feat: интерактивный установщик install.sh (Docker / Ubuntu, админ, БД)

Co-authored-by: Cursor <cursoragent@cursor.com>

postgres/init/06_loyalty_promo.sql

@@ -0,0 +1,28 @@
+-- Лояльность и промокоды
+ALTER TABLE users ADD COLUMN IF NOT EXISTS loyalty_points INTEGER NOT NULL DEFAULT 0
+  CHECK (loyalty_points >= 0);
+
+CREATE TABLE IF NOT EXISTS promo_codes (
+  id SERIAL PRIMARY KEY,
+  code TEXT NOT NULL UNIQUE,
+  description TEXT NOT NULL DEFAULT '',
+  discount_type TEXT NOT NULL CHECK (discount_type IN ('percent', 'fixed')),
+  discount_value INTEGER NOT NULL CHECK (discount_value > 0),
+  starts_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  expires_at TIMESTAMPTZ NOT NULL,
+  min_order_cents INTEGER NOT NULL DEFAULT 0 CHECK (min_order_cents >= 0),
+  max_uses INTEGER CHECK (max_uses IS NULL OR max_uses > 0),
+  use_count INTEGER NOT NULL DEFAULT 0 CHECK (use_count >= 0),
+  active BOOLEAN NOT NULL DEFAULT true,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_promo_codes_active ON promo_codes (active, expires_at);
+
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS subtotal_cents INTEGER;
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS discount_cents INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS promo_code_id INTEGER REFERENCES promo_codes(id);
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS loyalty_points_used INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE orders ADD COLUMN IF NOT EXISTS loyalty_points_earned INTEGER NOT NULL DEFAULT 0;
+
+UPDATE orders SET subtotal_cents = total_cents WHERE subtotal_cents IS NULL;