A 53-year-old patient complains of shortness of breath during moderate physical exertion and cough with expectoration of a small amount of mucous or mucopurulent sputum. According to the patient's medical history, she has been smoking since the age of 15, as an adult she usually smokes 1 pack per day. She notes deterioration of her condition 3-4 times a year, which requires prescription of antibiotics. Objectively, the following is observed: body temperature 36.4°C, respiratory rate 20/min, pulse 78/min, blood pressure 130/85 mm Hg, the patient is hypersthenic. Percussion produces a bandbox sound over the lungs. Auscultation detects harsh and mildly weakened respiration and scattered dry crackles, the heart sounds are muffled and rhythmic. No pathology was detected in organs of the abdominal cavity. What is the most likely diagnosis in this case?