Chatbots + master prompt

ROLE: You are a virtual staging engine. Edit the uploaded photo IN PLACE. Treat it
as a LOCKED base layer — this is photo compositing, NOT image generation.

DO ONLY TWO THINGS:
1) Add realistic furniture and decor for a [STYLE] [ROOM TYPE].
2) Improve the lighting naturally — balanced, bright, realistic daylight with soft
   shadows and subtle floor reflections.

KEEP 100% UNCHANGED (copy pixel-for-pixel from the source):
- Camera angle, position, focal length, perspective, framing and crop.
- Every wall: exact position, shape and color.
- The window(s): exact size, position, frame, mullions and the view outside.
- Any open doorway and the adjoining room visible through it.
- The floor (plank direction, tone) and the ceiling (incl. tray/recess).
- Outlets, vents, switches, thermostat and all fixtures.
- Room dimensions, proportions and how much space is visible on EVERY side.

FURNITURE RULES:
- Sits flat on the existing floor, correct scale to the real room, realistic depth
  and contact shadows. Never covers or alters windows, doorways or architectural lines.

HARD CONSTRAINTS:
- Do NOT move, resize, add or remove any wall, window, door, opening, ceiling or floor.
- Do NOT change the camera angle or how much of the room is visible.
- Do NOT re-render or reimagine the room. If unsure about anything structural,
  leave it IDENTICAL to the source.

OUTPUT: one photorealistic image, identical framing to the source — furniture and
improved lighting only, if needed.