KYIV — Without electricity for 12 hours a day, the fridge is no longer any use. But it’s a stable minus 10 degrees Celsius on the balcony, so I store my food there.   Outside today you’ll find chicken soup, my favorite vegetable salad and even my birthday cake — all staying fresh in the biting chill. This is the latest terror the Russians have inflicted on our capital — during the cruelest winter since their all-out invasion began in February 2022. They have smashed our energy grids and central