feat: minibar — category dropdown, учёт остатков (приходы/списания/инвентаризация/отчёт)

- MinibarSettingsPage: поле категории → выпадающий список с существующими + «Новая...»
- Кнопка «Учёт и остатки» ведёт на /settings/minibar/stock
- MinibarStockPage: 5 вкладок — Остатки, Приходы, Списания, Инвентаризация, Отчёт
- api.ts: добавлены методы и типы для stock/receipts/writeoffs/inventory/report

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/migrations/063_minibar_stock.sql

@@ -0,0 +1,64 @@
+CREATE TABLE minibar_stock (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  hotel_id UUID NOT NULL REFERENCES hotels(id) ON DELETE CASCADE,
+  item_id UUID NOT NULL REFERENCES minibar_items(id) ON DELETE CASCADE,
+  quantity NUMERIC(10,3) NOT NULL DEFAULT 0,
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE(hotel_id, item_id)
+);
+
+CREATE TABLE minibar_receipts (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  hotel_id UUID NOT NULL REFERENCES hotels(id) ON DELETE CASCADE,
+  supplier TEXT,
+  notes TEXT,
+  created_by UUID REFERENCES users(id),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE minibar_receipt_items (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  receipt_id UUID NOT NULL REFERENCES minibar_receipts(id) ON DELETE CASCADE,
+  item_id UUID NOT NULL REFERENCES minibar_items(id),
+  quantity NUMERIC(10,3) NOT NULL,
+  cost_price NUMERIC(10,2)
+);
+
+CREATE TABLE minibar_writeoffs (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  hotel_id UUID NOT NULL REFERENCES hotels(id) ON DELETE CASCADE,
+  reason TEXT NOT NULL,
+  notes TEXT,
+  created_by UUID REFERENCES users(id),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE minibar_writeoff_items (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  writeoff_id UUID NOT NULL REFERENCES minibar_writeoffs(id) ON DELETE CASCADE,
+  item_id UUID NOT NULL REFERENCES minibar_items(id),
+  quantity NUMERIC(10,3) NOT NULL
+);
+
+CREATE TABLE minibar_inventory_checks (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  hotel_id UUID NOT NULL REFERENCES hotels(id) ON DELETE CASCADE,
+  checked_at DATE NOT NULL DEFAULT CURRENT_DATE,
+  notes TEXT,
+  is_complete BOOLEAN NOT NULL DEFAULT false,
+  created_by UUID REFERENCES users(id),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE minibar_inventory_items (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  check_id UUID NOT NULL REFERENCES minibar_inventory_checks(id) ON DELETE CASCADE,
+  item_id UUID NOT NULL REFERENCES minibar_items(id),
+  expected_qty NUMERIC(10,3) NOT NULL DEFAULT 0,
+  actual_qty NUMERIC(10,3) NOT NULL DEFAULT 0
+);
+
+CREATE INDEX ON minibar_stock(hotel_id);
+CREATE INDEX ON minibar_receipts(hotel_id);
+CREATE INDEX ON minibar_writeoffs(hotel_id);
+CREATE INDEX ON minibar_inventory_checks(hotel_id);