Keep generated realism runs out of the repository

Ignore docs/screens/realism/ entirely and remove its reports/captures from the
index while leaving the generated folders on disk. Update the asset-tooling and
concept notes to treat realism runs as local QA artifacts. Link scan clean.

docs/screens/concepts/README.md

@@ -26,10 +26,9 @@ The `npc_portrait` capture in `capture_realism.gd` is staged, not posed by the
 crowd: it freezes one NPC on an open patch of sidewalk, parks the rest of the
 crowd out of frame, turns the subject into the camera and stands the guard on the
 sunlit side. It is the only shot where a face fills the frame, so it is the one to
-eyeball after an avatar change (`docs/screens/realism/2026-11-01-npc/`).
+eyeball after an avatar change (generate a local run under `docs/screens/realism/`).
 
-Cross-cutting targets, for comparison with the 2026-11-01 captures in
-`docs/screens/realism/2026-11-01-v2/sheet.jpg`:
+Cross-cutting targets, for comparison with locally generated realism runs:
 
 - **Exposure.** The concepts keep the ground mid-grey. The game's sidewalk is close to white,
   so it is overexposed.