A 58-year-old woman from urban Delhi attends a diabetes screening camp. She is a homemaker with a BMI of 31.2 kg/m². She has been sedentary for the past 10 years due to knee arthritis. Fasting blood glucose is 118 mg/dL, and 2-hour post-glucose load value is 165 mg/dL. She denies family history of diabetes. What is her current glycemic status, and which epidemiological intervention would be most cost-effective for her?