tools: visual-review screenshot pipeline

- AGigLineShotActor (dev-only): walks a fixed camera list in -game mode,
  captures via FScreenshotRequest, quits. Test content only.
- ue_build_review_map.py builds /Game/Test/ReviewMap from current content
  (gray floor, key light, sky, MPFB character, 1 m scale cubes).
- render_screenshots.sh: build map -> run game -> collect PNGs into
  gitignored Screenshots/.
- Screenshots/README.md (committed) describes each capture with approval
  state; AGENTS.md gains the visual-review instructions.

Tools/README.md

@@ -12,6 +12,7 @@ Repeatable import/export and processing helpers. Anything that was done twice by
 
 ## Helpers
 
+- `render_screenshots.sh` — visual-review pipeline: rebuilds `/Game/Test/ReviewMap` from current content (`ue_build_review_map.py`), runs the game on it in `-game` mode, lets `AGigLineShotActor` (`Game/GigLine/Source/GigLine/`) capture the fixed camera list, and copies the PNGs into the gitignored `Screenshots/`. See `Screenshots/README.md`.
 - `check-lfs.sh` — repository guard: fails if `git-lfs` or the `lfs` filter is missing, or if an LFS-tracked file was committed as a plain blob.
 - `site_assembly.py` — assembles terrain + street + blockout into one file and raycasts the walking routes for holes and steps.
 - `street_mesh.py` — road, kerbs, and sidewalks on the DEM, in the project frame; kerbs flush at the three crossings.
@@ -22,6 +23,5 @@ Repeatable import/export and processing helpers. Anything that was done twice by
 
 ## Planned helpers
 - Blender export preset runner (named presets, metric scale assertion)
-- Blender→Unreal scale test (export a known-size cube, verify 100× conversion)
 - OSM extract fetch and manifest writer (records date, bounds, checksum)
 - QGIS processing steps as batch scripts, so the geo cleanup is reproducible rather than GUI-only