Mumbai, April 2 The rupee logged one of its steepest single-day gains in many years and closed 152 paise higher at 93.18 against the US dollar on Thursday after the Reserve Bank stepped in with a slew of measures to restrict banks from onshore forward markets.The domestic unit, however, remained under pressure due to the unabated withdrawal of foreign capital, a strengthening dollar, and rising crude oil prices amid a volatile geopolitical situation, forex analysts said.At the interbank foreign exchange, the rupee opened at 94.62 and registered a sharp single-day surge of 188 paise to touch an intra-day high of 92.82 against the greenback. At the end of the session, the rupee was quoted at 93.18 against the dollar, higher by 152...