feat(kit): façade module kit at the 4.96 m bay, assembled onto eight buildings

- Tools/facade_kit_build.py: the reusable kit (pilaster, sill, lintel, window bay,
  shopfront bay, door bay, cornice, parapet + coping) at the measured 4.96 m bay
  and 3.10 m storey; 16 meshes exported per object through the shared preset with
  a JSON part report recording dims and evidence.
- Tools/ue_import_facade_kit.py: imports to /Game/Hollywood/Kit with
  complex-as-simple collision, so thin panes keep their real faces.
- Tools/ue_apply_facade_kit.py: assembles from each building's own bounding box
  (bays = round(width/4.96), storeys above the ground floor) with shopfronts at
  street level, windows above, pilasters on bay boundaries, cornice and parapet at
  the top. Clears a previous application; unique labels per building.
  638 pieces across six frontage buildings and both north buildings.

Two bugs fixed en route: the window piece was modelled entirely at +Y so it sat
inside the solid wall and was invisible (now projects 3 cm proud with glazing
6 cm inset), and clearing materials mid-build invalidated handles.

Screenshots re-rendered; window rhythm now reads (edge transitions per row rose
from flat to ~197 on the spawn view).

MEMORY.md

@@ -568,3 +568,26 @@ Scope: facts and traps that cost time to establish. Planned work lives in [TODO.
 - The script needs `ROOT` in `ue_build_demo_map.py` and `sys` imported; forgetting
   either fails with `NameError` and an exit code of 0 from the commandlet (always
   read the result file under /tmp/gigline).
+
+## 2026-11-09 — façade module kit (0.1.4)
+
+- `Tools/facade_kit_build.py` builds the kit at the measured **4.96 m bay** and
+  **3.10 m storey**: pilaster, sill, lintel, window bay, shopfront bay, door bay,
+  cornice, parapet + coping = 16 meshes, exported per-object with
+  `fbx_export_preset` plus a JSON part report (dims + evidence per piece).
+- `Tools/ue_import_facade_kit.py` → `/Game/Hollywood/Kit/*`, complex-as-simple
+  collision (a convex hull would fence off the shopfront glazing).
+- `Tools/ue_apply_facade_kit.py` lays the kit out from each building's own bbox:
+  `bays = round(width / 496 cm)`, storeys from height minus the 310 cm ground
+  floor. **638 pieces** over six frontage buildings + both north buildings.
+- **Bug worth remembering:** the first window piece was modelled entirely at +Y
+  (into the wall), so every window sat *inside* the solid blockout wall and was
+  invisible in every render while the placement maths looked right. The kit now
+  projects the surround 3 cm proud with the glazing 6 cm behind its face — a
+  solid-wall blockout cannot carry a real recess, so the piece has to project.
+- Blender gotcha: clearing the scene *including materials* invalidates handles
+  already taken ("StructRNA of type Material has been removed"); clear objects and
+  orphan meshes only, and create the material after the clear.
+- The kit meshes are spawned at the world origin with their position baked into
+  the mesh (like the frontage exports), so placement uses the bbox directly and
+  must not add the actor location.