Restore Water-Damaged Portrait Photo

I have one cherished portrait that was caught in a leak and now shows visible warping and lost details. My priority is thorough detail restoration so the image looks as close as possible to its original state—texture, facial features, background and all. Color shifts are minimal and water spots are already cleaned; what I truly need is an expert hand (Photoshop, Affinity, or your preferred pro-grade tool) to rebuild the areas blurred or smeared by moisture.

Please work non-destructively, keep the original resolution, and deliver both the layered working file and a flattened high-quality JPEG/TIFF. The retouch should look natural under close inspection—no obvious cloning patterns or blurring. If you have questions about reference tones or finer features, I can supply a scanned copy of a similar photo for guidance.