Search live purchase offers for wine, scoped to the user's marketplace region.

This is the end of the sommelier flow — call it once you have collected the user's preferences (see the /sommelier prompt). It always returns retail OFFERS (never abstract products): every result is a real listing from a shop with a price and a purchase link.

IMPORTANT:

• query MUST be English space-separated keywords, NO commas/prepositions. Use "" if the user specified no wine characteristics. Apply semantic translation (e.g. "шампанское" → "Champagne"; "steak" → "red tannic bold Cabernet Sauvignon"). NEVER include a city, price, currency, shop name, or the word "wine".

• price_min and price_max are REQUIRED. If the user named a number with price intent, use it exactly. Otherwise map cheap/mid/premium to the t1/t2/max thresholds from get_user_region. For a range ("от 20 до 50") set BOTH bounds — never drop the lower one.

• price_currency is REQUIRED: the currency you determined in get_user_region (STEP 1), unless the user explicitly named a different one.

• vintage: set to the exact year AND also include that year in query whenever the user names a specific year. Omit if no year was mentioned.

• shop_names: only when the user named a retailer — pass the exact "Name (ID)" strings returned by search_shops (call search_shops FIRST).

• Returns a preformatted, ready-to-display list of offers.

Args: query: English space-separated wine keywords (may be ""). price_min: Minimum price (usually 0.01 unless a lower bound was given). price_max: Maximum price. price_currency: ISO currency code (e.g. "EUR", "JPY") — see get_user_region. shop_names: Up to 5 "Name (ID)" strings from search_shops, or omit. vintage: Specific vintage year, or omit if none.