Point the README at the runtime image root

Update the resize/audit examples and the screen-design section to
assets/images/ui|scenes, with docs/screens/designs as the reference snapshot.
The separate realism-pass README hunk stays unstaged.

README.md

@@ -172,7 +172,7 @@ Crop uses the image center by default; `--x` and `--y` select an explicit crop o
 
 ```bash
 python3 tools/asset_pipeline.py crop assets/textures/source.png assets/textures/crop.png --width 256 --height 128
-python3 tools/asset_pipeline.py resize assets/textures/source.png assets/images/backgrounds/scene.png --width 1920 --height 1080 --fit cover
+python3 tools/asset_pipeline.py resize assets/textures/source.png assets/images/scenes/scene.png --width 1920 --height 1080 --fit cover
 python3 tools/asset_pipeline.py seamless assets/textures/rough_tile.png assets/textures/tile.png
 ```
 
@@ -180,7 +180,7 @@ Audit accepts image files or directories. `--role auto` infers common roles from
 
 ```bash
 python3 tools/asset_pipeline.py audit assets/textures
-python3 tools/asset_pipeline.py audit assets/images/backgrounds --role background --json
+python3 tools/asset_pipeline.py audit assets/images/scenes --role background --json
 python3 -m unittest discover -s tools -p 'test_*.py'
 ```
 
@@ -350,9 +350,9 @@ python3 tools/screen_designs.py judge --dry-run    # build requests, no network
 The catalogue covers 21 screens: the eleven README captures plus the start menu,
 pause overlay, settings, shift review, radial menu, emergency radio, wand
 screening, Joke Shop queue, TV Studio arrival, crowd panic, responder arrival,
-body-camera timeline, and the escalation HUD. All 19 have an AI reference in
+body-camera timeline, and the escalation HUD. All 21 have an AI reference in
-`docs/screens/designs/`; the eleven screens with staged captures are also compared
+`assets/images/ui/` (snapshot in `docs/screens/designs/`); the eleven screens with
-or judged against the running game.
+staged captures are also compared or judged against the running game.
 
 `compare` flags gross drift: wrong aspect ratio, undersized frame, near-blank
 frame, and large layout/palette/detail distance. It is a regression gate, not a