", "Test Kira", cat.ev);
+  await mk("aidat", "Test Aidat", cat.ev);
+  await mk("keyif", "Test Keyif");
+});
+afterAll(teardownDb);
+
+const acc = (name: string) =>
+  AccountModel.findOne({ householdId: cakir, name })
+    .lean()
+    .then((a) => a!._id);
+
+async function expense(input: {
+  date: string;
+  amountMinor: number;
+  category?: string;
+  splits?: { category: string; amountMinor: number }[];
+  account?: string;
+  status?: "posted" | "planned";
+  recurring?: boolean;
+  installment?: { planId: Types.ObjectId; index: number; count: number };
+}) {
+  const actor = new Types.ObjectId(ayse);
+  const splits = (input.splits ?? []).map((s) => ({
+    categoryId: new Types.ObjectId(s.category),
+    amountMinor: s.amountMinor,
+  }));
+  await TransactionModel.create({
+    householdId: new Types.ObjectId(cakir),
+    type: "expense",
+    status: input.status ?? "posted",
+    date: istanbulDayStart(input.date)!,
+    accountId: await acc(input.account ?? "Cüzdan"),
+    amountMinor: input.amountMinor,
+    categoryId: input.category ? new Types.ObjectId(input.category) : null,
+    splits,
+    effectiveCategoryIds: input.category
+      ? [new Types.ObjectId(input.category)]
+      : splits.map((s) => s.categoryId),
+    recurringRuleId: input.recurring ? new Types.ObjectId() : null,
+    occurrenceIndex: input.recurring ? 0 : null,
+    installment: input.installment ?? null,
+    createdBy: actor,
+    updatedBy: actor,
+  });
+}
+const limits = (month: string, list: Partial<Record<CatKey, string>>) =>
+  budgetLimitsSchema.parse({
+    month,
+    limits: Object.entries(list).map(([k, amount]) => ({ categoryId: cat[k as CatKey], amount })),
+  });
+const line = async (key: CatKey, month = M, user = ayse) =>
+  (await getBudget(user, cakir, month))!.lines.find((l) => l.categoryId === cat[key]);
+
+describe("aylık bütçe", () => {
+  const { from, to } = budgetPeriod(M);
+
+  it("limitler; üst limit alt kategorileri kapsar; bölünmüş işlem kalem bazında; planlı ayrı", async () => {
+    await expense({ date: from, amountMinor: 15_000_00, category: cat.kira, recurring: true });
+    await expense({
+      date: addDays(from, 5),
+      amountMinor: 3_000_00,
+      splits: [
+        { category: cat.aidat, amountMinor: 1_200_00 },
+        { category: cat.keyif, amountMinor: 1_800_00 },
+      ],
+    });
+    await expense({ date: to, amountMinor: 500_00, category: cat.aidat, status: "planned" });
+    expect((await saveBudget(ayse, cakir, limits(M, { ev: "17.000", kira: "15.000" }))).ok).toBe(
+      true,
+    );
+    const b = (await getBudget(ayse, cakir, M))!;
+    expect(b.hasBudget).toBe(true);
+    // Geçmiş ay: tüm günler geçti.
+    expect(b.elapsedDays).toBe(b.totalDays);
+    expect(b.totals.limitMinor).toBe(17_000_00);
+    expect(b.totals.actualMinor).toBe(18_000_00);
+    expect(b.totals.unbudgetedMinor).toBe(1_800_00);
+    expect(await line("ev")).toMatchObject({
+      actualMinor: 16_200_00,
+      plannedMinor: 500_00,
+      forecastMinor: 16_700_00,
+      status: "warning",
+      forecastOver: false,
+    });
+    expect(await line("kira")).toMatchObject({ status: "over", remainingMinor: 0 });
+    expect(await line("keyif")).toMatchObject({ limitMinor: null, actualMinor: 1_800_00 });
+    // Boş limit kaldırılır.
+    await saveBudget(ayse, cakir, limits(M, { ev: "17.000", kira: "" }));
+    expect((await line("kira"))!.limitMinor).toBeNull();
+  });
+
+  it("gizli hesap harcaması hane ayarına göre", async () => {
+    const actor = new Types.ObjectId(emre);
+    const secret = await AccountModel.create({
+      householdId: new Types.ObjectId(cakir),
+      name: "Emre Gizli Test",
+      type: "cash",
+      openingBalanceMinor: 0,
+      openingDate: istanbulDayStart(addDays(from, -10))!,
+      isPrivate: true,
+      ownerUserId: actor,
+      createdBy: actor,
+      updatedBy: actor,
+    });
+    await expense({
+      date: addDays(from, 2),
+      amountMinor: 700_00,
+      category: cat.keyif,
+      account: "Emre Gizli Test",
+    });
+    expect((await line("keyif"))!.actualMinor).toBe(2_500_00);
+    const b = (await getBudget(ayse, cakir, M))!;
+    expect(b.includesHidden).toBe(true);
+    await HouseholdModel.updateOne(
+      { _id: cakir },
+      { $set: { "settings.includePrivateAccountsInTotals": false } },
+    );
+    expect((await line("keyif"))!.actualMinor).toBe(1_800_00);
+    // Sahibi her zaman görür.
+    expect((await line("keyif", M, emre))!.actualMinor).toBe(2_500_00);
+    await HouseholdModel.updateOne(
+      { _id: cakir },
+      { $set: { "settings.includePrivateAccountsInTotals": true } },
+    );
+    expect(secret).toBeTruthy();
+  });
+
+  it("taksit modu: her taksit kendi ayına veya tamamı alış ayına", async () => {
+    const planId = new Types.ObjectId();
+    const next = budgetPeriod(shiftMonth(M, 1));
+    await expense({
+      date: addDays(from, 10),
+      amountMinor: 1_000_00,
+      category: cat.aidat,
+      installment: { planId, index: 1, count: 2 },
+    });
+    await expense({
+      date: addDays(next.from, 10),
+      amountMinor: 1_000_00,
+      category: cat.aidat,
+      installment: { planId, index: 2, count: 2 },
+      status: "planned",
+    });
+    const before = (await line("aidat"))!.actualMinor;
+    await HouseholdModel.updateOne(
+      { _id: cakir },
+      { $set: { "settings.installmentBudgetMode": "purchase_month" } },
+    );
+    expect((await line("aidat"))!.actualMinor).toBe(before + 1_000_00);
+    // Tamamı alış ayında sayıldığı için sonraki ayda görünmez.
+    expect((await line("aidat", shiftMonth(M, 1)))?.actualMinor ?? 0).toBe(0);
+    await HouseholdModel.updateOne(
+      { _id: cakir },
+      { $set: { "settings.installmentBudgetMode": "per_installment" } },
+    );
+    // Her taksit kendi ayında (geçmiş ay olduğu için vadesi gelen taksit gerçekleşmiştir).
+    expect((await line("aidat", shiftMonth(M, 1)))!.actualMinor).toBe(1_000_00);
+  });
+
+  it("bütçe ayı başlangıç günü dönemi kaydırır", async () => {
+    await HouseholdModel.updateOne(
+      { _id: cakir },
+      { $set: { "settings.budgetMonthStartDay": 15 } },
+    );
+    const b = (await getBudget(ayse, cakir, M))!;
+    expect(b.period).toEqual(budgetPeriod(M, 15));
+    // Ayın 1'indeki kira artık önceki bütçe ayında.
+    expect((await line("kira"))?.actualMinor ?? 0).toBe(0);
+    await HouseholdModel.updateOne({ _id: cakir }, { $set: { "settings.budgetMonthStartDay": 1 } });
+  });
+
+  it("önceki aydan kopyala ve önceki ayın harcamalarından oluştur", async () => {
+    const N = shiftMonth(M, 1);
+    expect((await copyPreviousBudget(ayse, cakir, P)).ok).toBe(false);
+    expect((await copyPreviousBudget(ayse, cakir, N)).ok).toBe(true);
+    expect((await getBudget(ayse, cakir, N))!.editor.limits[cat.ev]).toBe(17_000_00);
+    // M'nin harcamaları: Ev kökü 16.200 + taksit 1.000 → 17.200; Keyif 2.500 (gizli dahil).
+    expect((await budgetFromActuals(ayse, cakir, N)).ok).toBe(true);
+    const l = (await BudgetModel.findOne({ householdId: cakir, month: N }).lean())!.limits;
+    const get = (k: CatKey) => l.find((x) => String(x.categoryId) === cat[k])?.amountMinor;
+    expect(get("ev")).toBe(17_200_00);
+    expect(get("keyif")).toBe(2_500_00);
+    expect(get("kira")).toBeUndefined();
+    expect((await budgetFromActuals(ayse, cakir, shiftMonth(M, -5))).ok).toBe(false);
+  });
+
+  it("yetki: izleyici yazamaz; başka hane göremez; geçersiz kategori reddedilir", async () => {
+    expect((await getBudget(zeynep, cakir, M))!.canWrite).toBe(false);
+    expect((await saveBudget(zeynep, cakir, limits(M, { ev: "1" }))).ok).toBe(false);
+    expect(await getBudget(fatma, cakir, M)).toBeNull();
+    const annemler = ids.household("Annemler");
+    expect((await saveBudget(fatma, annemler, limits(M, { ev: "1" }))).ok).toBe(false);
+  });
+});

src/features/budgets/service.ts

@@ -0,0 +1,392 @@
+import "server-only";
+import { Types, type PipelineStage } from "mongoose";
+import { hasHouseholdRole } from "@/features/households/roles";
+import { loadContext, type Ctx } from "@/features/transactions/service";
+import { tr } from "@/i18n/tr";
+import { fail, ok, type ActionResult } from "@/lib/action-result";
+import { BudgetModel } from "@/models/budget";
+import { HouseholdModel } from "@/models/household";
+import { TransactionModel } from "@/models/transaction";
+import type { IconKey, Swatch } from "@/shared/appearance";
+import {
+  budgetPeriod,
+  computeBudget,
+  daysBetween,
+  periodOfDate,
+  roundUpLimit,
+  shiftMonth,
+  type BudgetLine,
+  type BudgetTotals,
+  type CategoryAmounts,
+} from "@/shared/budget";
+import { istanbulDayStart, todayIstanbul } from "@/shared/dates";
+import type { BudgetLimitsForm } from "@/shared/schemas/budget";
+
+/**
+ * Aylık bütçe (Bölüm 6.9). Okuma: viewer; yazma: member.
+ *
+ * Gerçekleşen: dönemdeki gerçekleşmiş (posted) giderler; bölünmüş işlemler kalem bazında.
+ * Planlı: dönemdeki planlı giderler (düzenli işlem tekrarları, gelecek taksitler).
+ * Taksit modu (hane ayarı): her taksit kendi ayına (varsayılan) veya tamamı alış ayına.
+ * Başkasının "yalnızca ben" hesabından giderler hane ayarına göre (yalnızca tutar) sayılır.
+ */
+
+const t = tr.budget;
+const DAY_MS = 86_400_000;
+
+type Settings = {
+  startDay: number;
+  installmentMode: "per_installment" | "purchase_month";
+  includePrivate: boolean;
+};
+
+async function settingsOf(householdId: Types.ObjectId): Promise<Settings> {
+  const h = await HouseholdModel.findById(householdId).select({ settings: 1 }).lean();
+  return {
+    startDay: h?.settings?.budgetMonthStartDay ?? 1,
+    installmentMode: h?.settings?.installmentBudgetMode ?? "per_installment",
+    includePrivate: h?.settings?.includePrivateAccountsInTotals ?? true,
+  };
+}
+
+/** Kategori bazında (kendi) sabit/değişken gerçekleşen ve planlı gider. */
+export async function expenseAmounts(
+  ctx: Ctx,
+  s: Settings,
+  from: string,
+  to: string,
+): Promise<Map<string, CategoryAmounts>> {
+  const start = istanbulDayStart(from)!;
+  const end = new Date(istanbulDayStart(to)!.getTime() + DAY_MS);
+  const base: Record<string, unknown> = {
+    householdId: ctx.m.householdId,
+    type: "expense",
+    deletedAt: null,
+  };
+  if (!s.includePrivate && ctx.hiddenAccountIds.length)
+    base.accountId = { $nin: ctx.hiddenAccountIds };
+
+  const itemsStage: PipelineStage = {
+    $project: {
+      status: 1,
+      fixed: {
+        $or: [{ $ne: ["$recurringRuleId", null] }, { $ne: ["$installment.planId", null] }],
+      },
+      items: {
+        $cond: [
+          { $gt: [{ $size: { $ifNull: ["$splits", []] } }, 0] },
+          "$splits",
+          [{ categoryId: "$categoryId", amountMinor: "$amountMinor" }],
+        ],
+      },
+    },
+  };
+  const group: PipelineStage[] = [
+    itemsStage,
+    { $unwind: "$items" },
+    {
+      $group: {
+        _id: { c: "$items.categoryId", s: "$status", f: "$fixed" },
+        sum: { $sum: "$items.amountMinor" },
+      },
+    },
+  ];
+
+  const match: Record<string, unknown> = {
+    ...base,
+    status: { $in: ["posted", "planned"] },
+    date: { $gte: start, $lt: end },
+  };
+  if (s.installmentMode === "purchase_month") match["installment.planId"] = { $in: [null] };
+  const rows = await TransactionModel.aggregate<{
+    _id: { c: Types.ObjectId | null; s: string; f: boolean };
+    sum: number;
+  }>([{ $match: match }, ...group]);
+
+  const out = new Map<string, CategoryAmounts>();
+  const add = (cat: string, k: keyof CategoryAmounts, v: number) => {
+    const cur = out.get(cat) ?? { fixedMinor: 0, variableMinor: 0, plannedMinor: 0 };
+    cur[k] += v;
+    out.set(cat, cur);
+  };
+  for (const r of rows) {
+    const cat = r._id.c ? String(r._id.c) : "";
+    if (r._id.s === "planned") add(cat, "plannedMinor", r.sum);
+    else add(cat, r._id.f ? "fixedMinor" : "variableMinor", r.sum);
+  }
+
+  // Tamamı alış ayına: ilk taksiti bu dönemde olan planların tüm taksitleri gerçekleşmiş sayılır.
+  if (s.installmentMode === "purchase_month") {
+    const plans = await TransactionModel.aggregate<{
+      _id: Types.ObjectId;
+      first: Date;
+      items: { categoryId: Types.ObjectId | null; amountMinor: number }[][];
+    }>([
+      {
+        $match: {
+          ...base,
+          status: { $in: ["posted", "planned"] },
+          "installment.planId": { $ne: null },
+        },
+      },
+      {
+        $group: {
+          _id: "$installment.planId",
+          first: { $min: "$date" },
+          items: {
+            $push: {
+              $cond: [
+                { $gt: [{ $size: { $ifNull: ["$splits", []] } }, 0] },
+                "$splits",
+                [{ categoryId: "$categoryId", amountMinor: "$amountMinor" }],
+              ],
+            },
+          },
+        },
+      },
+      { $match: { first: { $gte: start, $lt: end } } },
+    ]);
+    for (const p of plans)
+      for (const list of p.items)
+        for (const it of list)
+          add(it.categoryId ? String(it.categoryId) : "", "fixedMinor", it.amountMinor);
+  }
+  return out;
+}
+
+export type BudgetLineView = BudgetLine & { icon: IconKey; color: Swatch; path: string };
+
+export type BudgetView = {
+  month: string;
+  currentMonth: string;
+  period: { from: string; to: string };
+  elapsedDays: number;
+  totalDays: number;
+  lines: BudgetLineView[];
+  totals: BudgetTotals;
+  hasBudget: boolean;
+  /** Limit düzenleyici: etkin gider kategorileri (ağaç sırası) ve mevcut limitler. */
+  editor: {
+    categories: { id: string; name: string; depth: number }[];
+    limits: Record<string, number>;
+  };
+  hasPrevious: boolean;
+  includesHidden: boolean;
+  canWrite: boolean;
+};
+
+function expenseCategories(ctx: Ctx) {
+  return ctx.flatCategories.filter((c) => c.kind === "expense");
+}
+
+export async function getBudget(
+  userId: string,
+  householdId: string,
+  month?: string,
+): Promise<BudgetView | null> {
+  const ctx = await loadContext(userId, householdId, "viewer");
+  if (!ctx) return null;
+  const s = await settingsOf(ctx.m.householdId);
+  const today = todayIstanbul();
+  const currentMonth = periodOfDate(today, s.startDay);
+  const m = month ?? currentMonth;
+  const period = budgetPeriod(m, s.startDay);
+  const totalDays = daysBetween(period.from, period.to);
+  const elapsedDays =
+    today < period.from ? 0 : today > period.to ? totalDays : daysBetween(period.from, today);
+
+  const [doc, prev, amounts] = await Promise.all([
+    BudgetModel.findOne({ householdId: ctx.m.householdId, month: m }).lean(),
+    BudgetModel.exists({
+      householdId: ctx.m.householdId,
+      month: shiftMonth(m, -1),
+      "limits.0": { $exists: true },
+    }),
+    expenseAmounts(ctx, s, period.from, period.to),
+  ]);
+  const limits = new Map((doc?.limits ?? []).map((l) => [String(l.categoryId), l.amountMinor]));
+  const cats = expenseCategories(ctx);
+  // Arşivli kategori yalnızca limiti veya harcaması varsa görünür.
+  const visibleCats = cats.filter((c) => !c.archived || limits.has(c.id) || amounts.has(c.id));
+  const known = new Set(visibleCats.map((c) => c.id));
+  // Kategorisiz / bilinmeyen kategorideki gider "Kategorisiz" satırında toplanır.
+  const orphan = { fixedMinor: 0, variableMinor: 0, plannedMinor: 0 };
+  for (const [id, a] of amounts)
+    if (!known.has(id)) {
+      orphan.fixedMinor += a.fixedMinor;
+      orphan.variableMinor += a.variableMinor;
+      orphan.plannedMinor += a.plannedMinor;
+    }
+  const ORPHAN = "__none__";
+  const inputCats = visibleCats.map((c) => ({
+    id: c.id,
+    parentId: c.parentId,
+    name: c.name,
+    order: c.order,
+  }));
+  if (orphan.fixedMinor + orphan.variableMinor + orphan.plannedMinor > 0) {
+    inputCats.push({ id: ORPHAN, parentId: null, name: t.uncategorized, order: 1e9 });
+    amounts.set(ORPHAN, orphan);
+  }
+  const { lines, totals } = computeBudget({
+    categories: inputCats,
+    limits,
+    amounts,
+    elapsedDays,
+    totalDays,
+  });
+  const editorCats = cats.filter((c) => !c.archived);
+  // Düzenleyici için ağaç sırası ve derinlik (tüm etkin kategoriler, limit 0 ile).
+  const ordered = computeBudget({
+    categories: editorCats.map((c) => ({
+      id: c.id,
+      parentId: c.parentId,
+      name: c.name,
+      order: c.order,
+    })),
+    limits: new Map(editorCats.map((c) => [c.id, 0])),
+    amounts: new Map(),
+    elapsedDays: 0,
+    totalDays: 1,
+  }).lines;
+
+  return {
+    month: m,
+    currentMonth,
+    period,
+    elapsedDays,
+    totalDays,
+    lines: lines.map((l) => {
+      const c = ctx.categoryMap.get(l.categoryId);
+      return {
+        ...l,
+        icon: (c?.icon ?? "tag") as IconKey,
+        color: (c?.color ?? "slate") as Swatch,
+        path: c?.path ?? l.name,
+      };
+    }),
+    totals,
+    hasBudget: limits.size > 0,
+    editor: {
+      categories: ordered.map((l) => ({ id: l.categoryId, name: l.name, depth: l.depth })),
+      limits: Object.fromEntries(limits),
+    },
+    hasPrevious: Boolean(prev),
+    includesHidden: s.includePrivate && ctx.hiddenAccountIds.length > 0,
+    canWrite: hasHouseholdRole(ctx.m.role, "member"),
+  };
+}
+
+async function writeLimits(
+  ctx: Ctx,
+  actorId: string,
+  month: string,
+  limits: { categoryId: string; amountMinor: number }[],
+): Promise<ActionResult> {
+  const valid = new Set(
+    expenseCategories(ctx)
+      .filter((c) => !c.archived)
+      .map((c) => c.id),
+  );
+  const seen = new Set<string>();
+  for (const l of limits) {
+    if (!valid.has(l.categoryId) || seen.has(l.categoryId)) return fail(t.errors.category);
+    seen.add(l.categoryId);
+  }
+  const actor = new Types.ObjectId(actorId);
+  await BudgetModel.updateOne(
+    { householdId: ctx.m.householdId, month },
+    {
+      $set: {
+        limits: limits.map((l) => ({
+          categoryId: new Types.ObjectId(l.categoryId),
+          amountMinor: l.amountMinor,
+        })),
+        updatedBy: actor,
+      },
+      $setOnInsert: { createdBy: actor },
+    },
+    { upsert: true },
+  );
+  return ok(undefined);
+}
+
+export async function saveBudget(
+  actorId: string,
+  householdId: string,
+  input: BudgetLimitsForm,
+): Promise<ActionResult> {
+  const ctx = await loadContext(actorId, householdId, "member");
+  if (!ctx) return fail(tr.common.unauthorized);
+  return writeLimits(ctx, actorId, input.month, input.limits);
+}
+
+/** Önceki ayın limitlerini kopyalar (arşivlenmiş kategoriler atlanır). */
+export async function copyPreviousBudget(
+  actorId: string,
+  householdId: string,
+  month: string,
+): Promise<ActionResult> {
+  const ctx = await loadContext(actorId, householdId, "member");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const prev = await BudgetModel.findOne({
+    householdId: ctx.m.householdId,
+    month: shiftMonth(month, -1),
+  }).lean();
+  if (!prev?.limits.length) return fail(t.errors.noPrevious);
+  const active = new Set(
+    expenseCategories(ctx)
+      .filter((c) => !c.archived)
+      .map((c) => c.id),
+  );
+  return writeLimits(
+    ctx,
+    actorId,
+    month,
+    prev.limits
+      .map((l) => ({ categoryId: String(l.categoryId), amountMinor: l.amountMinor }))
+      .filter((l) => active.has(l.categoryId)),
+  );
+}
+
+/**
+ * Önceki ayın gerçekleşen giderlerinden limit: ana kategori (kök) bazında toplam, 100 TL'ye
+ * yukarı yuvarlanır. Kategorisiz gider atlanır.
+ */
+export async function budgetFromActuals(
+  actorId: string,
+  householdId: string,
+  month: string,
+): Promise<ActionResult> {
+  const ctx = await loadContext(actorId, householdId, "member");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const s = await settingsOf(ctx.m.householdId);
+  const period = budgetPeriod(shiftMonth(month, -1), s.startDay);
+  const amounts = await expenseAmounts(ctx, s, period.from, period.to);
+  const cats = expenseCategories(ctx);
+  const byId = new Map(cats.map((c) => [c.id, c]));
+  const rootOf = (id: string) => {
+    let cur = byId.get(id);
+    let guard = 0;
+    while (cur?.parentId && byId.has(cur.parentId) && guard++ < 6) cur = byId.get(cur.parentId);
+    return cur;
+  };
+  const totals = new Map<string, number>();
+  for (const [id, a] of amounts) {
+    const root = rootOf(id);
+    if (!root || root.archived) continue;
+    totals.set(root.id, (totals.get(root.id) ?? 0) + a.fixedMinor + a.variableMinor);
+  }
+  const limits = [...totals]
+    .filter(([, v]) => v > 0)
+    .map(([categoryId, v]) => ({ categoryId, amountMinor: roundUpLimit(v) }));
+  if (!limits.length) return fail(t.errors.noPreviousSpending);
+  return writeLimits(ctx, actorId, month, limits);
+}
+
+/** Dashboard uyarısı: bu ayın %80'i geçilmiş veya aşılmış limitli kategori sayısı. */
+export async function countBudgetWarnings(userId: string, householdId: string): Promise<number> {
+  const b = await getBudget(userId, householdId);
+  if (!b?.hasBudget) return 0;
+  return b.lines.filter((l) => l.status === "warning" || l.status === "over").length;
+}

src/i18n/tr.ts

@@ -804,6 +804,77 @@ export const tr = {
       noAccountForGift: "Hediye hareketinde hesap seçilmez.",
     },
   },
+  budget: {
+    title: "Bütçe",
+    description:
+      "Aylık kategori limitleri, gerçekleşen harcama ve ay sonu tahmini. Üst kategori limiti alt kategorileri kapsar.",
+    prevMonth: "Önceki ay",
+    nextMonth: "Sonraki ay",
+    thisMonth: "Bu ay",
+    period: (from: string, to: string) => `${from} – ${to}`,
+    totals: {
+      limit: "Bütçe",
+      actual: "Harcanan",
+      remaining: "Kalan",
+      over: "Aşım",
+      forecast: "Ay sonu tahmini",
+      planned: (amount: string) => `Planlı: ${amount}`,
+      unbudgeted: "Bütçesiz harcama",
+      monthProgress: (day: number, total: number, pct: string) =>
+        `Ayın ${day}/${total}. günü (%${pct}).`,
+    },
+    status: {
+      ok: "Yolunda",
+      warning: "%80 geçildi",
+      over: "Limit aşıldı",
+      full: "Limit doldu",
+      none: "Limitsiz",
+      covered: "Üst kategori limitinde",
+      forecastOver: "Tahmin limiti aşıyor",
+    },
+    line: {
+      ofLimit: (actual: string, limit: string) => `${actual} / ${limit}`,
+      remaining: (amount: string) => `${amount} kaldı`,
+      over: (amount: string) => `${amount} aşıldı`,
+      forecast: (amount: string) => `Tahmin ${amount}`,
+      planned: (amount: string) => `Planlı ${amount}`,
+    },
+    uncategorized: "Kategorisiz",
+    empty: "Bu ay için bütçe yok.",
+    emptyHint:
+      "Limitleri elle girebilir, önceki ayın bütçesini kopyalayabilir veya önceki ayın harcamalarından oluşturabilirsiniz.",
+    noSpending: "Bu ay henüz gider yok.",
+    edit: "Limitleri düzenle",
+    editTitle: (month: string) => `Bütçe limitleri · ${month}`,
+    editHint:
+      "Boş bırakılan kategori limitsizdir. Alt kategori limiti üst kategorinin içinde bir alt sınırdır.",
+    editTotal: (amount: string) => `Toplam bütçe: ${amount}`,
+    copyPrevious: "Önceki aydan kopyala",
+    fromActuals: "Önceki ayın harcamalarından oluştur",
+    fromActualsHint:
+      "Ana kategorilerin önceki ay harcaması 100 TL'ye yukarı yuvarlanarak limit olur.",
+    replaceTitle: "Mevcut limitler değiştirilsin mi?",
+    replaceDescription: "Bu ayın tüm limitleri seçilen kaynakla değiştirilir.",
+    replace: "Değiştir",
+    includesHidden:
+      "Hane ayarı gereği diğer üyelerin gizli hesaplarından yapılan harcamalar dahil.",
+    warnings: (n: number) => `${n} kategoride bütçenin %80'i geçildi veya limit aşıldı.`,
+    goToBudget: "Bütçeye git",
+    toast: {
+      saved: "Bütçe kaydedildi.",
+      copied: "Önceki ayın limitleri kopyalandı.",
+      created: "Limitler önceki ayın harcamalarından oluşturuldu.",
+    },
+    errors: {
+      noPrevious: "Önceki ay için bütçe yok.",
+      noPreviousSpending: "Önceki ayda gider yok.",
+      category: "Geçersiz veya arşivlenmiş kategori.",
+    },
+    validation: {
+      month: "Geçersiz ay",
+      category: "Kategori seçin",
+    },
+  },
   prices: {
     title: "Fiyat tablosu",
     description:

src/models/budget.ts

@@ -0,0 +1,32 @@
+import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
+
+/**
+ * Aylık bütçe (Bölüm 6.9): hane × bütçe ayı ("YYYY-MM") başına kategori limitleri.
+ * Ayın sınırları hane ayarı `budgetMonthStartDay`'e göre hesaplanır (belgede saklanmaz).
+ */
+const limitSchema = new Schema(
+  {
+    categoryId: { type: Schema.Types.ObjectId, required: true },
+    amountMinor: { type: Number, required: true, min: 0 },
+  },
+  { _id: false },
+);
+
+const budgetSchema = new Schema(
+  {
+    householdId: { type: Schema.Types.ObjectId, required: true },
+    month: { type: String, required: true, match: /^\d{4}-(0[1-9]|1[0-2])$/ },
+    limits: { type: [limitSchema], default: [] },
+    seedRef: { type: String, default: null },
+    createdBy: { type: Schema.Types.ObjectId, required: true },
+    updatedBy: { type: Schema.Types.ObjectId, required: true },
+  },
+  { timestamps: true, collection: "budgets" },
+);
+
+budgetSchema.index({ householdId: 1, month: 1 }, { unique: true });
+
+export type Budget = InferSchemaType<typeof budgetSchema>;
+
+export const BudgetModel: Model<Budget> =
+  (models.Budget as Model<Budget> | undefined) ?? model<Budget>("Budget", budgetSchema);

src/shared/budget.test.ts

@@ -0,0 +1,139 @@
+import { describe, expect, it } from "vitest";
+import {
+  budgetPeriod,
+  computeBudget,
+  daysBetween,
+  forecast,
+  periodOfDate,
+  roundUpLimit,
+  shiftMonth,
+  statusOf,
+  type CategoryAmounts,
+} from "./budget";
+
+describe("bütçe dönemi", () => {
+  it("takvim ayı ve 15'inde başlayan ay", () => {
+    expect(budgetPeriod("2026-11")).toEqual({ from: "2026-11-01", to: "2026-11-30" });
+    expect(budgetPeriod("2026-12", 15)).toEqual({ from: "2026-12-15", to: "2027-01-14" });
+    expect(budgetPeriod("2027-01", 28)).toEqual({ from: "2027-01-28", to: "2027-02-27" });
+    expect(periodOfDate("2026-11-14", 15)).toBe("2026-10");
+    expect(periodOfDate("2026-11-15", 15)).toBe("2026-11");
+    expect(periodOfDate("2027-01-03", 15)).toBe("2026-12");
+    expect(periodOfDate("2026-11-30")).toBe("2026-11");
+    expect(shiftMonth("2026-12", 1)).toBe("2027-01");
+    expect(shiftMonth("2026-01", -1)).toBe("2025-12");
+    expect(daysBetween("2026-11-01", "2026-11-30")).toBe(30);
+    expect(daysBetween("2026-12-15", "2027-01-14")).toBe(31);
+  });
+
+  it("durum eşikleri %80 ve %100", () => {
+    expect(statusOf(79_99, 100_00)).toBe("ok");
+    expect(statusOf(80_00, 100_00)).toBe("warning");
+    expect(statusOf(100_00, 100_00)).toBe("over");
+    expect(statusOf(5, null)).toBe("none");
+    expect(statusOf(1, 0)).toBe("over");
+  });
+
+  it("ay sonu tahmini: sabit + planlı + değişken tempo", () => {
+    const a: CategoryAmounts = {
+      fixedMinor: 1_000_00,
+      variableMinor: 3_000_00,
+      plannedMinor: 500_00,
+    };
+    // 10/30 gün geçti: değişken 3.000 → 9.000
+    expect(forecast(a, 10, 30)).toBe(10_500_00);
+    expect(forecast(a, 30, 30)).toBe(4_500_00);
+    expect(forecast(a, 0, 30)).toBe(1_500_00);
+    expect(roundUpLimit(1_234_56)).toBe(1_300_00);
+    expect(roundUpLimit(1_200_00)).toBe(1_200_00);
+  });
+});
+
+describe("bütçe toplama", () => {
+  const categories = [
+    { id: "market", parentId: null, name: "Market", order: 1 },
+    { id: "faturalar", parentId: null, name: "Faturalar", order: 2 },
+    { id: "elektrik", parentId: "faturalar", name: "Elektrik", order: 1 },
+    { id: "su", parentId: "faturalar", name: "Su", order: 2 },
+    { id: "eglence", parentId: null, name: "Eğlence", order: 3 },
+    { id: "sinema", parentId: "eglence", name: "Sinema", order: 1 },
+    { id: "giyim", parentId: null, name: "Giyim", order: 4 },
+  ];
+  const amt = (variable: number, fixed = 0, planned = 0): CategoryAmounts => ({
+    fixedMinor: fixed,
+    variableMinor: variable,
+    plannedMinor: planned,
+  });
+
+  it("üst limit alt kategorileri kapsar; alt limit iki kez sayılmaz; bütçesiz harcama", () => {
+    const r = computeBudget({
+      categories,
+      limits: new Map([
+        ["market", 10_000_00],
+        ["faturalar", 3_000_00],
+        ["elektrik", 1_500_00],
+        ["sinema", 500_00],
+      ]),
+      amounts: new Map([
+        ["market", amt(8_500_00)],
+        ["elektrik", amt(0, 1_600_00)],
+        ["su", amt(0, 400_00, 300_00)],
+        ["faturalar", amt(100_00)],
+        ["sinema", amt(200_00)],
+        ["eglence", amt(300_00)],
+        ["giyim", amt(1_000_00)],
+      ]),
+      elapsedDays: 30,
+      totalDays: 30,
+    });
+    // Toplam limit: market + faturalar + sinema (elektrik faturaların içinde).
+    expect(r.totals.limitMinor).toBe(13_500_00);
+    expect(r.totals.actualMinor).toBe(12_100_00);
+    // Bütçesiz: eğlencenin kendi harcaması + giyim.
+    expect(r.totals.unbudgetedMinor).toBe(1_300_00);
+    const line = (id: string) => r.lines.find((l) => l.categoryId === id)!;
+    expect(line("faturalar")).toMatchObject({
+      actualMinor: 2_100_00,
+      plannedMinor: 300_00,
+      status: "ok",
+      ratioBp: 7000,
+    });
+    expect(line("elektrik")).toMatchObject({ status: "over", remainingMinor: -100_00 });
+    expect(line("market").status).toBe("warning");
+    expect(line("eglence")).toMatchObject({
+      limitMinor: null,
+      actualMinor: 500_00,
+      status: "none",
+    });
+    // Sıra: ağaç sırası, derinlik.
+    expect(r.lines.map((l) => `${l.depth}:${l.categoryId}`)).toEqual([
+      "0:market",
+      "0:faturalar",
+      "1:elektrik",
+      "1:su",
+      "0:eglence",
+      "1:sinema",
+      "0:giyim",
+    ]);
+  });
+
+  it("tahmin limiti aşıyor uyarısı; limit yoksa durum none", () => {
+    const r = computeBudget({
+      categories,
+      limits: new Map([["market", 10_000_00]]),
+      amounts: new Map([["market", amt(4_000_00)]]),
+      elapsedDays: 10,
+      totalDays: 30,
+    });
+    expect(r.totals).toMatchObject({ status: "ok", forecastMinor: 12_000_00, forecastOver: true });
+    const empty = computeBudget({
+      categories,
+      limits: new Map(),
+      amounts: new Map(),
+      elapsedDays: 1,
+      totalDays: 30,
+    });
+    expect(empty.totals.status).toBe("none");
+    expect(empty.lines).toHaveLength(0);
+  });
+});

src/shared/budget.ts

@@ -0,0 +1,217 @@
+import { addDays, addMonths } from "./recurrence";
+
+/**
+ * Aylık bütçe hesap motoru (Bölüm 6.9). Tutarlar kuruş, tarihler İstanbul günü "YYYY-MM-DD".
+ *
+ * Bütçe ayı hane ayarı `budgetMonthStartDay` ile başlar (Faz 0): başlangıç günü 15 ise
+ * "2026-11" dönemi 15 Kasım – 14 Aralık'tır; 1 ise takvim ayıdır.
+ *
+ * Limitler (Faz 10 kararı): her gider kategorisine verilebilir. Üst kategori limiti alt
+ * kategorilerin harcamasını da kapsar; alt kategori limiti üstün içinde bir alt sınırdır ve
+ * toplam bütçede iki kez sayılmaz.
+ */
+
+export const WARNING_BP = 8_000;
+export const OVER_BP = 10_000;
+
+/** "YYYY-MM" dönemi: ilk ve son gün (ikisi de dahil). */
+export function budgetPeriod(month: string, startDay = 1): { from: string; to: string } {
+  const from = `${month}-${String(startDay).padStart(2, "0")}`;
+  const to = addDays(addMonths(from, 1, startDay), -1);
+  return { from, to };
+}
+
+/** Tarihin düştüğü bütçe ayı. */
+export function periodOfDate(date: string, startDay = 1): string {
+  const day = Number(date.slice(8, 10));
+  const month = date.slice(0, 7);
+  return day >= startDay ? month : addMonths(`${month}-01`, -1).slice(0, 7);
+}
+
+export function shiftMonth(month: string, n: number): string {
+  return addMonths(`${month}-01`, n).slice(0, 7);
+}
+
+/** İki gün arasındaki gün sayısı (ikisi de dahil). */
+export function daysBetween(from: string, to: string): number {
+  const ms = Date.parse(`${to}T00:00:00Z`) - Date.parse(`${from}T00:00:00Z`);
+  return Math.round(ms / 86_400_000) + 1;
+}
+
+export type BudgetStatus = "none" | "ok" | "warning" | "over";
+
+export function statusOf(actualMinor: number, limitMinor: number | null): BudgetStatus {
+  if (limitMinor === null) return "none";
+  if (limitMinor <= 0) return actualMinor > 0 ? "over" : "ok";
+  const bp = (actualMinor * 10_000) / limitMinor;
+  return bp >= OVER_BP ? "over" : bp >= WARNING_BP ? "warning" : "ok";
+}
+
+export type BudgetCategoryInput = {
+  id: string;
+  parentId: string | null;
+  name: string;
+  order: number;
+};
+
+/** Kategori bazında kendi (alt kategoriler hariç) tutarlar. */
+export type CategoryAmounts = {
+  /** Düzenli işlem veya taksitten gelen gerçekleşmiş gider (tempo tahminine katılmaz). */
+  fixedMinor: number;
+  /** Diğer gerçekleşmiş gider. */
+  variableMinor: number;
+  /** Dönemin kalanındaki planlı (henüz gerçekleşmemiş) gider. */
+  plannedMinor: number;
+};
+
+export type BudgetLine = {
+  categoryId: string;
+  name: string;
+  depth: number;
+  limitMinor: number | null;
+  /** Kendi limiti yok ama bir üst kategorinin limiti kapsıyor. */
+  covered: boolean;
+  /** Alt kategoriler dahil gerçekleşen. */
+  actualMinor: number;
+  plannedMinor: number;
+  forecastMinor: number;
+  remainingMinor: number | null;
+  ratioBp: number | null;
+  status: BudgetStatus;
+  /** Tahmin limiti aşıyor (henüz aşılmamış olsa da). */
+  forecastOver: boolean;
+};
+
+export type BudgetTotals = {
+  limitMinor: number;
+  actualMinor: number;
+  plannedMinor: number;
+  forecastMinor: number;
+  remainingMinor: number;
+  /** Hiçbir limitin kapsamadığı gerçekleşen gider. */
+  unbudgetedMinor: number;
+  ratioBp: number | null;
+  status: BudgetStatus;
+  forecastOver: boolean;
+};
+
+/**
+ * Ay sonu tahmini: sabit giderler olduğu gibi + kalan planlı giderler + değişken giderin
+ * şimdiye kadarki günlük hızıyla ay sonuna yansıtılması. Geçmiş ayda tahmin = gerçekleşen;
+ * gelecek ayda yalnızca planlı.
+ */
+export function forecast(a: CategoryAmounts, elapsedDays: number, totalDays: number): number {
+  const variable =
+    elapsedDays <= 0
+      ? 0
+      : elapsedDays >= totalDays
+        ? a.variableMinor
+        : Math.round((a.variableMinor * totalDays) / elapsedDays);
+  return a.fixedMinor + a.plannedMinor + variable;
+}
+
+export function computeBudget(input: {
+  categories: BudgetCategoryInput[];
+  limits: Map<string, number>;
+  amounts: Map<string, CategoryAmounts>;
+  elapsedDays: number;
+  totalDays: number;
+}): { lines: BudgetLine[]; totals: BudgetTotals } {
+  const { categories, limits, amounts, elapsedDays, totalDays } = input;
+  const byId = new Map(categories.map((c) => [c.id, c]));
+  const children = new Map<string, BudgetCategoryInput[]>();
+  const roots: BudgetCategoryInput[] = [];
+  for (const c of categories) {
+    if (c.parentId && byId.has(c.parentId)) {
+      const list = children.get(c.parentId) ?? [];
+      list.push(c);
+      children.set(c.parentId, list);
+    } else roots.push(c);
+  }
+  const sort = (list: BudgetCategoryInput[]) =>
+    list.sort((a, b) => a.order - b.order || a.name.localeCompare(b.name, "tr"));
+  const zero: CategoryAmounts = { fixedMinor: 0, variableMinor: 0, plannedMinor: 0 };
+
+  // Alt ağaç toplamları.
+  const subtree = new Map<string, CategoryAmounts>();
+  const sumOf = (c: BudgetCategoryInput, seen: Set<string>): CategoryAmounts => {
+    if (seen.has(c.id)) return zero;
+    seen.add(c.id);
+    const own = amounts.get(c.id) ?? zero;
+    const total = { ...own };
+    for (const k of children.get(c.id) ?? []) {
+      const s = sumOf(k, seen);
+      total.fixedMinor += s.fixedMinor;
+      total.variableMinor += s.variableMinor;
+      total.plannedMinor += s.plannedMinor;
+    }
+    subtree.set(c.id, total);
+    return total;
+  };
+  const seen = new Set<string>();
+  for (const r of roots) sumOf(r, seen);
+
+  const lines: BudgetLine[] = [];
+  let limitTotal = 0;
+  let unbudgeted = 0;
+  const walk = (list: BudgetCategoryInput[], depth: number, covered: boolean) => {
+    for (const c of sort(list)) {
+      const limit = limits.get(c.id) ?? null;
+      const s = subtree.get(c.id) ?? zero;
+      const own = amounts.get(c.id) ?? zero;
+      if (limit !== null && !covered) limitTotal += limit;
+      const isCovered = covered || limit !== null;
+      if (!isCovered) unbudgeted += own.fixedMinor + own.variableMinor;
+      const actual = s.fixedMinor + s.variableMinor;
+      const fc = forecast(s, elapsedDays, totalDays);
+      if (limit !== null || actual > 0 || s.plannedMinor > 0) {
+        lines.push({
+          categoryId: c.id,
+          name: c.name,
+          depth,
+          limitMinor: limit,
+          covered: limit === null && covered,
+          actualMinor: actual,
+          plannedMinor: s.plannedMinor,
+          forecastMinor: fc,
+          remainingMinor: limit === null ? null : limit - actual,
+          ratioBp: limit && limit > 0 ? Math.round((actual * 10_000) / limit) : null,
+          status: statusOf(actual, limit),
+          forecastOver: limit !== null && fc > limit,
+        });
+      }
+      walk(children.get(c.id) ?? [], depth + 1, isCovered);
+    }
+  };
+  walk(roots, 0, false);
+
+  let actual = 0;
+  let planned = 0;
+  let fc = 0;
+  for (const r of roots) {
+    const s = subtree.get(r.id) ?? zero;
+    actual += s.fixedMinor + s.variableMinor;
+    planned += s.plannedMinor;
+    fc += forecast(s, elapsedDays, totalDays);
+  }
+  const hasLimit = limits.size > 0;
+  return {
+    lines,
+    totals: {
+      limitMinor: limitTotal,
+      actualMinor: actual,
+      plannedMinor: planned,
+      forecastMinor: fc,
+      remainingMinor: limitTotal - actual,
+      unbudgetedMinor: unbudgeted,
+      ratioBp: limitTotal > 0 ? Math.round((actual * 10_000) / limitTotal) : null,
+      status: hasLimit ? statusOf(actual, limitTotal) : "none",
+      forecastOver: hasLimit && fc > limitTotal,
+    },
+  };
+}
+
+/** Limit önerisi için yukarı yuvarlama (100 TL'lik adım). */
+export function roundUpLimit(minor: number, stepMinor = 100_00): number {
+  return Math.ceil(minor / stepMinor) * stepMinor;
+}

src/shared/schemas/budget.ts

@@ -0,0 +1,29 @@
+import { z } from "zod";
+import { tr } from "../../i18n/tr";
+import { nonNegativeMoneySchema } from "./account";
+
+/** Bütçe ayı "YYYY-MM". */
+export const budgetMonthSchema = z
+  .string()
+  .regex(/^\d{4}-(0[1-9]|1[0-2])$/, tr.budget.validation.month);
+
+/**
+ * Limit formu: kategori → tutar metni. Boş veya 0 limit kaldırılır (kategori bütçesiz olur).
+ */
+export const budgetLimitsSchema = z.object({
+  month: budgetMonthSchema,
+  limits: z
+    .array(
+      z.object({
+        categoryId: z.string().regex(/^[a-f0-9]{24}$/i, tr.budget.validation.category),
+        amount: nonNegativeMoneySchema,
+      }),
+    )
+    .max(500)
+    .transform((list) =>
+      list
+        .filter((l) => l.amount > 0)
+        .map((l) => ({ categoryId: l.categoryId, amountMinor: l.amount })),
+    ),
+});
+export type BudgetLimitsForm = z.output<typeof budgetLimitsSchema>;