Edit this exact live-action photograph, preserving the entire full-sized grey steel workboat, camera, sky, water, city background, cabin, railing, all five tire fenders, existing cleats, small handheld white megaphone, A4 folder, and black flag reading exactly 天阙号. Make ONLY this story-state change: place one compact dark burgundy waterproof bait sack, about 25cm tall, on the stern deck immediately in front of the existing closed grey metal storage box on the RIGHT of the image. The sack is fully closed with a gathered neck tightly tied by one beige cord. Its material is matte opaque cloth, no visible contents, no mesh, not a bulky duffel bag. Coil a little of the same thin tether neatly beside it on the deck, not a giant rope coil. Keep the deck walkable. NO red water, no bag overboard, no people, no new hardware or loose hero props. Do not enlarge the megaphone or change the hull, flag, cabin, composition or photographic realism. One 16:9 photograph, minimal local edit.