In an expansive decision reversing a Bronx Supreme Court judge, a state appeals court has reinstated a jury-trial finding that a former Montefiore Medical Center employee was battered on the job with a telephone handset. The panel also has tossed aside the judge's major reduction of the jury's $6 million total damages verdict to $523,805, deciding instead that she can take home $2.5 million, if she chooses, and the panel ruled that the employee is due a new trial on her gender discrimination claims and prayer for punitive damages.