feat: scale village queries and enrich Jajce center

docs/PROJECT_CONTEXT.md

@@ -2,7 +2,7 @@
 
 > Agent-facing context for understanding the project quickly.
 >
-> Snapshot basis: repository state on July 14, 2026. Treat the code as the
+> Snapshot basis: repository state on July 16, 2026. Treat the code as the
 > source of truth when this document and the implementation differ.
 
 See the [documentation map](README.md) for the authority and scope of each plan.
@@ -193,12 +193,15 @@ study, and patrol target typed activity sites. The migration is documented in
   and GUT run through the local quality gate)
 - **Main scene:** `res://main.tscn`
 - **Terrain:** Terrain3D 1.0.2 is installed and enabled
-- **Jajce runtime:** reusable 512 m Terrain3D seed, greybox landmarks, stable
-  ResourceNode placement, lookdev camera, and Terrain3D-derived runtime
-  navigation with collision guardrails
+- **Jajce runtime:** reusable 512 m Terrain3D seed, stable ResourceNode
+  placement, larger citadel/village-center composition, terrain-following river
+  ribbon, reactive camera-local grass, and Terrain3D-derived runtime navigation
+  with collision guardrails
 - **Lookdev baseline:** `Jajce Lookdev 01` is captured at
   `docs/baselines/jajce_lookdev_01.png` with
   `tools/capture_jajce_lookdev.gd`
+- **Matched center baseline:** `Jajce Center 02` preserves a fixed before/after
+  overview plus a close grass-readability capture under `docs/baselines/`
 - **Runtime baseline:** `Simulation Garden 01` is captured as paired debug and
   cinematic `main.tscn` images plus an empty/restocked pantry close pair under
   `docs/baselines/` with `tools/capture_simulation_garden.gd`
@@ -336,13 +339,16 @@ distance with resource `safety_risk`, `comfort_distance`, and
 
 - a centered 512 m Terrain3D landscape split across four regions;
 - deterministic shaped terrain data and six game-owned surface layers;
-- fortress, houses, mill, bridge, shader river/waterfall, mist, and smoke;
+- a larger summit citadel, eight cascading houses, mill, full-span bridge,
+  rock-framed waterfall, mist, smoke, and a Terrain3D-sampled river ribbon;
 - authored dirt path strips that make the current village task loop readable;
 - compact silhouette props for the ridge landmark, guard, study, and rest
   sites, plus a physical pantry whose empty/low/stocked arrangement follows
   authoritative food storage;
 - warm sky, fog, shadows, coherent wind-reactive foliage, and breeze-aligned
   chimney smoke;
+- short patchy camera-local grass that receives at most eight real player/NPC
+  transforms, authored conifer clusters, and oversized ambient butterflies;
 - one sparse terrain-aware calligraphic gust field with two or three soft
   tapered strokes per burst;
 - eighteen ResourceNodes preserving stable food/wood discovery IDs;
@@ -418,6 +424,8 @@ views, modifiers, and priorities.
 Focused `RefCounted` collaborators keep rule ownership visible:
 
 - action systems own selection, execution progress, and target resolution;
+- `SimulationPopulationView` owns the disposable all/living/starving stable-ID
+  query indexes rebuilt at deterministic tick boundaries;
 - `VillageEconomy` owns storage/inventory transactions and synchronized
   village resource views;
 - `SimulationEventLog` owns deterministic event history and queries;
@@ -545,6 +553,7 @@ NpcVisual navigates through the active world
 │   ├── events/                Ordered event history and queries
 │   ├── knowledge/             Per-NPC facts, provenance, transfer, and retention
 │   ├── opportunities/         Knowledge-gated unresolved-condition projection
+│   ├── population/            Transient per-tick NPC query indexes
 │   ├── persistence/           Validated local save-slot storage
 │   ├── relationships/         Directed social consequences and queries
 │   └── state/                 Versioned simulation-state records