Transform the provided image into a professional corporate headshot. Replace the subject's current outfit with a well-fitted navy single-breasted blazer and a crisp white collared shirt. Crucially, preserve the subject's exact face shape, eyeglasses, and facial expression without any alteration. Apply professional softbox studio lighting, ensuring it is slightly warm and completely eliminates any harsh shadows. The final output should be a photorealistic image with high detail, maintaining a 4:5 portrait aspect ratio.