<https://s.mj.run/d6_ceZCGxwU> Create a flat design illustration of a happy terrier-like dog with a wiry, textured coat and expressive eyes, wearing a purple harness with a subtle pattern. The dog should have its mouth open in a friendly expression, showcasing its playful and cheerful demeanor. The background should be minimalistic, with soft, warm tones to enhance the focus on the dog.