This study will evaluate the effects of oral semaglutide in combination with topical corticosteroid/calcipotriol on clinical outcomes and metabolic inflammation in patients with plaque psoriasis and overweight/obesity and/or type 2 diabetes mellitus. A total of 62 participants will be randomized to receive either semaglutide plus topical corticosteroid/calcipotriol or placebo plus topical corticosteroid/calcipotriol for 12 weeks. Clinical efficacy will be assessed using the Psoriasis Area and Severity Index (PASI), and quality of life will be evaluated using DLQI, PROMIS-29, and EQ-5D-5L. Systemic inflammatory markers will also be measured to assess metabolic inflammation.